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Gunter Muhrer (ESS)13/04/2026, 09:00
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Helmut Schober (European Spallation Source)13/04/2026, 09:10
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Giuliana Manzin13/04/2026, 09:40
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Michel Kenzelmann (Paul Scherrer Institut)13/04/2026, 10:10
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Mr Matt North (STFC, ISIS), Stephen Gallimore (UKRI - STFC)13/04/2026, 11:00
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Stephan Förster (Forschungszentrum Jülich GmbH)13/04/2026, 11:30
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Rikard Linander (European Spallation Source ERIC)13/04/2026, 13:30Oral Presentation
An update of the ESS target station project will be given.
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Chalres Taylor (Los Alamos National Laboratory)13/04/2026, 13:30Oral Presentation
The Los Alamos Neutron Science Center (LANSCE) has been a cornerstone of pulsed neutron science and national security applications for over fifty years, delivering 800 MeV proton beams to multiple user facilities including the Lujan Center’s 1L neutron spallation target. The Lujan Center’s neutron spallation performance, particularly for high-resolution and high-flux experiments, places...
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Huaican CHEN (Institute of High Energy Physics, Chinese Academy of Sciences)13/04/2026, 13:30Oral Presentation
The Multi-Physics Instrument (MPI) is the first neutron total scattering instrument based on the China Spallation Neutron Source (CSNS) in China, which is jointly constructed by Dongguan University of Technology, the Institute of High Energy Physics, CAS and City University of Hong Kong. This project was begun in September 2018 and completed in June 2021, with its comprehensive performance...
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JORGE GARCIA TORTOSA13/04/2026, 13:50Oral Presentation
SCK CEN is developing MYRRHA, a large-scale Accelerator Driven System (ADS). MYRRHA shall be a subcritical nuclear reactor driven by a high-power linear proton accelerator (600 MeV @ 4 mA), which sustains the nuclear reaction. In the initial phase, known as the MINERVA project (100 MeV @ 4 mA LINAC), the goal is to demonstrate the high reliability requirements on the accelerator as required...
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Dr Jialian He (Forschungszentrum Jülich GmbH)13/04/2026, 13:50Oral Presentation
The Science case of a macromolecular single crystal neutron diffractometer is based on two pillars: The first one is given by the fact, that neutrons are scattered from the nuclei. In particular, hydrogen has a scattering cross section in the same order of magnitude than carbon, nitrogen or oxygen. This renders neutron scattering complementary to x-ray or electron scattering or transmission...
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Masahide Harada (J-PARC center, Japan Atomic Energy Agency)13/04/2026, 13:50Oral Presentation
The pulsed spallation neutron source at the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC) consists of a mercury target, three liquid-hydrogen moderators and a beryllium and iron reflector, providing high intense pulsed neutron beam toward to 21 instruments. As of February 2026, the neutron source has been operating stably with...
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Yuhua Ma13/04/2026, 14:10Oral Presentation
This paper presents the physical design and preliminary beam measurement results of a Laue orientation-type neutron imaging device developed on the beam line 8A of the China Spallation Neutron Source (CSNS). The device is designed to meet the urgent demands of materials science, energy, and aerospace fields for multi-scale, in-situ, and non-destructive characterization of materials under...
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Prof. Wen Yin (Institute of High Energy Physics, CAS)13/04/2026, 14:10Oral Presentation
The China Spallation Neutron Source (CSNS) target station converts high energy (1.6GeV,62.5µA) protons into lower-energy, short-pulsed neutron beams optimized for the neutron scattering instruments. The interaction between the pulsed high-energy proton beam with the light water-cooling tungsten target produces the fast neutrons through the spallation reaction. Then the fast neutron will be...
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Mr Yongchuan XIAO13/04/2026, 14:10Oral Presentation
Dong Guan Boron Neutron Capture Therapy (D-BNCT) device uses a proton beam with an energy of 2.8 MeV to produce thermal neutrons. The peak power of the beam is 56 kilowatts. The entire system includes a proton linear accelerator, a rotating lithium target, and two treatment rooms. In pursuit of device stability, a highly stable ECR ion source was developed to serve as the proton injector for...
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Bertrand Blau (Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)13/04/2026, 14:50Oral Presentation
In 2011, a spallation neutron source dedicated solely to the production of ultracold neutrons (E_kin < 300 neV), referred to as UCN, began operation at the Paul Scherrer Institute (PSI), Switzerland.
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The key feature of the facility is a cold moderator containing about 30 liters (~5 kg) of frozen deuterium kept at a temperature of 5 K. This ice block first moderates the thermal neutrons... -
Mr Peter Willendrup (European Spallation Source (ERIC))13/04/2026, 14:50Oral Presentation
The McStas[1-3] Monte Carlo ray-tracing package for neutron instrument simulations was founded at RISØ in Denmark in 1997. For more than 25 years it has served the neutron scattering community as a stable workhorse for design and optimisation of novel neutron optical systems and has in the later years become an important enabler within the area of virtual experiments.
McStas runs on all...
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Lukas Zavorka (Oak Ridge National Laboratory)13/04/2026, 14:50Oral Presentation
The major goal of a conceptual exploratory study at the Second Target Station (STS) of the Oak Ridge National Laboratory’s (ORNL) Spallation Neutron Source (SNS) was to develop an alternative moderator design with a significantly improved neutronics performance at longer wavelengths compared to the current final design, which comprises supercritical parahydrogen moderator, light water...
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230. New para-hydrogen cold neutron source at the Budapest Research Reactor: Monte Carlo simulationsDr Dmitrii Shapiro (JCNS)13/04/2026, 15:10Oral Presentation
The planned upgrade of the neutron guide system at the Budapest Research Reactor (BRR) creates an opportunity to replace the existing hydrogen disk moderator with a new design. Using the Monte Carlo code PHITS we investigated two options: box-shaped para-hydrogen moderator and assemblies of flat para-hydrogen moderators. The simulations indicate that the optimal solution for the phase-space...
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Prof. Tianjiao Liang (China Spallation Neutron Source, Institute of High Energy Physics, Chinese Academy of Science)13/04/2026, 15:10Oral Presentation
The China Spallation Neutron Source (CSNS) is an accelerator-based multidisciplinary neutron user facility located in Dongguan, Guangdong, China. Following the opening of three neutron instruments to users in October 2018, eight additional instruments have been constructed in recent years under the Cooperative Instruments Project. The CSNS-II Project commenced in January 2024, with nine...
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Franz Gallmeier (Oak Ridge National Laboratory)13/04/2026, 15:10Oral Presentation
Neutron guides transport neutrons through long paths by exploiting total external reflection from highly polished surfaces. Neutron supermirrors transport even more neutrons by diffraction from multilayers of materials with contrasting scattering lengths. These supermirrors typically have thousands of alternating layers of nickel and titanium on the neutron beam-facing surface of the mirror....
