Ticket #2351 (closed: fixed)

Opened 10 years ago

Last modified 5 years ago

EQSANS: disantangle beam profile from transmission measurement

Reported by: Mathieu Doucet Owned by: Mathieu Doucet
Priority: major Milestone: Iteration 29
Component: Mantid Keywords:
Cc: Blocked By:
Blocking: Tester: Steve Williams

Description

The current way of measuring the transmission for EQSANS is to measure counts through a small hole in the beam stop (as per JK's code). This measures the attenuated beam flux phi(lambda)*T(lambda). When dividing by phi*T, we also take care of the beam spectrum normalization. But this means that we _can't_ use the theta-dependent transmission correction. We should take the beam profile out of the transmission measurement and fold it into the normalization step.

Change History

comment:1 Changed 10 years ago by Mathieu Doucet

(In [9110]) Sanitizing EQSANS commands. Re #2351.

comment:2 Changed 10 years ago by Mathieu Doucet

(In [9122]) Dark current subtraction should come before normalization. Re #2351.

comment:3 Changed 10 years ago by Mathieu Doucet

(In [9123]) Fix test according to todays change for transmission normalization. Re #2351.

comment:4 Changed 10 years ago by Mathieu Doucet

(In [9124]) This should fix the failing system test. Re #2351

comment:5 Changed 9 years ago by Nick Draper

  • Milestone changed from Iteration 28 to Iteration 29

Bulk move of tickets at the end of iteration 28

comment:6 Changed 9 years ago by Mathieu Doucet

  • Status changed from new to accepted

comment:7 Changed 9 years ago by Mathieu Doucet

  • Status changed from accepted to verify
  • Resolution set to fixed

(In [12357]) Fixes #2351

comment:8 Changed 9 years ago by Janik Zikovsky

  • Status changed from verify to verifying
  • Tester set to Janik Zikovsky

comment:9 Changed 9 years ago by Janik Zikovsky

  • Status changed from verifying to verify
  • Tester Janik Zikovsky deleted

Don't know how to test this.

comment:10 Changed 9 years ago by Steve Williams

  • Status changed from verify to verifying
  • Tester set to Steve Williams

comment:11 Changed 9 years ago by Steve Williams

  • Status changed from verifying to closed

saw a change in the Normalize ReductionStep which seems to be working

comment:12 Changed 5 years ago by Stuart Campbell

This ticket has been transferred to github issue 3198

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