Describe the bug
For his project, KU BSc. student Christian Thyssen on optimising V-calibration sample geometry for CAMEA, lots of validation work was done. In the process an asymmetry in northern vs. southern hemisphere in PSD_monitor_4PI was found.
Document steps to reproduce the bug
Spherical_4PI.instr.txt
Run the attached simplistic instrument, comparing Monitor_nD and PSD_monitor_4PI output, including a 3rd. monitor that subtracts one from the other. An asymmetry is clearly seen: Too much intensity at the north pole, too little at the south pole - and bins do not end up agreeing with Monitor_nD.
The cause is the nonsensical +0.5 in the calculation of latitude
Fix
Removing the above-mentioned 0.5 lets the two monitors agree - apart from a minor discrepancy at the poles (it seems Monitor_nD looses direct up/down neutrons.)
Fixed comp - going to main shortly:
PSD_monitor_4PI.comp.txt
Describe the bug
For his project, KU BSc. student Christian Thyssen on optimising V-calibration sample geometry for CAMEA, lots of validation work was done. In the process an asymmetry in northern vs. southern hemisphere in
PSD_monitor_4PIwas found.Document steps to reproduce the bug
Spherical_4PI.instr.txt
Run the attached simplistic instrument, comparing
Monitor_nDandPSD_monitor_4PIoutput, including a 3rd. monitor that subtracts one from the other. An asymmetry is clearly seen: Too much intensity at the north pole, too little at the south pole - and bins do not end up agreeing with Monitor_nD.The cause is the nonsensical +0.5 in the calculation of latitude
Fix
Removing the above-mentioned 0.5 lets the two monitors agree - apart from a minor discrepancy at the poles (it seems
Monitor_nDlooses direct up/down neutrons.)Fixed comp - going to main shortly:
PSD_monitor_4PI.comp.txt