PulsedDecay.H

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/* Copyright 2026
 *
 * This file is part of WarpX.
 *
 * License: BSD-3-Clause-LBNL
 */
#ifndef WARPX_PULSED_DECAY_H
#define WARPX_PULSED_DECAY_H
 
#include "Particles/MultiParticleContainer.H"
#include "Particles/Collision/CollisionBase.H"
 
#include <AMReX_Parser.H>
#include <AMReX_REAL.H>
#include <AMReX_Vector.H>
#include <AMReX_GpuContainers.H>
 
#include <memory>
#include <string>

 
class PulsedDecay final
    : public CollisionBase
{
public:
    PulsedDecay (std::string const& collision_name, MultiParticleContainer const * mypc);
 
    ~PulsedDecay () override = default;
 
    PulsedDecay ( PulsedDecay const &)             = delete;
    PulsedDecay& operator= ( PulsedDecay const & ) = delete;
    PulsedDecay ( PulsedDecay&& )                  = delete;
    PulsedDecay& operator= ( PulsedDecay&& )       = delete;

    void doCollisions (amrex::Real cur_time, amrex::Real dt, MultiParticleContainer* mypc) override;
 
private:
 
    amrex::Vector<std::string> m_product_species;
 
    amrex::ParticleReal m_fixed_product_weight;
    amrex::GpuArray<amrex::ParticleReal,3> m_productA_thermal_speed;
    amrex::GpuArray<amrex::ParticleReal,3> m_productB_thermal_speed;
 
    amrex::Parser m_decay_rate_parser;
    amrex::ParserExecutor<4> m_decay_rate_func;
};
 
#endif // WARPX_PULSED_DECAY_H