algorithms/digi/LGADPulseGenerationConfig.h

0001 // SPDX-License-Identifier: LGPL-3.0-or-later
0002 // Copyright (C) 2024 Souvik Paul
0003
0004 #pragma once
0005
0006 #include <DD4hep/DD4hepUnits.h>
0007
0008 namespace eicrecon {
0009
0010 struct LGADPulseGenerationConfig {
0011   // Parameters of AC-LGAD signal generation
0012   double gain           = 113.755;
0013   double risetime       = 0.45 * dd4hep::ns;
0014   double sigma_analog   = 0.293951 * dd4hep::ns;
0015   double Vm = 1e-4 * dd4hep::GeV; // Vm = voltage maximum. When EDep = 1e-4 GeV, voltage
0016                                   // corresponds to ADC = adc_max
0017   double ignore_thres = 0.001 * Vm; // If EDep below this value, digitization for the cell will be
0018                                    // ignored. Speed up calculation
0019   int adc_bit = 8;
0020   int tdc_bit = 10;
0021
0022   // total number of TDC/ADC values
0023   // Since digitizer starts at zero, max ADC value = adc_range - 1
0024   // Similar for TDC
0025   int adc_range = std::pow(2, adc_bit);
0026   int tdc_range = std::pow(2, tdc_bit);
0027
0028   // period of the sensor clock. Time internal to sensor will all be digitized to integer multiple
0029   // of tInterval
0030   double tMax         = 25 * dd4hep::ns; // 25 ns is the period of 40MHz EIC clock
0031   double tInterval    = tMax / (tdc_range - 1);
0032
0033 };
0034
0035 } // namespace eicrecon