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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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