Ticket #851 (closed: fixed)

Opened 11 years ago

Last modified 5 years ago

SofQW algorithm

Reported by: Nick Draper Owned by: Russell Taylor
Priority: major Milestone: Iteration 22
Component: Keywords:
Cc: Blocked By:
Blocking: Tester:

Description

For inelastic scattering, the existing algorithms produce a workspace in which each histogram is in energy transfer for a constant angle. The Q value of a bin varies as a function of its energy. We need an algorithm that converts the workspace into S(Q,energy). The user would provide the Q,energy grid structure ie number of bins & size of Q & energy. The current program, loops thru all bins & histograms calculating the Q value & populating the S(Q,w) grid.

Change History

comment:1 Changed 11 years ago by Nick Draper

Inputs: Input workspace Energy bin params : a param string as used in rebin alg Q bin params : a param string as used in rebin alg Output workspace name

Processing: The data would be regridded and output as a workspace with axes of energy and modulus of Q. Question: What is S? Is it simply the rebinned counts? Should it be counts/QE?

comment:2 Changed 11 years ago by Nick Draper

Response from Spencer:

Inputs: Input workspace > yes Energy bin params : a param string as used in rebin alg > yes Q bin params : a param string as used in rebin alg > yes Output workspace name > yes

the rebin params for Q & energy may be in a range less than the input values and some bins may get zero counts

Processing: The data would be regridded and output as a workspace with axes of energy and modulus of Q. > yes Question: What is S? Is it simply the rebinned counts? > yes (sorry, my neutron scattering terminology) Should it be counts/QE? > probably yes

comment:3 Changed 11 years ago by Nick Draper

  • Owner set to Russell Taylor

comment:4 Changed 11 years ago by Russell Taylor

(In [3243]) Some tidying up to aid in the writing of a new algorithm. Re #851.

comment:5 Changed 11 years ago by Russell Taylor

  • Status changed from new to assigned

comment:6 Changed 11 years ago by Russell Taylor

(In [3246]) Restoration of AWOL 'Browse' button. Re #851.

comment:7 Changed 11 years ago by Russell Taylor

(In [3248]) Finally get out of a foolish hole that I dug for myself... Re #851.

comment:8 Changed 11 years ago by Russell Taylor

(In [3250]) Fix test. Re #851.

comment:9 Changed 11 years ago by Russell Taylor

(In [3251]) Fixes for PropertyWithValueTest and qtiplot build. Re #851.

comment:10 Changed 11 years ago by Russell Taylor

(In [3252]) Another test fix. Re #851.

comment:11 Changed 11 years ago by Russell Taylor

(In [3300]) Factor out function for creating an axis from a set of rebin parameters. Re #851.

comment:12 Changed 11 years ago by Russell Taylor

  • Status changed from assigned to accepted

comment:13 Changed 11 years ago by Russell Taylor

(In [3947]) Add processed IRIS files used in system tests. Re #851.

comment:14 Changed 11 years ago by Russell Taylor

(In [3948]) Add algorithm to create S(Q,w) workspace. Re #851.

comment:15 Changed 11 years ago by Russell Taylor

(In [3951]) Expand SofQWTest. Re #851.

comment:16 Changed 11 years ago by Russell Taylor

(In [3952]) VS project file updates. Re #851.

comment:17 Changed 11 years ago by Russell Taylor

(In [3972]) Update SofQW to output a distribution if that's what the input workspace was. Re #851.

comment:18 Changed 11 years ago by Russell Taylor

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

comment:19 Changed 11 years ago by Steve Williams

  • Status changed from testing to closed

comment:20 Changed 5 years ago by Stuart Campbell

This ticket has been transferred to github issue ​1699

Note: See TracTickets for help on using tickets.