CANSAS Resolution Workshop

25 Mar 2021, 13:00 → 26 Mar 2021, 18:30 Europe/Stockholm

Zoom

In order to maximise the information extracted from SAS data, it is important to have a well characterized resolution function for the instrument and measurement conditions used. The combination of geometric (collimation, detection element size) and wavelength components in quadrature to produce a gaussian representation of the resolution at each Q value is well known, and widely used. However, there are a number of areas that have emerged where this representation does not adequately describe the measured data.

The Data Formats Working Group of canSAS is holding a workshop via video conference on the 25th and 26th March, 2021 to discuss SAXS/SANS resolution and in particular address the following points:

• Resolution close to Q=0 / close to the beamstop
• Effect on resolution of non-gaussian beam shapes / structure in the beam profile
• Non-infinite slit geometries – e.g. VSANS

The workshop will address the questions by breaking them down into four areas:

1. CALCULATE : Can we calculate these effects? First principles, approximations, simulations.
2. MEASURE : How can we measure the resolution functions? Standard samples, measurement strategies.
3. ANALYSE : How do we apply these resolution effects into our data analysis? What information is needed by analysis software? How do we determine what is appropriate usage of these effects?
4. STORE : How can we represent the resolution functions and store the data in a manner that can be used for analysis?

Talks

• CANSAS_2021_Resolution_Charles.pdf
• Current status of resolution functions for slit geometries - Bonse-Hart Jan.pptx
• Multiple Scattering ESS.pdf
• Narrow_Slit_Smearing.pptx
• tof_SANS_resolution_25Mar2021_RKHeenan.pdf

Thursday, 25 March

Plenary: Introduction

Convener: Andrew Jackson (European Spallation Source ERIC)

Plenary: Numerical evaluation, convolution and recombination of SANS instrument resolution using real-shape kernels

Convener: Charles Dewhurst (Institut Laue Langevin)

Plenary: Q resolution in time-of-flight-SANS

Convener: Richard Heenan (ISIS, STFC)

14:35 Break

Break-out sessions: CALCULATE, MEASURE

2021-03 - STORE Handout.pdf

CanSAS_Resolution_Workshop_Sessions.pptx

Friday

STORE (Paul): https://jamboard.google.com/d/1tbzvwVjGi-UKET1zm04GXIsQR1cvp1xfpZ9Pq2eh7go

STORE (Jan): https://jamboard.google.com/d/1zIlnDS0guteH4EtWJ9Gl_9QcIyo932BHqbvDtWlCQtI

STORE (Tim): https://jamboard.google.com/d/1NCvBqtjOburwvuOa2SZrghGGM5d13sr70D2FqvpLgZ8

ANALYSE (Richard): https://jamboard.google.com/d/10GNk8dU8EGZUGLQMMrg85SYpjIU8DOLXMeHWTyFrBio

ANALYSE (Yun): https://jamboard.google.com/d/1zbOJeOf2pm7VgILzVddSAfNrrQgvvPfrPNHrzolTjKo

ANALYSE (Wojciech): https://jamboard.google.com/d/1drFzx0wwmiZIISz4CctKvwDMJRCLjkq1QCxsu9AncrU

STORE (Parallel): https://jamboard.google.com/d/1ah0uAI9lWNXCOh-Ov98P_Hy79iNq_GbRKsEqExjBNMQ

ANALYSE (Parallel): https://jamboard.google.com/d/1RbdzWrWiBqIHhIMIAfjf_mcFRhtQEtLpXAl_vKIpsg8

Action Items (Draft): https://jamboard.google.com/d/1u3Id5lBkLGx9bMRQw0rtHv6Cz_WdGP16TRLxfdpRJFs

 

Thursday

Calculate (Charles) : https://jamboard.google.com/d/1pcPbkBMY2PeyVcD1RXCj44tgIt_mHpFTqi7LfLRkwOs

Calculate (Andrew) : https://jamboard.google.com/d/1GpnXcQVyj1jaHJ8wRXIHHZNBZuimZngRJ8O7emwU4GA

Calculate (Yun): https://jamboard.google.com/d/1z89VllHSmac5_ObWUxJweNV9ApqIwsVwpVK8pPz20dM

