CCDB Tables BCAL
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Contents
Variations
No interesting variations at the moment.
Tables
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
ATTEN_LENGTH | 300. | |
C_EFFECTIVE | 16.75 | |
SiPM_tbin_width | 0.100 |
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