CCDB Tables BCAL

Variations

No interesting variations at the moment.

BCAL/bcal_parms

BCAL_DARKRATE_GHZ	0.0176	Silicon PMT dark rate (from GlueX-doc-1754-v3)
BCAL_SIGMA_SIG_RELATIVE	0.105	Single PE width to amplitude ratio 6.489/61.67 = 0.105 (from GlueX-doc-1754-v3)
BCAL_SIGMA_PED_RELATIVE	0.139	Pedestal width to single PE amplitude ratio 8.585/61.67 = 0.139 (from GlueX-doc-1754-v3)
BCAL_SIPM_GAIN_VARIATION	0.04	Variation of gains between individual SiPM tiles. Yi measured a value of ~4% and indicated this in private communication.
BCAL_XTALK_FRACT	0.10	This factor includes both the cross-talk and after-pulse probability for a 100ns window.
BCAL_INTWINDOW_NS	100.	integration widnows in [ns]
BCAL_DEVICEPDE	0.21	Photon detection efficiency (from GlueX-doc-1754-v3)
BCAL_SAMPLING_FRACT	0.095	Sampling Fraction
BCAL_AVG_DARK_DIGI_VALS_PER_EVENT	240	Digitized values due to dark pulses only: Inner region has 3 digitized values/event, Outer region has 2 digitized values/event
BCAL_PHOTONSPERSIDEPERMEV_INFIBER	75	try to extract from GlueX-doc-1069 back to photons per side per MeV in fiber
BCAL_SAMPLINGCOEFA	0.042	Set the sampling smearing coefficients ( from GlueX-doc 827 v3 Figure 13 )
BCAL_SAMPLINGCOEFB	0.013
BCAL_TIMEDIFFCOEFA	0.098994949	time smearing comes from beam test time difference resolution with beam incident on the center of the module
BCAL_TIMEDIFFCOEFB	0	no floor term, but leave the option here
BCAL_THRESH_MEV	1.	Threshold applied to energy deposition in MeV (HDGeant)
BCAL_TWO_HIT_RESOL	50.	time window for two hit resolution in ns
BCAL_MAX_HITS	100	maximum number of hits per readout channels

BCAL/mc_parms

BCAL/cluster_merging

MIN_CLUSTER_SEPARATION_XY	15.0	Minimum separation between 2 clusters for them NOT to be merged (cm)
MIN_CLUSTER_SEPARATION_Z	30.0

Parameters used for deciding whether 2 BCAL clusters should be merged or not when creating DBCALPhoton objects out of DBCALShower objects