Measure (Adrian): https://jamboard.google.com/d/1jdU1kyIiLQW5d79nv5nveg1tHbjMVOff_8qcBkLm83A

Measure (Judith) : https://jamboard.google.com/d/1wgWtl5lrhD5bqExcwzc2OQGKH9Fc09AAX-aLGhlVi5g

Measure (John): https://jamboard.google.com/d/17XYm8YlnbSz7mtE0T8umKNCKrR2W_juApMwT_W_o48w

Calculate https://jamboard.google.com/d/17EjD50D6Qj7Z6zI7F_UfYtNU7E49kVAn0CrC-ZZFUdg

Measure: https://jamboard.google.com/d/1x3dgB1nKx_murzcJrNU5QPBkKrjJ2aTz6ATCEYYEQvY

 

 

Friday, 26 March

Plenary: Current status of resolution functions for slit geometries including Bonse-Hart and VSANS systems

Conveners: Jan Ilavsky (APS), John Barker (NIST)

Plenary: Methods that involve 2d-Fourier transformations in SANS: multiple scattering and instrumental resolution

Convener: Henrich Freilinghaus (FZJ)

Plenary: NXcanSAS and resolution – Resolved?

Convener: Tim Snow (DLS)

14:35 Break

Break-out sessions: ANALYSE, STORE

2021-03 - STORE Handout.pdf

CanSAS_Resolution_Workshop_Sessions.pptx

Friday

STORE (Paul): https://jamboard.google.com/d/1tbzvwVjGi-UKET1zm04GXIsQR1cvp1xfpZ9Pq2eh7go

STORE (Jan): https://jamboard.google.com/d/1zIlnDS0guteH4EtWJ9Gl_9QcIyo932BHqbvDtWlCQtI

STORE (Tim): https://jamboard.google.com/d/1NCvBqtjOburwvuOa2SZrghGGM5d13sr70D2FqvpLgZ8

ANALYSE (Richard): https://jamboard.google.com/d/10GNk8dU8EGZUGLQMMrg85SYpjIU8DOLXMeHWTyFrBio

ANALYSE (Yun): https://jamboard.google.com/d/1zbOJeOf2pm7VgILzVddSAfNrrQgvvPfrPNHrzolTjKo

ANALYSE (Wojciech): https://jamboard.google.com/d/1drFzx0wwmiZIISz4CctKvwDMJRCLjkq1QCxsu9AncrU

STORE (Parallel): https://jamboard.google.com/d/1ah0uAI9lWNXCOh-Ov98P_Hy79iNq_GbRKsEqExjBNMQ

ANALYSE (Parallel): https://jamboard.google.com/d/1RbdzWrWiBqIHhIMIAfjf_mcFRhtQEtLpXAl_vKIpsg8

Action Items (Draft): https://jamboard.google.com/d/1u3Id5lBkLGx9bMRQw0rtHv6Cz_WdGP16TRLxfdpRJFs

 

Thursday

Calculate (Charles) : https://jamboard.google.com/d/1pcPbkBMY2PeyVcD1RXCj44tgIt_mHpFTqi7LfLRkwOs

Calculate (Andrew) : https://jamboard.google.com/d/1GpnXcQVyj1jaHJ8wRXIHHZNBZuimZngRJ8O7emwU4GA

Calculate (Yun): https://jamboard.google.com/d/1z89VllHSmac5_ObWUxJweNV9ApqIwsVwpVK8pPz20dM

Measure (Adrian): https://jamboard.google.com/d/1jdU1kyIiLQW5d79nv5nveg1tHbjMVOff_8qcBkLm83A

Measure (Judith) : https://jamboard.google.com/d/1wgWtl5lrhD5bqExcwzc2OQGKH9Fc09AAX-aLGhlVi5g

Measure (John): https://jamboard.google.com/d/17XYm8YlnbSz7mtE0T8umKNCKrR2W_juApMwT_W_o48w

Calculate https://jamboard.google.com/d/17EjD50D6Qj7Z6zI7F_UfYtNU7E49kVAn0CrC-ZZFUdg

Measure: https://jamboard.google.com/d/1x3dgB1nKx_murzcJrNU5QPBkKrjJ2aTz6ATCEYYEQvY

 

 

1 Closeout session