Kaon_LT Experiment

To run the SHMS HGCER calibration script, navigate to the directory (starting in hallc_replay):

CALIBRATIONS/shms_hgcer_calib/

from here details of running the calibration code are outlined in the README. To start the calibration, use the command:

root -l run_cal.C

you will be prompted for a run number, number of events, and if the run was in COIN mode (likely, yes). Next it will ask for options for the calibration, these include:

• showall -- Show details of cuts, spectra etc. Recommended to be included in case debugging is needed.
• tracksfired -- Use an alternate calibration strategy based off trackfired branch. NOT RECOMMENDED, still needs testing.
• cut -- Apply an electron cut. Should not be necessasy.
• pions -- Select for pions. May be necessary if SPE is drowned out, but may limit available statistics.

Once the calibration is completed, a prompt will ask to update the calibration constants. If you answer "y", the new calibration will be stored in (again, starting from hallc_replay):

PARAM/SHMS/HGCER/CALIB/phgcer_calib_%d.param

where the files can be renamed to select which calibration is desired.

The identical methodology is applied for the HMS CER calibration procedure. The only differences are the location of the files,

CALIBRATION/hms_cer_calib/

and the options available. The HMS CER calibration only has "showall" implemented currently.