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Nicola Rizzi (Paul Sherrer Institute)13/04/2026, 15:30Oral Presentation
We investigated the potential of liquid Hydrogen Deuteride (HD) as a cold neutron moderator to bridge the gap between high-brightness, low-dimensional hydrogen-based sources, and high-intensity, large-volume deuterium-based sources. While cold neutron production traditionally relies on the high moderating efficiency of liquid H2 for brightness or the low absorption of liquid D$_2$ for...
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Mr Eron Kerstiens (LANSCE)13/04/2026, 15:30Oral Presentation
Abstract is attached.
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Thomas Kittelmann (European Spallation Source DMSC)13/04/2026, 15:30Oral Presentation
The NCrystal project provides an ambitious Monte Carlo backend for modelling thermal neutron interactions within many kind of materials, and includes a range of both inelastic and elastic scattering models. Users can choose from a large pre-existing library of material definitions, or define new materials using a range of built-in facilities for configuration and inspection. Usage of NCrystal...
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Franz Gallmeier (Oak Ridge National Laboratory)13/04/2026, 16:00Oral Presentation
In spallation neutron sources, pre-moderators surrounding coupled cryogenic moderators helps thermalizing fast and epithermal neutrons before they reach the cold volume, directly influencing the emitted cold-neutron intensity and spectrum of beam to be extracted. At the Spallation Neutron Source (SNS), the coupled hydrogen moderator currently operates with a water pre-moderator, whose...
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Mads Bertelsen (European Spallation Source ERIC)13/04/2026, 16:00Oral Presentation
Design of neutron scattering instruments has, in recent decades, benefited significantly from Monte Carlo ray-tracing simulations, enabling rapid evaluation and optimization of instrument performance. Even neutron source design has been optimized in conjunction with instrument performance [1]. Although instrument simulations are computationally less demanding than full source simulations, the...
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Dan Wilcox (RAL)13/04/2026, 16:00Oral Presentation
This talk will present the latest developments in analysis and operating experience of ISIS spallation targets. There are two main parts, corresponding to Target Station 1 (TS1) and Target Station 2 (TS2) targets:
The new-style TS1 Project target and reflector have now been operating since November 2022 [1]. Temperature and flow data has been recorded throughout. This data is a valuable...
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Douglas Di Julio (European Spallation Source ERIC)13/04/2026, 16:20Oral Presentation
NCrystal is an open-source software package developed at the European Spallation Source for modelling low-energy neutron transport in materials. It includes models for both inelastic and elastic scattering across a wide range of solid materials, such as polycrystalline and single-crystalline systems, and liquids are currently modelled using pre-computed scattering kernels. Several years ago, a...
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Ulrich Rücker (JCNS-HBS, Forschungszentrum Jülich GmbH)13/04/2026, 16:20Oral Presentation
In the framework of the development of the HBS HiCANS project in Jülich, a 1-dimensional cryogenic moderator based on liquid para-hydrogen has been designed, constructed, and tested. Para-hydrogen is hydrogen with antiparallel arrangement of the nuclear spins in the molecule. The mean free paths for thermal and cold neutrons in liquid para-hydrogen differ by about one order of magnitude. This...
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Szabina Török (Hun-Ren Centre for Energy Research)13/04/2026, 16:20Oral Presentation
The Budapest Neutron Centre (BNC) is a complex neutron facility dedicated primarily to non-destructive materials research and neutron irradiation. The neutron source itself is a 10 MW research reactor with the highest neutron beam flux in Central Europe. It operates a wide range of instruments installed at the reactor’s horizontal beam channels, as well as in vertical channels located within...
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Linda Coney (European Spallation Source ERIC)13/04/2026, 16:40Oral Presentation
The European Spallation Source (ESS) Target Station is comprised of Neutron Factory (NF) and Remote Handling (RH) systems. Neutron Factory systems produce, moderate, and deliver neutrons to the instruments and include related infrastructure such as shielding and cooling. Operating the Neutron Factory creates significant inventories of nuclides in the target and nearby components, structures,...
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Fabian Beule (Forschungszentrum Jülich GmbH), Nicolo Violini (Jülich Forschungszentrum GmbH)13/04/2026, 16:40Oral Presentation
Monte Carlo simulations are a key tool for the design and optimisation of neutron scattering instruments at modern reactor and spallation neutron sources.
VITESS (Virtual Instrumentation Tool for ESS) is a modular simulation framework widely used for modelling neutron transport through complex instrument layouts and evaluating instrument performance during the design phase.
Beyond...
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Franz Gallmeier (Oak Ridge National Laboratory)13/04/2026, 16:40Oral Presentation
Monte Carlo neutron transport and instrument simulations are widely used to study moderators, reflectors, beamlines, and other neutron-system components in pulsed neutron sources. Yet coupling such models to formal optimization and uncertainty quantification workflows often remains dependent on problem-specific scripts. This work presents McDakDriver, a Python framework that couples Dakota...
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Franz Gallmeier (Oak Ridge National Laboratory)14/04/2026, 09:00
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14/04/2026, 09:20
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Tianjiao Liang (China Spallation Neutron Source, Institute of High Energy Physics, Chinese Academy of Science)14/04/2026, 09:40
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Chalres Taylor (Los Alamos National Laboratory)14/04/2026, 11:00
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Fernando Sordo (ESS Bilbao)14/04/2026, 11:30
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Kenji Nakajima (J-PARC)14/04/2026, 13:00Poster
Here we show an initial and brief concept of our idea of TUKUYOMI, a collaborative chopper spectrometer (CCS). CCS is a concept of a chopper spectrometer designed to complement existing spectrometer with low-cost in construction and operation by compromising on functionality and performance under assumption of the existence of full-scall spectrometers. Therefore, CCS-TUKUYOMI is a...
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José Ignacio Marquez Damian (European Spallation Source ERIC)14/04/2026, 13:03Poster
The European Spallation Source Spallation Physics Group (ESS SPG) supports the construction and operation of the facility through research and development in radiation transport, shielding design, material science, and radiation physics, with a particular focus on low‑energy neutron interaction modelling. In collaboration with the ESS Data Management and Scientific Computing centre and...
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Fabian Beule (Forschungszentrum Jülich GmbH)14/04/2026, 13:06Poster
Since its early days, the Monte Carlo simulation software Vitess is operated with a graphical user interface. Recently, a new Python package has been developed which provides a programming interface that can be used directly in Jupyter notebooks or called from user-written code.
This poster shows the design of the Python API and its capabilities.
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It provides usage examples, from the... -
Myles Klaiber (UKRI - STFC)14/04/2026, 13:09Poster
During operations in Target Station 1 (TS1) of the ISIS neutron and muon source, the Target, Reflector and Moderator (TRaM) trolley became immobilised due to interference with stainless steel tunnel cladding within the Target Services Area (TSA). The resulting obstruction caused localised damage and prevented further trolley movement, requiring intervention in a highly constrained and...
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Douglas Di Julio (European Spallation Source ERIC)14/04/2026, 13:12Poster
The exceptional properties of liquid helium make it a favorable medium for ultra-cold neutron production at neutron scattering facilities. In previous work, we presented a model for Monte Carlo simulations of neutron scattering in superfluid helium at temperatures up to approximately 1.3 K [1]. However, a complete description of neutron interactions in the material also requires a model for...
