TOPAZ monitor position

[Andrei Savici]

The monitor before the sample should be at about -2.57m instead of -4.45. To test:

LoadNexusMonitors(Filename='TOPAZ_7892_event.nxs',OutputWorkspace='TM')
ConvertUnits(InputWorkspace='TM',OutputWorkspace='TMOrigK',Target='Momentum')
Rebin(InputWorkspace='TMOrigK',OutputWorkspace='TMOrigK',Params='0.2,0.01,5',PreserveEvents='0')

MoveInstrumentComponent(Workspace='TM',ComponentName='monitor1',Z='-2.57',RelativePosition='0')
ConvertUnits(InputWorkspace='TM',OutputWorkspace='TMNewK',Target='Momentum')
Rebin(InputWorkspace='TMNewK',OutputWorkspace='TMNewK',Params='0.2,0.01,5',PreserveEvents='0')

Load(Filename='TOPAZ_7892_event.nxs',OutputWorkspace='TOPAZ_7892_event')
ConvertUnits(InputWorkspace='TOPAZ_7892_event',OutputWorkspace='TOPAZ_7892_event',Target='Momentum')
Rebin(InputWorkspace='TOPAZ_7892_event',OutputWorkspace='TOPAZ_7892_event',Params='0.2,0.01,5',PreserveEvents='0')
SumSpectra(InputWorkspace='TOPAZ_7892_event',OutputWorkspace='sum')

Spectra for monitor 1,2, and the sum over all detectors should start at the same position in k (or lambda). Ignore the prompt pulse, that should be in different position.

[Peter Peterson]

Xioping did a different calculation/calibration that puts it at 2.488m (engineering is 2.55m).

[Peter Peterson]

Re #8650. Moving TOPAZ monitor for all versions of the instrument.

Changeset: 57bb28ccc1db4080b1cf386e308a8d67c422af8c

[Peter Peterson]

This is on ​bugfix/8650_topaz_mon_distance.

To test: This is really just looking at the source code changes. The monitor at 4.45m should now be at 2.488m.

[Peter Peterson]

Re #8650. Moving TOPAZ monitor for all versions of the instrument.

Changeset: cdf18ba897caddfa837a3df5285f53125face962

[Andrei Savici]

Merge remote-tracking branch 'origin/bugfix/8650_topaz_mon_distance'

Full changeset: ​0d6cc28557ec106146ff1ab016c7965159eff5f3

[Stuart Campbell]

This ticket has been transferred to github issue ​9494