canSAS-XI/TOFSANS: Difference between revisions
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=== Session Notes === | === 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 === | === Actions === | ||
- Formation of a TOF-SANS working group : AJJ | - Formation of a TOF-SANS working group : AJJ | ||
Latest revision as of 20:46, 9 July 2019
Chair : Andrew Jackson
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
