canSAS-XI/TOFSANS

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(Session Notes)
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Jansk presentation
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Jaksch presentation
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* Angular resolution
 
* Angular resolution
 
* Wavelength resolution
 
* Wavelength resolution

Revision as of 16:45, 9 July 2019

Chair : Andrew Jackson

Contents

Presentations

Session Plenary overview : TOF-SANS Blessing or Curse?

Judith Houston : LoKI Detectors

Sebastian Jaksch :

Anna Sokolova : Experiences from Bilby

Session Notes

Houston presentation


  • 4 layers of Cu tubes, each containing 7 10-B straws
  • Simulated in McStas+GEANT4 > Mantid
  • Issues:
    • Can’t survey in pixels
    • Parallax because of depth
    • Differential efficiencies/self-screening
    • Sheer number of pixels (10M)

Andrew Jackson: But can readout each individual straw!

Brian Pauw: Will probably need angle-dependent pixel efficiency maps? Could also use Bragg peaks at known positions on different detectors to back-calculate wavelength if d-spacing known?

Adrian Rennie: And what about relative efficiencies? There will be a huge amount of information in detector calibration file!


Jaksch presentation


  • Angular resolution
  • Wavelength resolution
  • Issues:
    • Measurement of distance
    • Measurement of openings
    • Measurement of angles
    • Measurement of relative time (cables lengths)
    • Measurement of absolute time (moderator emission time)
    • Measurement of Qmin
    • Measurement of intensities
  • Standards
    • Reproducibility
    • Durability
    • Reliability

Summary

- Need to better understand flood calibrations, and run comparisons - Investigate nanostructured porous materials as Q calibrants - Need to use better descriptions of resolution - Need better handling of multiple scattering

Actions

- Formation of a TOF-SANS working group : AJJ

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