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Bastiaan Biesheuvel (Paul Scherrer Institut PSI)14/04/2026, 13:15Poster
Approaching 30 years of SINQ operation, the facility systems still contain many of the original components. These include three primary heavy water (D$_{\mathrm{2}}$O) loops and a light water cooling system. A total of 9.5 m³ of heavy water and 2.5 m³ of light water are circulated at mass flow rates of up to 15 kg/s to dissipate heat loads of up to 1 MW.
The circuits must be maintained to...
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Larissa P. Cunico14/04/2026, 13:18Poster
European Spallation Source (ESS) is a multidisciplinary research facility built around the world’s most powerful neutron source. Primary water cooling system loops for Target station components—such as the moderator, reflector, shielding, and plugs—may contain activated impurities that originate primarily from corrosion. These impurities are removed by Ion Exchange columns filled with...
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Tetsuya Yokoo (High Energy Accelerator Research Organization (KEK))14/04/2026, 13:21Poster
POLANO is the chopper type spectrometer with a polarization analysis capability in the Materials and Life Science Experimental Facility (MLF), J-PARC. After several years spent for designing, manufacturing and construction of the spectrometer, it is commenced the beam commissioning and a part of user program with unpolarized neutron beam condition. Intensity, divergence, TOF beam profile...
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Dr Elena Donegani (European Spallation Source ERIC)14/04/2026, 13:24Poster
The commissioning of the high-power proton accelerator of the European Spallation Source (ESS) started in 2018 and it is ongoing in Lund (Sweden). During the multiple commissioning phases, a variety of beam destinations have been primarily used to safely absorb and dissipate the high-power proton beam.
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This presentation will summarize the measurements and contributions to the commissioning... -
Xiaojun Nie (IHEP)14/04/2026, 13:27Poster
To meet the support requirements of a long-span acceleration device, a large-span precision adjustment bracket was developed. A double-layer adjustment scheme was adopted to satisfy the individual and overall adjustment needs of the acceleration device cavity. For ease of adjustment, the bracket was designed with four-point support, and the optimal support positions were determined through...
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Jaroslaw Fydrych (European Spallation Source ESS ERIC)14/04/2026, 13:30Poster
The European Spallation Source (ESS) is a next-generation neutron research facility currently under construction in Lund, Sweden. The rotating tungsten target wheel will be cooled by gaseous helium supplied by the Target Primary Cooling System (System 1010). During operation, the process helium will be continuously purified by the Target Primary Cooling Purification System (System 1015).
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To... -
Atefeh Sadeghzadeh (European Spallation Source ERIC)14/04/2026, 13:33Poster
The Target Safety System (TSS) is part of the overall radiation safety plan for the Neutron Factory in the European Spallation source (ESS). The system is designed to stop proton production if vital process conditions measured at the Neutron Factory exceed defined safety boundaries, with the potential to cause unacceptable radiation exposure to third parties (i.e., the public outside ESS)....
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Tapaswi More14/04/2026, 13:36Poster
ISIS Neutron and Muon source houses a solid methane moderator in the Target station 2, operational since 2009, includes pure aluminium foam to enhance cooling performance and neutron moderation efficiency. Pure Aluminium offers high thermal conductivity at cryogenic temperatures (Woodcraft, 2005) and a porous structure that increases methane contact area. The new moderator assembly consists of...
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Antoni Simelio (CONSORCIO ESS BILBAO)14/04/2026, 13:39Poster
The MIRACLES instrument is the time-of-flight backscattering instrument of the ESS. This spectrometer is designed to provide a high energy resolution and flexible resolution for the study of the dynamics of molecules and atoms in biological systems, energy materials and other functional materials.[1]
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The experimental station is a key system of MIRACLES, consisting of a concrete building... -
Alexandra Chrysafi (ISIS Neutron and Muon Source)14/04/2026, 13:42Poster
Moderators are a key component of neutron sources, slowing neutrons produced in the target to energies suitable for materials science experiments. At large facilities such as the ISIS Neutron and Muon Source, once moderators are installed, modifications or troubleshooting become extremely difficult. Developing a dedicated local testing platform would allow moderators and associated systems to...
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Frederic OTT (CEA Univ. Paris-Saclay), Nicolas Pichoff (CEA/DRF/IRAMIS), Mr Thomas Vassiliades (CNRS-LLB)14/04/2026, 13:45Poster
Since the shutdown of the ORPHEE reactor in 2019, France no longer has a national neutron facility to study the internal structure of materials. Currently, French scientists can still rely on the European source at the ILL in Grenoble, as well as on several facilities in Europe (ISIS, PSI…) or in the USA (SNS).
With the arrival of the new ESS source (SE), the shutdown of the ILL (in...
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akshat damani (STFC)14/04/2026, 13:48Poster
The ESS target monolith consists of neutron production systems and shielding. Many of these components have a defined design life and will require periodic exchange and maintenance. Upon removal, these components must be transferred to the Active Cells Facility(ACF) for interim storage and/or further processing.
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The components are designed to facilitate remote handling operations. This... -
Larissa P. Cunico14/04/2026, 13:51Poster
At the European Spallation Source (ESS), the Moderator Reflector Plug (MRP) in the target station features a unique geometry integrating cold and thermal moderators to optimise neutron brightness across multiple beam ports. Water is used as a pre-moderator surrounding the moderator piping. This complex configuration introduces design challenges, including closely spaced hydrogen and water...
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Daniel Wells Calvo (Science and Technology Facilities Council)14/04/2026, 13:54Poster
ISIS-II, the proposed successor to the UK’s pulsed neutron and muon source, has been baselined with two newly-designed spallation targets [1]: An 800 kW, high-brightness stationary target (TS-II). And a 1.6 MW, high-resolution rotating target (TS-I).
Research highlighted decay heat as the key limiting factor for the former and rotational inertia or complexity for the latter. This work...
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Katherina Gelborova (ISIS Neutron and Muon Source, STFC), Mr Steven Lilley (ISIS Neutron and Muon Source, STFC)14/04/2026, 13:57Poster
Self-Powered Neutron Detectors for ISIS
$^1$Katherina Gelborova, $^1$Steven Lilley
$^{1}$ ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United KingdomSelf-powered neutron detectors (SPNDs) have been a reliable choice for the mapping and monitoring of neutron flux...
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Leyao Huang (The Institute of High Energy Physics, Chinese Academy of Sciences)14/04/2026, 14:00Poster
Boron Neutron Capture Therapy (BNCT) is an advanced radiotherapy technology that uses the specific reaction between boron atoms and thermal neutrons to selectively kill tumor cells, featuring strong targeting and low damage to normal tissues. This paper details the design and commissioning work of the low energy beam transport (LEBT) and high energy beam transport (HEBT) sections of BNCT02,...
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Tomás Dähn Costante (European Spallation Source)14/04/2026, 14:03Poster
Reliable and efficient tools are required to estimate radioactivity induced by high-energy particles in Spallation neutron sources, such as the European Spallation Source. As a first step toward the development of such tools, a radiation transport code must be selected and validated. To that end, the Particle and Heavy Ions Transport code System (PHITS) is proposed and evaluated against...
