Signed Theta Test

[Owen Arnold]

The following is a useful check that signed-theta values are being calculated correctly for the instrument, and should be converted into system or unit tests.

import os
import math
import numpy as np

def echo_signed_theta(idf_name, detector_vertical_position, detector_name = 'point-detector'):
        idf_dir=config['instrumentDefinition.directory']
        I=LoadEmptyInstrument(os.path.join(idf_dir, idf_name))

        ref_frame = I.getInstrument().getReferenceFrame()
        
        print I.getInstrument().getStringParameter('show-signed-theta')

        movements = dict()
        movements[ref_frame.pointingUpAxis()] = detector_vertical_position
        movements[ref_frame.pointingAlongBeamAxis()] = 0
        movements[ref_frame.pointingHorizontalAxis()] = 0

        MoveInstrumentComponent(Workspace=I,ComponentName=detector_name,**movements)
                
        theta_spectrum_axis=ConvertSpectrumAxis(InputWorkspace=I,OutputWorkspace='SignedTheta_vs_Wavelength',Target='signed_theta')
                
        detector = theta_spectrum_axis.getInstrument().getComponentByName(detector_name)
        print theta_spectrum_axis.detectorTwoTheta(detector), theta_spectrum_axis.detectorSignedTwoTheta(detector)
        
echo_signed_theta('INTER_Definition.xml', 1)
echo_signed_theta('INTER_Definition.xml', -1)

echo_signed_theta('CRISP_Definition.xml', 1)
echo_signed_theta('CRISP_Definition.xml', -1)

echo_signed_theta('POLREF_Definition.xml', 1)
echo_signed_theta('POLREF_Definition.xml', -1)

echo_signed_theta('SURF_Definition.xml', 1)
echo_signed_theta('SURF_Definition.xml', -1)

[Nick Draper]

bulk move to assigned at the into of the triage step

[Stuart Campbell]

This ticket has been transferred to github issue ​9696