Calibration Files for GEM data

The following calibration files are available for use when running NORM on GEM data.

These files are spectrum calibration files and are NOT suitable for use with the current version of gudrun which requires detector calibration files - see here.

File	Suitable for these run numbers	Number of spectra
norm_par:detector_993.calib	74-662	2854
norm_par:detector_994.calib	663-1163	2790
norm_par:detector_995.calib	1164-1463	2910
norm_par:detector_001.calib	3366-3508	3190
norm_par:detector_001m.calib	3509-5485	3194
norm_par:gem_det_3194_003c1.calib	5486-8504	3194
norm_par:gem_det_3524_014.calib	8509-8753	3524
norm_par:gem_det_3530_014.calib	8754-10262	3530
norm_par:gem_det_5774_021.calib	10263-10569	5774
norm_par:gem_det_6496_024.calib	10586-12302	6496
norm_par:gem_det_6496_025c1.calib	12303-15584	6496
norm_par:gem_det_7296_033_bank0c1.calib	15585-16504	7296
norm_par:gem_det_7290_034c1.calib	16505 onwards	7290

(In order to use one of these calibration files in NORM, you must copy it into your directory, giving it the name DETECTOR.CALIB)

The last 3 digits of a filename refer roughly to the ISIS cycle when the file first became relevant.

These files are appropriate for GEM with its standard setup. Sometimes GEM operates with a non-standard setup with a smaller number of spectra so that runs can BEGIN and END more quickly. The first 4 digits in the above filenames refer to the number of spectra in the .RAW file. If you think that your data may have been taken with a non-standard setup of GEM then please compare the number of spectra in your .RAW files with the number of spectra indicated in the above filenames. If they are different then it will be necessary to generate a new calibration file using the GEMDET programme - please contact Alex Hannon for help with this.