# # BCAL data base of constants used in MC # # Silicon PMT dark rate BCAL_DARKRATE_GHZ 0.041 # Cross talk between readout cells BCAL_XTALK_FRACT 0.03 # integration widnows in [ns] BCAL_INTWINDOW_NS 100. # Photon dedection efficiency BCAL_DEVICEPDE 0.12 # sampling fraction BCAL_SAMPLING_FRACT 0.15 # maximum hit occupancy BCAL_MAXOCCUPANCY_FRACT 0.05 #GX-doc 1069, Table 1 -- try to extract back to #photons per side per MeV in fiber #4.6 / PDE / attentuation (meaurements performed in center) #75 = 4.6 / 0.12 / exp( -200 / 300 ) BCAL_PHOTONSPERSIDEPERMEV_INFIBER 75 #set the sampling smearing coefficients: #(from GlueX-doc 827 v3 Figure 13 ) BCAL_SAMPLINGCOEFA 0.042 BCAL_SAMPLINGCOEFB 0.013 #time smearing comes from beam test time difference resolution with #beam incident on the center of the module BCAL_TIMEDIFFCOEFA 0.098994949 #no floor term, but leave the option here: BCAL_TIMEDIFFCOEFB 0 #set this low for now -- needs more thought later BCAL_CELLOUTERTHRESHOLD 0.001 #calculated later in based on number of photons and ph threshold Bcal_CellInnerThreshold 0. # Threshold applied to energy deposition in MeV BCAL_THRESH_MEV 1. # time window for two hit resolution in ns BCAL_TWO_HIT_RESOL 50. # maximum number of hits per readout channels BCAL_MAX_HITS 100