Constants.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#ifndef ALICEO2_FDD_CONSTANTS_H
#define ALICEO2_FDD_CONSTANTS_H
 
#include "CommonConstants/PhysicsConstants.h"
#include <cstdint>
#include <string_view>
#include <string>
#include <type_traits>
 
namespace o2
{
namespace fdd
{
constexpr short Nchannels = 16;
constexpr short Nmodules = 2;
constexpr short NChPerMod = 8;
constexpr short Ntriggers = 5;
constexpr float IntTimeRes = 0.4;
constexpr float PhotoCathodeEfficiency = 0.18;
constexpr float ChargePerADC = 0.6e-12;
constexpr float invTimePerTDC = 1. / 0.01302; // time conversion from ns to TDC channels
constexpr float timePerTDC = 0.01302;         // time conversion from TDC channels to ns
constexpr float PMTransitTime = 6.0;          // PM response time (corresponds to 1.9 ns rise time)
constexpr float PMTransparency = 0.25;        // Transparency of the first dynode of the PM
constexpr float PMNbOfSecElec = 6.0;          // Number of secondary electrons emitted from first dynode (per ph.e.)
 
constexpr int NTimeBinsPerBC = 256; // number of samples per BC
 
} // namespace fdd
} // namespace o2
 
#endif