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Lushan Weerasooriya (United Kingdom Atomic Energy Authority)14/04/2026, 14:06Poster
Hot cells, which are shielded containment chambers for handling radioactive materials, play a critical role across the nuclear sector. They support activities in nuclear power generation, neutron source facilities, nuclear medicine, and scientific research. Although hot cells have traditionally been static structures equipped with lead glass viewing windows, mechanical remote handling systems,...
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Joachim Pütz (Forschungszentrum Jülich GmbH)14/04/2026, 14:09Poster
The POLI instrument at FRM II is dedicated to carrying out experiments with polarised neutrons. Before being scattered at the sample, the neutron beam passes through a polariser. After scattering, the direction of spin polarisation can be analysed. In recent years, new polariser and analyser units have been built for an upgrade of POLI, which polarise the neutrons in situ, and will replace the...
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Michael Schaaf14/04/2026, 14:12Poster
Due to the worldwide scarcity of the extremely rare isotope helium-3 and its high procurement costs, it is economically reasonable to recycle contaminated gas from discarded detectors.
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Therefore, we are frequently faced with the task to clean and to reuse this gas for the construction of new detectors or to recondition the gas within existing detectors in order to maintain long term... -
Fernando Sordo Balbín (ESS Bilbao)14/04/2026, 14:15Poster
STUMM-PROTO is a full-scale pressurised and instrumented vessel developed to validate thermal and instrumentation experiments for the STUMM programme. ESS-Bilbao led the mechanical design and fabrication control of the pressure vessel in accordance with RCC-MRx rules for an N3Rx component. The work included the development of three dedicated FEM sub-models (Container + Lower Attachment; Upper...
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Jaroslaw Fydrych (European Spallation Source ESS ERIC)14/04/2026, 14:18Poster
The European Spallation Source (ESS) is a next-generation neutron research facility currently under construction in Lund, Sweden. Its rotating tungsten target wheel will be cooled by gaseous helium supplied by the Target Primary Cooling System (System 1010). During beam operation, spallation reactions will generate both gaseous and particulate radioactive contaminants, while locally increasing...
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Paraskevi Mastrokalou (European Spallation Source ERIC)14/04/2026, 14:21Poster
Background reduction is critical for achieving high signal-to-noise ratios in neutron scattering instruments, yet mitigation strategies have historically relied on empirical practices and accumulated experience rather than on systematic, quantitative analysis. Instrumental background typically arises from multiple interacting sources associated with shielding, structural components, and the...
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Larissa P. Cunico14/04/2026, 14:24Poster
At the European Spallation Source (ESS), maintenance activities on components cooled by the Primary Water Systems—such as the moderator and reflector plug, proton beam window, monolith inner shielding, and monitoring plugs in the Target Station—require complete draining and drying of cooling circuits. This is essential to prevent personnel exposure to activated water during component...
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Nathaly De La Rosa (European Spallation Source ERIC)14/04/2026, 14:27Poster
The European Spallation Source (ESS) is advancing towards full operation, with detector system development playing a central role in instrument readiness. This work presents the validation and integration of the neutron detection system for MIRACLES, the time-of-flight backscattering spectrometer at ESS. The MIRACLES detection system uses position-sensitive He-3 tubes arranged in resistively...
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Alexandru Baron (Oak Ridge National Laboratory)14/04/2026, 14:30Poster
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a world-leading pulsed neutron facility supporting a broad range of research in materials science, chemistry, biology, and engineering. To address emerging scientific challenges and expand the capabilities available to the neutron science community, the Second Target Station (STS) project is developing a next-generation...
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Gregory Tucker (European Spallation Source ERIC)14/04/2026, 14:33Poster
In order to address the demand for smaller samples and increased experimental availability from pulsed-source time-of-flight neutron spectroscopy instruments, we have developed the concept of symbiotic spectrometers for the European Spallation Source. Spectrometers in symbiosis share a single beam port and neutron guide, each utilizing independent parts of the extracted phase space.
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Njord is... -
Steve Lilley (STFC)14/04/2026, 15:20Oral Presentation
The ISIS Endeavour programme is a mix of new and upgraded neutron and muon instruments at ISIS. Some instruments are completely new such as WISH-II, whilst others are upgrades ranging from minor changes to completely rebuilding large parts of the instrument such as HRPDX. The majority of the neutron instrument projects in the Endeavour programme include requirements for radiation shielding...
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Mr Magnus Göhran (Abitude Consulting AB)14/04/2026, 15:20Oral Presentation
Please see the attached document for abstract
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Monika Hartl (ESS)14/04/2026, 15:20Oral Presentation
We present an update on the design of VESPA, the neutron vibrational spectrometer of the European Spallation Source (ESS) [1]. VESPA is a broad-band indirect-geometry spectrometer designed to measure molecular vibrations and address a wide range of research areas highly relevant to society and industry, such as renewable energies or catalysis. The large neutron flux of the ESS will enable...
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Tarek El-Kordy (FH Aachen, Forschungszentrum Jülich ITE)14/04/2026, 15:40Oral Presentation
The joint project 99MoBest explores a reactor-independent, accelerator-driven approach for the large-scale production of Mo-99. Its daughter nuclide, Tc-99m, remains the most widely used radionuclide in the field of diagnostic imaging. This project seeks to demonstrate the feasibility of weekly production rates of up to 2400 Ci of Mo-99 through neutron capture on remotely exchangeable...
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Dr Romuald Hanslik (Forschungszentrum Juelich)14/04/2026, 15:40Oral Presentation
The High Brilliance Neutron Source (HBS) project involves the development of a next-generation neutron research facility based on new concepts and recent technological advancements. Unlike other facilities, it does not use fission or spallation but instead uses low-energy nuclear reactions in a compact assembly.
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A prototype of the HBS Target-Moderator-Reflector (TMR) assembly has been... -
Kyriakos Karyos (CEA/LLB)14/04/2026, 15:40Oral Presentation
The ICONE (Innovative COmpact NEutrons facility) project of a French High-Intensity Compact Accelerator-driven Neutron Source (HiCANS) is aimed at delivering an instrument suite for the French scientific community at the 2035 horizon. ICONE will produce moderated neutrons in the energy range of < 200 meV, making them suitable for use on neutron scattering instruments. A major challenge is the...
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Dr Takashi Naoe (Japan Atomic Energy Agency)14/04/2026, 16:00Oral Presentation
A liquid mercury target system for the pulsed spallation neutron source is in operation at the Materials and Life Science Experimental Facility (MLF) of Japan Proton Accelerator Research Complex (J-PARC). During the operation, mercury itself act as a coolant and circulates through the system consisting of the target vessel, heat exchanger and pump to remove the heat from the high-energy proton...
