1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* Copyright 2019 David Grote, Luca Fedeli, Maxence Thevenet
* Weiqun Zhang
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include "PhotonParticleContainer.H"
#ifdef WARPX_QED
# include "Particles/ElementaryProcess/QEDInternals/BreitWheelerEngineWrapper.H"
#endif
#include "Particles/Gather/FieldGather.H"
#include "Particles/Gather/GetExternalFields.H"
#include "Particles/PhysicalParticleContainer.H"
#include "Particles/Pusher/CopyParticleAttribs.H"
#include "Particles/Pusher/GetAndSetPosition.H"
#include "Particles/Pusher/UpdatePositionPhoton.H"
#include "Particles/WarpXParticleContainer.H"
#include "Utils/TextMsg.H"
#include "WarpX.H"
#include <AMReX_Array.H>
#include <AMReX_Array4.H>
#include <AMReX_BLassert.H>
#include <AMReX_Box.H>
#include <AMReX_Dim3.H>
#include <AMReX_Extension.H>
#include <AMReX_FArrayBox.H>
#include <AMReX_GpuLaunch.H>
#include <AMReX_GpuQualifiers.H>
#include <AMReX_IndexType.H>
#include <AMReX_IntVect.H>
#include <AMReX_PODVector.H>
#include <AMReX_ParmParse.H>
#include <AMReX_Particles.H>
#include <AMReX_StructOfArrays.H>
#include <algorithm>
#include <array>
#include <map>
#include <memory>
using namespace amrex;
PhotonParticleContainer::PhotonParticleContainer (AmrCore* amr_core, int ispecies,
const std::string& name)
: PhysicalParticleContainer(amr_core, ispecies, name)
{
ParmParse pp_species_name(species_name);
#ifdef WARPX_QED
//Find out if Breit Wheeler process is enabled
pp_species_name.query("do_qed_breit_wheeler", m_do_qed_breit_wheeler);
//If Breit Wheeler process is enabled, look for the target electron and positron
//species
if(m_do_qed_breit_wheeler){
pp_species_name.get("qed_breit_wheeler_ele_product_species", m_qed_breit_wheeler_ele_product_name);
pp_species_name.get("qed_breit_wheeler_pos_product_species", m_qed_breit_wheeler_pos_product_name);
}
//Check for processes which do not make sense for photons
bool test_quantum_sync = false;
pp_species_name.query("do_qed_quantum_sync", test_quantum_sync);
WARPX_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,
amrex::FArrayBox const * exfab,
amrex::FArrayBox const * eyfab,
amrex::FArrayBox const * ezfab,
amrex::FArrayBox const * bxfab,
amrex::FArrayBox const * byfab,
amrex::FArrayBox const * bzfab,
const amrex::IntVect ngEB, const int /*e_is_nodal*/,
const long offset,
const long np_to_push,
int lev, int gather_lev,
amrex::Real dt, ScaleFields /*scaleFields*/, DtType a_dt_type)
{
// Get cell size on gather_lev
const std::array<Real,3>& dx = WarpX::CellSize(std::max(gather_lev,0));
// Get box from which field is gathered.
// If not gathering from the finest level, the box is coarsened.
amrex::Box box;
if (lev == gather_lev) {
box = pti.tilebox();
} else {
const IntVect& ref_ratio = WarpX::RefRatio(gather_lev);
box = amrex::coarsen(pti.tilebox(),ref_ratio);
}
// Add guard cells to the box.
