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/* Copyright 2019 David Grote, Luca Fedeli, Maxence Thevenet
* Weiqun Zhang
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include <limits>
#include <sstream>
#include <algorithm>
#ifdef _OPENMP
#include <omp.h>
#endif
#include <PhotonParticleContainer.H>
#include <WarpX_f.H>
#include <WarpX.H>
#include <WarpXConst.H>
// Import low-level single-particle kernels
#include <UpdatePositionPhoton.H>
using namespace amrex;
PhotonParticleContainer::PhotonParticleContainer (AmrCore* amr_core, int ispecies,
const std::string& name)
: PhysicalParticleContainer(amr_core, ispecies, name)
{
ParmParse pp(species_name);
#ifdef WARPX_QED
//IF m_do_qed is enabled, find out if Breit Wheeler process is enabled
if(m_do_qed)
pp.query("do_qed_breit_wheeler", m_do_qed_breit_wheeler);
//Check for processes which do not make sense for photons
bool test_quantum_sync = false;
pp.query("do_qed_quantum_sync", test_quantum_sync);
AMREX_ALWAYS_ASSERT_WITH_MESSAGE(
test_quantum_sync == 0,
"ERROR: do_qed_quantum_sync can be 1 for species NOT listed in particles.photon_species only!");
//_________________________________________________________
#endif
}
void PhotonParticleContainer::InitData()
{
AddParticles(0); // Note - add on level 0
Redistribute(); // We then redistribute
}
void
PhotonParticleContainer::PushPX(WarpXParIter& pti,
Gpu::ManagedDeviceVector<ParticleReal>& xp,
Gpu::ManagedDeviceVector<ParticleReal>& yp,
Gpu::ManagedDeviceVector<ParticleReal>& zp,
Real dt, DtType a_dt_type)
{
// This wraps the momentum and position advance so that inheritors can modify the call.
auto& attribs = pti.GetAttribs();
// Extract pointers to the different particle quantities
ParticleReal* const AMREX_RESTRICT x = xp.dataPtr();
ParticleReal* const AMREX_RESTRICT y = yp.dataPtr();
ParticleReal* const AMREX_RESTRICT z = zp.dataPtr();
ParticleReal* const AMREX_RESTRICT ux = attribs[PIdx::ux].dataPtr();
ParticleReal* const AMREX_RESTRICT uy = attribs[PIdx::uy].dataPtr();
ParticleReal* const AMREX_RESTRICT uz = attribs[PIdx::uz].dataPtr();
const ParticleReal* const AMREX_RESTRICT Ex = attribs[PIdx::Ex].dataPtr();
const ParticleReal* const AMREX_RESTRICT Ey = attribs[PIdx::Ey].dataPtr();
const ParticleReal* const AMREX_RESTRICT Ez = attribs[PIdx::Ez].dataPtr();
const ParticleReal* const AMREX_RESTRICT Bx = attribs[PIdx::Bx].dataPtr();
const ParticleReal* const AMREX_RESTRICT By = attribs[PIdx::By].dataPtr();
const ParticleReal* const AMREX_RESTRICT Bz = attribs[PIdx::Bz].dataPtr();
if (WarpX::do_back_transformed_diagnostics && do_back_transformed_diagnostics)
{
copy_attribs(pti, x, y, z);
}
amrex::ParallelFor(
pti.numParticles(),
[=] AMREX_GPU_DEVICE (long i) {
UpdatePositionPhoton( x[i], y[i], z[i],
ux[i], uy[i], uz[i], dt );
}
);
}
void
PhotonParticleContainer::Evolve (int lev,
const MultiFab& Ex, const MultiFab& Ey, const MultiFab& Ez,
const MultiFab& Bx, const MultiFab& By, const MultiFab& Bz,
MultiFab& jx, MultiFab& jy, MultiFab& jz,
MultiFab* cjx, MultiFab* cjy, MultiFab* cjz,
MultiFab* rho, MultiFab* crho,
const MultiFab* cEx, const MultiFab* cEy, const MultiFab* cEz,
const MultiFab* cBx, const MultiFab* cBy, const MultiFab* cBz,
Real t, Real dt, DtType a_dt_type)
{
// This does gather, push and depose.
// Push and depose have been re-written for photon,
// so they do not do anything.
PhysicalParticleContainer::Evolve (lev,
Ex, Ey, Ez,
Bx, By, Bz,
jx, jy, jz,
cjx, cjy, cjz,
rho, crho,
cEx, cEy, cEz,
cBx, cBy, cBz,
t, dt);
}
#ifdef WARPX_QED
void
PhotonParticleContainer::EvolveOpticalDepth(
WarpXParIter& pti,amrex::Real dt)
{
if(!has_breit_wheeler())
return;
auto& attribs = pti.GetAttribs();
ParticleReal* const AMREX_RESTRICT ux = attribs[PIdx::ux].dataPtr();
ParticleReal* const AMREX_RESTRICT uy = attribs[PIdx::uy].dataPtr();
ParticleReal* const AMREX_RESTRICT uz = attribs[PIdx::uz].dataPtr();
const ParticleReal* const AMREX_RESTRICT Ex = attribs[PIdx::Ex].dataPtr();
const ParticleReal* const AMREX_RESTRICT Ey = attribs[PIdx::Ey].dataPtr();
const ParticleReal* const AMREX_RESTRICT Ez = attribs[PIdx::Ez].dataPtr();
const ParticleReal* const AMREX_RESTRICT Bx = attribs[PIdx::Bx].dataPtr();
const ParticleReal* const AMREX_RESTRICT By = attribs[PIdx::By].dataPtr();
const ParticleReal* const AMREX_RESTRICT Bz = attribs[PIdx::Bz].dataPtr();
BreitWheelerEvolveOpticalDepth evolve_opt =
m_shr_p_bw_engine->build_evolve_functor();
amrex::Real* AMREX_RESTRICT p_tau =
pti.GetAttribs(particle_comps["tau"]).dataPtr();
const auto me = PhysConst::m_e;
amrex::ParallelFor(
pti.numParticles(),
[=] AMREX_GPU_DEVICE (long i) {
const ParticleReal px = me * ux[i];
const ParticleReal py = me * uy[i];
const ParticleReal pz = me * uz[i];
bool has_event_happened = evolve_opt(
px, py, pz,
Ex[i], Ey[i], Ez[i],
Bx[i], By[i], Bz[i],
dt, p_tau[i]);
}
);
}
#endif
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