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Dr Jingjing Li (Forschungszentrum Jülich GmbH)14/04/2026, 16:00Oral Presentation
Over the last years, High-Current Accelerator-driven Neutron Sources (HiCANS) have attracted increasing interest and represent a promising option for the next generation of neutron sources. The High Brilliance Neutron Source (HBS) project, developed by the Jülich Centre for Neutron Science at Forschungszentrum Jülich, aims to provide an efficient HiCANS for various scattering, analytical and...
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Gøran Nilsen (ISIS Neutron and Muon Source)14/04/2026, 16:00Oral Presentation
Quasi-elastic neutron scattering (QENS) provides atomic-scale temporal and spatial information about diffusion, rotation, and other slow dynamics in systems ranging from catalysts to energy materials to living cells. On the other hand, it is highly limited by flux, particularly when applied to small samples (e.g. proteins or other biomolecules) or weak scatterers (e.g. Li+ or Na+ motions...
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Mr Melvin Borrego (Los Alamos National Laboratory)14/04/2026, 16:20Oral Presentation
Installation of Mercury Shutters at LANSCE
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Melvin Borrego (Operations Manager LFO-EXP)
As part of a long-term modernization effort at the Los Alamos Neutron Science Center (LANSCE), the MARK-III target of the 1L Target system was replaced in 2022 with a new design, creating a unique opportunity to upgrade legacy beamline shutters unchanged since 2002. This effort enabled replacement of... -
Zhiduo Li (CSNS)14/04/2026, 16:20Oral Presentation
The remote handling system (RHS) serves as a critical component of the target station and a key guarantee for the safe, stable, and efficient operation of the China Spallation Neutron Source (CSNS) facility. Since the formal operation of CSNS in 2018, the RHS has maintained robust overall performance, successfully executing a substantial volume of remote handling tasks for various maintenance...
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Sebastian Jaksch (European Spallation Source ERIC)14/04/2026, 16:20Oral Presentation
The Small-K Advanced Diffractometer (SKADI) is a small-angle neutron scattering instrument currently being constructed at the Eurpean Spallation Source (ESS) as a collaboration between the Forschungszentrum Jülich and the Laboratoire Leon Brillouin, France.
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I will be general purpose polarized high-flux (7.7 10$^8$ n s$^{-1}$ cm$^{2}$ ) and high resolution SANS instrument with a simultaneous... -
William Blyth (UKAEA)14/04/2026, 16:40Oral Presentation
This paper provides an overview of the ESS Active Cells (the ESS rad-waste processing facility) and an update on the installation and commissioning progress. It introduces the systems engineering approach and the progressive testing which has been utilized to de-risk the final system integration.
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Daniel Zeitz (Paul-Scherrer-Institute)14/04/2026, 16:40Oral Presentation
Neutron beamlines at spallation sources are exposed to a broad spectrum of neutron energies, from thermal to several hundred MeV, yet no single material can simultaneously moderate and capture neutrons across this entire range. Additive manufacturing offers a route to overcome this limitation by enabling the combination of complementary absorber materials into geometrically tailored,...
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Roberto Bedogni (INFN-LNF)15/04/2026, 09:10Oral Presentation
Electronic personal dosemeters (EPDs) are widely used for operational radiation protection in large-scale facilities such as nuclear power plants and particle accelerators. While EPDs for photon radiation are well established and generally comply with relevant standards, neutron EPDs remain scarce. Those that do exist often exhibit strong energy and angular dependences, limiting their use...
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Erik Iverson (Oak Ridge National Laboratory)15/04/2026, 09:10Oral Presentation
We describe a series of measurements supporting the characterization of neutron beams at the Spallation Neutron Source. These measurements provide validation of target, moderator, and reflector calculations and neutron guide transport, as well as enabling the diagnosis of various operational and aging problems within these components.
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Marc Kickulies (European Spallation Source ERIC), Dr Yannick Beßler (Forschungszentrum Jülich GmbH)15/04/2026, 09:10Oral Presentation
The MRP is a highly integrated component, optimised for maximum brightness performance at 5 MW proton beam power. The MRP 1 consists of two cold para hydrogen moderators, the so-called butterfly 2 (BF2), that operates at a temperature of around 17K. In addition, a thermal- and pre-moderator, a Beryllium reflector, steel frames (or outer reflectors) and steel supporting structures, which cooled...
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Christopher McKay (UK Research and Innovation)15/04/2026, 09:30Oral Presentation
The drive to operate high power particle accelerators sustainably is becoming increasingly urgent. At the ISIS Neutron and Muon Source, current operations typically generate 100–200 tonnes of radioactive waste annually, but with a projected ~36,000 tonnes over the facility’s remaining lifecycle. Because radioactive waste severely constrains reuse and recycling, it represents a significant...
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Ping Wang (Institute of High Energy Physics, Chinese Academy of Sciences)15/04/2026, 09:30Oral Presentation
The neutron technology development station (NTDS) is China’s first time-of-flight cold and thermal neutron test beamline based on the China spallation neutron source. Positioned as a neutron technology incubator, it supports diverse neutron beam test research in areas such as materials, devices, methodologies, and metrology. In terms of physical design, the beamline employs a curved neutron...
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Dan Coates15/04/2026, 09:30Oral Presentation
At the heart of the ISIS Neutron and muon source, are target stations that use a 25-metre-long trolley system to transfer the TRaM from the centre of the monolith in the target station into a hot cell, referred to as the remote handling cell (RHC), for maintenance. This approach reduces the duration of maintenance shutdowns without the requirement to dismantle shielding and plant equipment to...
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QING ZHANG (CHINA)15/04/2026, 09:50Oral Presentation
The Neutron Technology Development Station (NTDS) at the China Spallation Neutron Source (CSNS) is a testing beamline dedicated to advancing neutron instrumentation and methodologies. This paper presents the design and application of its reflectivity measurement terminal, a versatile platform developed for high-precision neutron supermirror reflectometry. The terminal is equipped with multiple...
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Atefeh Sadeghzadeh (European Spallation Source ERIC)15/04/2026, 09:50Oral Presentation
The Contamination Alarm for Target (CAT) system ensures worker safety by detecting abnormal helium leaks from the ESS Target Primary Cooling System (TPCS) to the surrounding rooms where workers can be present, considering that the helium may be radiologically contaminated. When a leak is detected, the CAT system activates an alarm to warn personnel about the potential hazard and initiate...
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Melissa Collier15/04/2026, 09:50Oral Presentation
The ISIS Neutron Source uses ion exchange resins contained in shielded ion exchange columns (IECs) to control the coolant chemistry of the most radioactive parts of the ISIS machine- the target, reflector and moderator (TRaM) systems. The columns are replaced periodically, generating intermediate level waste (ILW).
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Legacy IECs from Target Station 1 (TS1) were transported away from RAL... -
Mina Akhyani (Jülich center for neutron sciences (JCNS))15/04/2026, 10:10Oral Presentation
The LvB project, Hungary’s first compact accelerator-based neutron source (CANS), is being developed by Mirrotron Ltd. and the HUN-REN Centre for Energy Research to support industrial applications such as reflectometry, diffraction, and BNCT. Currently, LvB operates with a 2.5 MeV pulsed proton beam on a lithium target at 1 mA average current.