box.grow(ngEB);
auto& attribs = pti.GetAttribs();
// Extract pointers to the different particle quantities
ParticleReal* const AMREX_RESTRICT ux = attribs[PIdx::ux].dataPtr() + offset;
ParticleReal* const AMREX_RESTRICT uy = attribs[PIdx::uy].dataPtr() + offset;
ParticleReal* const AMREX_RESTRICT uz = attribs[PIdx::uz].dataPtr() + offset;
#ifdef WARPX_QED
BreitWheelerEvolveOpticalDepth evolve_opt;
amrex::ParticleReal* AMREX_RESTRICT p_optical_depth_BW = nullptr;
const bool local_has_breit_wheeler = has_breit_wheeler();
if (local_has_breit_wheeler) {
evolve_opt = m_shr_p_bw_engine->build_evolve_functor();
p_optical_depth_BW = pti.GetAttribs(particle_comps["opticalDepthBW"]).dataPtr() + offset;
}
#endif
auto copyAttribs = CopyParticleAttribs(pti, tmp_particle_data, offset);
int do_copy = (m_do_back_transformed_particles && (a_dt_type!=DtType::SecondHalf) );
const auto GetPosition = GetParticlePosition(pti, offset);
auto SetPosition = SetParticlePosition(pti, offset);
const auto getExternalEB = GetExternalEBField(pti, offset);
// Lower corner of tile box physical domain (take into account Galilean shift)
const std::array<amrex::Real, 3>& xyzmin = WarpX::LowerCorner(box, gather_lev, 0._rt);
const Dim3 lo = lbound(box);
bool galerkin_interpolation = WarpX::galerkin_interpolation;
int nox = WarpX::nox;
int n_rz_azimuthal_modes = WarpX::n_rz_azimuthal_modes;
amrex::GpuArray<amrex::Real, 3> dx_arr = {dx[0], dx[1], dx[2]};
amrex::GpuArray<amrex::Real, 3> xyzmin_arr = {xyzmin[0], xyzmin[1], xyzmin[2]};
amrex::Array4<const amrex::Real> const& ex_arr = exfab->array();
amrex::Array4<const amrex::Real> const& ey_arr = eyfab->array();
amrex::Array4<const amrex::Real> const& ez_arr = ezfab->array();
amrex::Array4<const amrex::Real> const& bx_arr = bxfab->array();
amrex::Array4<const amrex::Real> const& by_arr = byfab->array();
amrex::Array4<const amrex::Real> const& bz_arr = bzfab->array();
amrex::IndexType const ex_type = exfab->box().ixType();
amrex::IndexType const ey_type = eyfab->box().ixType();
amrex::IndexType const ez_type = ezfab->box().ixType();
amrex::IndexType const bx_type = bxfab->box().ixType();
amrex::IndexType const by_type = byfab->box().ixType();
amrex::IndexType const bz_type = bzfab->box().ixType();
const auto t_do_not_gather = do_not_gather;
enum exteb_flags : int { no_exteb, has_exteb };
enum qed_flags : int { no_qed, has_qed };
int exteb_runtime_flag = getExternalEB.isNoOp() ? no_exteb : has_exteb;
#ifdef WARPX_QED
int qed_runtime_flag = (local_has_breit_wheeler) ? has_qed : no_qed;
#else
int qed_runtime_flag = no_qed;
#endif
amrex::ParallelFor(TypeList<CompileTimeOptions<no_exteb,has_exteb>,
CompileTimeOptions<no_qed ,has_qed>>{},
{exteb_runtime_flag, qed_runtime_flag},
np_to_push,
[=] AMREX_GPU_DEVICE (long i, auto exteb_control,
auto qed_control) {
if (do_copy) copyAttribs(i);
ParticleReal x, y, z;
GetPosition(i, x, y, z);
amrex::ParticleReal Exp=0, Eyp=0, Ezp=0;
amrex::ParticleReal Bxp=0, Byp=0, Bzp=0;
if(!t_do_not_gather){
// first gather E and B to the particle positions
doGatherShapeN(x, y, z, Exp, Eyp, Ezp, Bxp, Byp, Bzp,
ex_arr, ey_arr, ez_arr, bx_arr, by_arr, bz_arr,
ex_type, ey_type, ez_type, bx_type, by_type, bz_type,
dx_arr, xyzmin_arr, lo, n_rz_azimuthal_modes,
nox, galerkin_interpolation);
}
[[maybe_unused]] auto& getExternalEB_tmp = getExternalEB; // workaround for nvcc
if constexpr (exteb_control == has_exteb) {
getExternalEB(i, Exp, Eyp, Ezp, Bxp, Byp, Bzp);
}
#ifdef WARPX_QED
[[maybe_unused]] auto& evolve_opt_tmp = evolve_opt;
[[maybe_unused]] auto p_optical_depth_BW_tmp = p_optical_depth_BW;
[[maybe_unused]] auto ux_tmp = ux; // for nvhpc
[[maybe_unused]] auto uy_tmp = uy;
[[maybe_unused]] auto uz_tmp = uz;
[[maybe_unused]] auto dt_tmp = dt;
if constexpr (qed_control == has_qed) {
evolve_opt(ux[i], uy[i], uz[i], Exp, Eyp, Ezp, Bxp, Byp, Bzp,
dt, p_optical_depth_BW[i]);
}
#else
amrex::ignore_unused(qed_control);
#endif
UpdatePositionPhoton( x, y, z, ux[i], uy[i], uz[i], dt );
SetPosition(i, x, y, z);
}
);
}
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, bool skip_deposition)
{
// This does gather, push and depose.
// Push and depose have been re-written for photons
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, a_dt_type, skip_deposition);
}
|
