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//Namespaces for Phase1 and Phase2
#ifndef DataFormats_EcalDigi_EcalConstants_h
#define DataFormats_EcalDigi_EcalConstants_h
#include "FWCore/Utilities/interface/HostDeviceConstant.h"
// constants used to encode difference between corrected cc time and noncorrected cc time
// into a uInt8 value to be stored in the 8 bits set aside for the jitter error ( previously unused )
namespace ecalcctiming {
inline constexpr const float clockToNS = 25.0; // Convert clock units to ns
inline constexpr const float nonCorrectedSlope = 1.2; // estimates nonCorreted time from corrected time
inline constexpr const float encodingOffest = 0.32; // offsets difference in time using clock units
inline constexpr const float encodingValue = 398.4375; // encodes time difference into 0 - 255 int range
} // namespace ecalcctiming
// The HOST_DEVICE_CONSTANTs can not reside in the classes directly, which is
// why they are defined in a namespace and constant pointers to them are used in the classes
namespace ecalph2 {
constexpr unsigned int NGAINS = 2; // Number of CATIA gains
HOST_DEVICE_CONSTANT float gains[NGAINS] = {10., 1.}; // CATIA gain values
} // namespace ecalph2
namespace ecalph1 {
constexpr unsigned int NGAINS = 4; // Number of MGPA gains including a zero gain that
// could be encoded in the gain id mask
HOST_DEVICE_CONSTANT float gains[NGAINS] = {0., 12., 6., 1.}; // MGPA gain values including a zero gain
} // namespace ecalph1
class ecalPh2 {
public:
static constexpr double Samp_Period = 6.25; // ADC sampling period in ns
static constexpr unsigned int NGAINS = ecalph2::NGAINS; // Number of CATIA gains
static constexpr const float* gains = ecalph2::gains; // CATIA gain values
static constexpr unsigned int gainId1 = 1; // Position of gain 1 in gains array
static constexpr unsigned int gainId10 = 0; // Position of gain 10 in gains array
static constexpr unsigned int sampleSize = 16; // Number of samples per event
static constexpr unsigned int NBITS = 12; // Number of available bits
static constexpr unsigned int MAXADC = (1 << NBITS) - 1; // 2^NBITS - 1, ADC max range
static constexpr unsigned int kEBChannels = 61200; // Number of channels in the barrel
static constexpr double maxEneEB = 2000.; // Max attainable energy in the barrel in GeV
// ~(MAXADC * 10(gain) * 0.05 GeV(LSB at gain 10))
static constexpr unsigned int kNOffsets = 2000; // Number of time offsets generated for APD pulse shape
// simulation and reused for every kNOffsets^th channel
static constexpr unsigned int kAdcMask = 0xFFF; // ADC sample mask for unpacking
static constexpr unsigned int kGainIdMask = 0x1; // Gain id mask for unpacking
};
class ecalPh1 {
public:
static constexpr double Samp_Period = 25.; // ADC sampling period in ns
static constexpr unsigned int NGAINS = ecalph1::NGAINS; // Number of MGPA gains including a zero gain
static constexpr const float* gains = ecalph1::gains; // MGPA gain values including a zero gain
static constexpr unsigned int sampleSize = 10; // Number of samples per event
static constexpr unsigned int NBITS = 12; // Number of available bits
static constexpr unsigned int kNOffsets = 2000; // Number of time offsets generated for APD pulse shape
// simulation and reused for every kNOffsets^th channel
static constexpr unsigned int kAdcMask = 0xFFF; // ADC sample mask for unpacking
static constexpr unsigned int kGainIdMask = 0x3; // Gain id mask for unpacking
};
#endif
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