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A future upgrade to 8 MeV proton energy aims to... -
Mr Iñigo Alonso, Lena Bystedt (Miriant AB)15/04/2026, 10:10Oral Presentation
Abstract. Engineering projects rely on formal review processes to support key decisions across project phases. These reviews are intended to provide confidence in system maturity and readiness contributing to decision quality, risk reduction, and defect detection yet they often require substantial effort in terms of time, coordination, and resources. This study explores whether the value...
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Roberto Bedogni (INFN-LNF)15/04/2026, 10:10Oral Presentation
The spectrometric characterisation of large‑scale neutron irradiation facilities is particularly challenging, as neutron energies can range from thermal energies to several hundred MeV. Bonner spheres (BS) have long been employed for their robustness, well‑established response and controlled uncertainties; however, they are not practical as real‑time monitors. Over the past decade, BS have...
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Mrs Naja de la Cour (European Spallation Source ERIC)15/04/2026, 11:00Oral Presentation
The rotating tungsten target at the European Spallation Source (ESS) is the first of its kind to be cooled by high-temperature gaseous helium. The cooling system, Target Helium Cooling System (THCS), is mainly comprising of the primary cooling loop and the associated pressure control and storage system. The primary cooling circuit incorporates gas circulators, heat exchangers and purification...
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Valentina Santoro (European Spallation Source ERIC)15/04/2026, 11:00Oral Presentation
The FINESSE (Fundamental Interactions with Neutrons at ESS) programme is a proposal for a versatile beamline at the European Spallation Source dedicated to fundamental particle physics. Building on the concept previously developed under the HIBEAM/NNBAR programme, FINESSE extends and generalises this approach into a multi-purpose facility combining high-flux and low-background capabilities...
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Kazim Raza Syed (European Spallation Source ERIC)15/04/2026, 11:20Oral Presentation
The ESS target is designed with three levels of defence in depth to allow for safe operation of the tungsten target with pulsed proton beams from the linac. Target Safety System (TSS) is a dedicated safety group system against radiological events acting in the last level. The target wheel rotation speed is one of the parameters monitored by TSS to trip the proton beam to target. The wheel is...
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Mila Myllymäki (University of Helsinki)15/04/2026, 11:20Oral Presentation
The ESS Chip Irradiation (ECHIR) beamline has been proposed at the European Spallation Source (ESS) to provide a high-flux, atmospheric-like neutron energy spectrum for Single Event Effect (SEE) testing. SEEs in microelectronics are mainly induced by high-energy atmospheric neutrons, which can cause significant functional disruptions in electronic systems. Fast neutrons can be used to simulate...
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Monika Hartl (European Spallation Source ERIC)15/04/2026, 11:20Oral Presentation
Concerns about material activation and degradation due to high radiation environments is a limiting factor for the lifetime of high-power spallation sources. This well-recognized fact has led to increased research efforts in finding the best materials for construction of ESS and understanding what happens with the materials on the atomic scale when exposed to a radiation field. Now that the...
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Anton Lundmark (European Spallation Source ERIC), Dr Jaime Arriagada (ESS ERIC)15/04/2026, 11:40Oral Presentation
The scope of the target station is to host the spallation process where protons from the accelerator are used to produce neutrons. Futhermore, these neutrons has to be moderated to useful energies, and be delivered to the neutron instruments with high efficiency. The parts of the target station directly involved in the neutron spallation are referred to as the neutron factory, thus the neutron...
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Evan Foy (European Spallation Source ERIC), Kristoffer Sjögreen (European Spallation Source ERIC)15/04/2026, 11:40Oral Presentation
The Target component of the European spallation source is a heavy 2.6m diameter wheel that rotates at 23.3rpm. The target is supported by rotating machinery that includes an 8m tall rotor, a multi-functional drive unit, a vacuum feedthrough seal and a rotary seal interface to a powerful helium cooling system. This complex mechanical system is equipped with many monitoring functions to record...
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Erik Iverson (Oak Ridge National Laboratory)15/04/2026, 11:40Oral Presentation
Oak Ridge National Laboratory operates the Spallation Neutron Source (SNS), which provides high-intensity slow neutron beams for a variety of condensed matter, engineering, and basic physics applications with a 2 MW 1.3 GeV proton beam incident on a mercury target. The fast neutrons produced in the target must be efficiently moderated to low energies via moderators, sometimes called cold...
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Gabriele Sala (J-PARC, Material Life and Sciences Division)16/04/2026, 09:10Oral Presentation
Modern neutron scattering facilities face increasing complexity in instrument design, experimental planning, and data analysis. This presentation introduces the ongoing initiative at the Japan Proton Accelerator Research Complex (J-PARC) to develop a dedicated Digital Twin for its entire suite of neutron instruments.
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By creating high-fidelity virtual replicas of the beamlines, we integrate... -
Fernando Sordo Balbín (ESS Bilbao)16/04/2026, 09:10Oral Presentation
High-current accelerator-driven neutron sources (HiCANS) are proposed to fill the gap in European neutron production left by the progressive shutdown of research reactors. The ARGITU project is one of these initiatives: it aims to establish a regional, accelerator-driven neutron facility in the Basque Country whose final objective is to operate a low-energy, high-current proton accelerator...
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Mark Telkman (Science and Technology Facilities Council)16/04/2026, 09:10Oral Presentation
In the ISIS Neutron and Muon Source Target Station 2, a decoupled solid methane moderator is used to convert fast neutrons coming from the target into cold, lower energy neutrons, due to its high efficiency compared to liquid hydrogen moderators. The operational temperature of the solid methane moderator is kept to 47K [1] using a helium cooling loop inside the methane vessel. However, it has...
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Erik Iverson (Oak Ridge National Laboratory)16/04/2026, 09:30Oral Presentation
We present the design and experiences with a real-time monitor, based on Raman spectroscopy, for tracking the orthohydrogen fraction in an operating liquid hydrogen moderator loop on a neutron source. This diagnostic probes the hydrogen through transparent windows, without crossing the hydrogen boundary. It can track orthohydrogen levels as low as 0.15%, enabling confirmation of full...
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Matthew Frost (Oak Ridge National Laboratory)16/04/2026, 09:30Oral Presentation
Neutron Scattering Instrument design at World-class facilities has become a resource intensive task that leverages effort across a large number of people with varied expertise and knowledge. Throughout the different design phases of a proposed instrument, we know that many iterations occur between the instrument staff, optics designer, shielding analysts and engineers. This is due to the high...
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Paul Zakalek (Forschungszentrum Jülich GmbH)16/04/2026, 09:30Oral Presentation
High-Current Accelerator-driven Neutron Sources (HiCANS) represent a cost-efficient and scientifically attractive complement to fission reactors and spallation sources, combining brilliant neutron beams with low radiation background, a flexible pulse structure, and straightforward user access.
The High Brilliance Neutron Source Phase I (HBS-I) is a proposed HiCANS user facili-ty to be...
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Juping Xu16/04/2026, 09:50Oral Presentation
Neutron total scattering, which combining Bragg diffraction with pair distribution function (PDF) analysis, is a powerful technique for probing multiscale structural features such as short-range order, amorphous phases, nanocrystallinity, and interfaces. Advances in neutron sources and instrumentation have led to improved data processing strategies, enhancing both data quality and...
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Yannick Beßler (Forschungszentrum Jülich)16/04/2026, 09:50Oral Presentation
The European Spallation Source (ESS) in Lund, Sweden, is designed to become the most powerful accelerator-driven spallation neutron source in the world. ESS is currently under construction and the first beam on target is planned for the second half of 2026, with first user operation expected to start in 2027. As a key component of neutron production, which was developed at the Institute of...
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Frederic OTT (IRAMIS/Laboratoire Léon Brillouin CEA/CNRS, Université Paris-Saclay.)16/04/2026, 09:50Oral Presentation
The CEA and CNRS institutes in France are currently working on the Technical Design Phase of ICONE, a new HiCANS, High-Current Accelerator-driven neutron source. The goal is to equip France with a new neutron source by the early 2030s. This source would provide 10 to 12 neutron scattering instruments to the French community. The source is using a 25 MeV proton accelerator operating in pulsed...
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Theodoros Vasilopoulos (European Spallation Source (ERIC))16/04/2026, 10:10Oral Presentation
At the European Spallation Source (ESS), a 5 MW beam of 2 GeV proton with a normal current of 62.5 mA is accelerated by a linear accelerator and is directed onto a rotating tungsten target at a repetition of 14 Hz and a pulse length of 2.86 ms. High-energy spallation neutrons are subsequently moderated to cold and thermal neutrons using a combination of two hydrogen moderators and a thermal...
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Shuqi Xu (ESS & Lund University)16/04/2026, 10:10Oral Presentation
The open-source toolkit NCrystal provides the scattering physics of low-energy neutrons for a variety of materials, including single- and poly-crystals, amorphous solids, liquids and gases. Additionally, NCrystal supports the plugin feature for implementing custom physical models. Furthermore, it can be used as a backend by Monte Carlo codes to model neutron scattering experiments. These...
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Antonino Pietropaolo (ENEA Frascati Research Centre-Nuclear technologies Laboratory)16/04/2026, 10:10Oral Presentation
The SORGENTINA program aims at developing accelerator-driven fusion neutron sources based on deuterium–tritium (D-T) reactions for applications in nuclear medicine, materials science, and fusion technology. The plant will rely on a mixed deuterium and tritium ion beam accelerated to energies of about 300 keV and directed onto titanium-coated rotating targets, producing nearly monochromatic 14...
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Franz Gallmeier (Oak Ridge National Laboratory)16/04/2026, 11:00Oral Presentation
The inner reflector plug (IRP) at SNS, hosting moderators and reflectors, is an essential complex in delivering desired neutron pulses to all the instruments. The lengthy and complicated manufacturing process usually means a well advanced but very short window for physics and engineering design. Currently SNS just starts operating its third IRP (IRP-III), the fourth IRP (IRP-IV) is under...
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Nicholas Evans (Oak Ridge National Laboratory)16/04/2026, 11:00Oral Presentation
The Proton Power Upgrade (PPU) project at Oak Ridge National Lab’s Spallation Neutron Source (SNS) increased the accelerator capability from 1.4 to 2.8 MW through an 30% increase in energy to 1.3 GeV, and a 50% increase in charge per pulse. A new target design was also produced that allows the first target station to reach a maximum 2.0 MW. An additional 700 kW is reserved for the future...
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Prof. Zhijia Sun (Spallation Neutron Source Science Center)16/04/2026, 11:00Oral Presentation
Neutron imaging is a pivotal non-destructive testing technique for scientific and industrial fields. This report summarizes the progress of neutron imaging detector research in China Spallation Neutron Source (CSNS), focusing on four major directions: high spatial resolution, energy- resolved, large field of view (FOV), and compact imaging detectors.
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To meet the demand for micron-scale... -
Dusan Kral (Los Alamos National Laboratory, Physics Division)16/04/2026, 11:20Oral Presentation
Accurate neutron beam profiling and position verification are required for alignment, improvement of signal-to-noise, and imaging development, yet are often performed with single-use beam-imaging media that provide only integrated exposure and limited real-time feedback. We present a first analysis of neutron imaging data from the Device for Indirect Capture Experiments on Radionuclides...
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Lukas Zavorka (Oak Ridge National Laboratory)16/04/2026, 11:20Oral Presentation
The Second Target Station (STS) of the Oak Ridge National Laboratory’s (ORNL) Spallation Neutron Source (SNS) is designed to become the highest peak brightness source of cold neutrons in the world. Neutrons will be generated via spallation of a rotating tungsten target induced by a short-pulsed 1.3 GeV, 700 kW proton beam from the upgraded SNS linac. Neutrons will slow down to cold energies in...
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Yuji Yamaguchi16/04/2026, 11:20Oral Presentation
J-PARC is a multipurpose experimental facility and has high intensity proton accelerators of a linac, a 3-GeV rapid cycling synchrotron (RCS), and a 30-GeV synchrotron. The linac and the following RCS provide a high power proton beam for driving muon and neutron sources at Materials and Life Science Experimental Facility (MLF) through a 300-m-long beam transport line. In 2024, long-term high...
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Cyrille Thomas (European Spallation Source ERIC)16/04/2026, 11:40Oral Presentation
Proton beam instrumentation in the target area is designed to support both beam tuning and machine protection. By measuring key beam properties—such as beam 2D profile on a pulse-by-pulse basis and from which size and position are extracted, as well as intra-pulse characteristics including beamlet size and position—the instrumentation suite enables precise achievement of nominal beam...
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Bin Zhou (China Spallation Neutron Source)16/04/2026, 11:40Oral Presentation
The China Spallation Neutron Source (CSNS) achieved its first neutron production in August 2017 and currently operates at an average beam power of 185 kW. During operation, experimental measurements have been performed to the three neutron moderators, and the results have validated the reliability of the Target-Moderator-Reflector (TMR) physical design. Owing to the outstanding operational...
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Bin TANG (Institute of High Energy Physics, Chinese Academy of Sciences)16/04/2026, 11:40Oral Presentation
The China Spallation Neutron Source (CSNS) is a multidisciplinary user facility requiring large quantities of position-sensitive neutron detectors for scattering and imaging instruments. To mitigate the global shortage and cost of 3He, CSNS has developed and deployed multiple generations of large-area scintillator neutron detectors.
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The first-generation system uses 6LiF/ZnS(Ag) scintillation... -
Franz Gallmeier (Oak Ridge National Laboratory)16/04/2026, 13:30Oral Presentation
After more than 10 years of use of the present code version, the AARE [1] framework for
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conducting activation analyses of accelerator driven systems is being reworked to continue
to support analysis workflows in concert with the MCNP [2] multi-particle transport code.
The presentation focuses on the data library eMort.
To meet the expansion of the MCNP6 code, which includes transport cross... -
Sara Ghatnekar Nilsson (European Spallation Source ERIC)16/04/2026, 13:30Oral Presentation
This work presents an overview of the main project activities and the outcomes of the final tests carried out to qualify the Proton Beam Window (PBW) for ESS operation. The last-stage verification steps and acceptance results that completed the component’s readiness for ESS commissioning and operation are described, as well as the results after the installation at ESS
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Stephen Gallimore (UKRI - STFC)16/04/2026, 13:30Oral Presentation
Authors: S. Gallimore, D. Coates, L. Jones, M Probert & C. Russell
Institution: ISIS Neutron and Muon Source, STFC, UKRIThe operational lifetime of the tantalum clad tungsten target used on Target Station 2 (TS2) [1] at the ISIS Neutron and Muon Source remains below the performance originally specified during facility construction, despite sustained development efforts over the past two...
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Dominic Schori (Paul Scherrer Institut)16/04/2026, 13:50Oral Presentation
To increase the ultracold neutron yield at the UCN source at PSI, a new design of the solid deuterium moderator vessel was developed within the frame of a major refurbishment project called ‘UCN EZE’. In addition to the improvements of the cold moderator, the project includes the replacement of the entire central insertion unit, which consists of several components, such as a central shutter,...
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Hossein Sina (European Spallation Source ERIC)16/04/2026, 13:50Oral Presentation
The European Spallation Source (ESS) is transitioning from construction to commissioning, with many components delivered through in-kind contributions. This introduces challenges in verifying material compliance and ensuring suitability for radiation environments. To address this, the Spallation Physics group has established a centralised materials engineering and characterisation function....
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Takafumi Tsujimoto (Tohoku University)16/04/2026, 13:50Oral Presentation
For accelerator-based neutron sources, a moderator is one of the most important components determining the performance of the neutron beams produced. The neutron scattering cross section data for the moderator materials in the thermal and cold neutron energy region are utilized in the neutronics calculation for the development and improvement of moderator systems. To develop a reliable data...
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Mr Lennart Åström (ESS)16/04/2026, 14:10Oral Presentation
See attached file
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Lina Quintieri (ISIS-RAL-STFC)16/04/2026, 14:10Oral Presentation
This work presents a comprehensive assessment of radiation damage and transmutation gas production in the upgraded operating target of the ISIS Target Station 1 (TS1) spallation neutron source under irradiation, using the FLUKA Monte Carlo code. Previous benchmarking activities have validated the FLUKA model of the ISIS TS1 Target Reflector and Moderator (TRAM) assembly against measurable...
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Franz Gallmeier (Oak Ridge National Laboratory)16/04/2026, 14:10Oral Presentation
As water circulates through the core vessel of spallation neutron systems, it becomes radioactive due to spallation and transmutation reactions induced by high-energy protons, neutrons, and other particles. The activated coolant then flows through secondary components, such as pipes, tanks, and pumps, located outside of the core vessel. These secondary components require adequate shielding to...
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Dr Tucker McClanahan (Oak Ridge National Laboratory)16/04/2026, 14:50Oral Presentation
In the designing a high-power tungsten target, such as the one being designed
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at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source
(SNS) Second Target Station (STS), a thorough understanding of decay heat
driven temperature rise is crucial for ensuring safety during maintenance peri-
ods and loss-of-coolant accidents (LOCA). Tungsten, when exposed to steam
at temperatures... -
JORGE GARCIA TORTOSA16/04/2026, 14:50Oral Presentation
ESS Bilbao reports the mechanical design and manufacturing preparation for a spectrometer vacuum vessel intended for installation in the STS. Work progressed from the conceptual stage to a final 3D model submitted for the Preliminary Design Review (PDR), supported by a comprehensive programme of mechanical verification and manufacturing studies. The mechanical verification comprised extensive...
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Aaron Jacques16/04/2026, 14:50Oral Presentation
The Second Target Station (STS) project is advancing a next-generation spallation target assembly to meet demanding performance, availability, and maintainability requirements. This presentation highlights the current STS Target Assembly design with emphasis on the structural concept, materials of construction, joining and fabrication approaches, and the analysis methods used to manage cyclic...
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Larissa P. Cunico16/04/2026, 15:10Oral Presentation
The European Spallation Source (ESS), currently under construction in Lund, Sweden, is a multidisciplinary research facility built around the world’s most powerful neutron source. One of the key operational systems in the Target Station is the Radiolysis Gas Treatment System (RGTS), which is designed to control the accumulation of radiolysis and spallation gases generated in the Target Station...
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Weiliang Cai (China Spallation Neutron Source)16/04/2026, 15:10Oral Presentation
The Fermi chopper serves as the core key equipment of the high-energy inelastic neutron scattering spectrometer at the China Spallation Neutron Source (CSNS), and its technical performance directly determines the energy resolution of the spectrometer. At present, the spectrometer is equipped with a Fermi chopper applicable only to the low-energy range, which leads to obvious limitations in...
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Margherita Simoni (Physics Department, Università degli Studi di Roma Tor Vergata, via della Ricerca Scientifica 1, 00133, Roma, Italy)16/04/2026, 15:10Oral Presentation
The accurate knowledge of the neutron transport in air is particularly relevant for the optimized design of instrumentation, beam lines and shielding components, used for research, radioprotection or clinical applications. To simulate neutron transport and estimate dose delivery, Monte Carlo simulations are currently one of the most popular tools. Neutron transport simulations often rely on...
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Lukas Zavorka (Oak Ridge National Laboratory)16/04/2026, 15:30Oral Presentation
This paper demonstrates the application of SAMMY user-defined resolution function at the spallation neutron sources. SAMMY, a multilevel R-matrix fitting code for neutron data using Bayes' equations, has recently introduced a new format of the resolution function that describes the energy spread of neutrons at a detector due to the convolution of several effects. These effects include the time...
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Josef Svoboda (LANL)16/04/2026, 15:30Oral Presentation
This contribution reports on the installation of a 100 µm testing neutron collimator for transmission measurements on the Device for Indirect Capture Experiments on Radionuclides (DICER) at the Los Alamos Neutron Science Center (LANSCE). The move toward smaller collimation is driven by radiological risk management: for experiments involving highly activatable or radioactive materials, reducing...
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Anna Bieliaieva (European Spallation Source ERIC)16/04/2026, 15:30Oral Presentation
The European Spallation Source (ESS) is a multi-disciplinary research facility based on neutron source located in Lund, Sweden. The ESS consists of three main parts: a linear proton accelerator, target and neutron science instruments. Target HVAC system plays a critical role in ensuring the process and safety of neutron production. Its functions include the following:
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- Radiation Safety: the... -
Chaoju Yu (Institute of High Energy Physics, Chinese Academy of Sciences)16/04/2026, 15:50Oral Presentation
The moderator-reflector system of the CSNS target station has been operating continuously for 8 years without any failure. In the CSNS-II project, the MR plug will be replaced as a whole. At present, the design and manufacturer selection of all key components of the MR plug have been completed, and the research and development of all key process technologies have also been finished. All...
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David Newman (Los Alamos National Laboratory)Oral Presentation
Please see the attached abstract.
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