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/* Copyright 2019-2020 Yinjian Zhao
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include "BeamRelevant.H"
#include "Diagnostics/ReducedDiags/ReducedDiags.H"
#include "Particles/MultiParticleContainer.H"
#include "Particles/WarpXParticleContainer.H"
#include "Utils/WarpXConst.H"
#include "WarpX.H"
#include <AMReX_GpuQualifiers.H>
#include <AMReX_PODVector.H>
#include <AMReX_ParallelDescriptor.H>
#include <AMReX_ParmParse.H>
#include <AMReX_ParticleReduce.H>
#include <AMReX_Particles.H>
#include <AMReX_REAL.H>
#include <AMReX_Tuple.H>
#include <algorithm>
#include <cmath>
#include <fstream>
#include <limits>
#include <map>
#include <vector>
using namespace amrex;
// constructor
BeamRelevant::BeamRelevant (std::string rd_name)
: ReducedDiags{rd_name}
{
// read beam name
const ParmParse pp_rd_name(rd_name);
pp_rd_name.get("species",m_beam_name);
// resize data array
#if (defined WARPX_DIM_3D || defined WARPX_DIM_RZ)
// 0, 1, 2: mean x,y,z
// 3, 4, 5: mean px,py,pz
// 6: gamma
// 7, 8, 9: rms x,y,z
// 10,11,12: rms px,py,pz
// 13: rms gamma
// 14,15,16: emittance x,y,z
// 17,18: Twiss-alpha x,y
// 19,20: beta-function x,y
// 21: charge
m_data.resize(22, 0.0_rt);
#elif (defined WARPX_DIM_XZ)
// 0, 1: mean x,z
// 2, 3, 4: mean px,py,pz
// 5: gamma
// 6, 7: rms x,z
// 8, 9,10: rms px,py,pz
// 11: rms gamma
// 12,13: emittance x,z
// 14: Twiss-alpha x
// 15: beta-function x
// 16: charge
m_data.resize(17, 0.0_rt);
#elif (defined WARPX_DIM_1D_Z)
// 0 : mean z
// 1,2,3 : mean px,py,pz
// 4 : gamma
// 5 : rms z
// 6,7,8 : rms px,py,pz
// 9 : rms gamma
// 10 : emittance z
// 11 : charge
m_data.resize(12, 0.0_rt);
#endif
if (ParallelDescriptor::IOProcessor())
{
if ( m_IsNotRestart )
{
// open file
std::ofstream ofs{m_path + m_rd_name + "." + m_extension, std::ofstream::out};
// write header row
#if (defined WARPX_DIM_3D || defined WARPX_DIM_RZ)
int c = 0;
ofs << "#";
ofs << "[" << c++ << "]step()"; ofs << m_sep;
ofs << "[" << c++ << "]time(s)"; ofs << m_sep;
ofs << "[" << c++ << "]x_mean(m)"; ofs << m_sep;
ofs << "[" << c++ << "]y_mean(m)"; ofs << m_sep;
ofs << "[" << c++ << "]z_mean(m)"; ofs << m_sep;
ofs << "[" << c++ << "]px_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]py_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]pz_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]gamma_mean()"; ofs << m_sep;
ofs << "[" << c++ << "]x_rms(m)"; ofs << m_sep;
ofs << "[" << c++ << "]y_rms(m)"; ofs << m_sep;
ofs << "[" << c++ << "]z_rms(m)"; ofs << m_sep;
ofs << "[" << c++ << "]px_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]py_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]pz_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]gamma_rms()"; ofs << m_sep;
ofs << "[" << c++ << "]emittance_x(m)"; ofs << m_sep;
ofs << "[" << c++ << "]emittance_y(m)"; ofs << m_sep;
ofs << "[" << c++ << "]emittance_z(m)"; ofs << m_sep;
ofs << "[" << c++ << "]alpha_x()"; ofs << m_sep;
ofs << "[" << c++ << "]alpha_y()"; ofs << m_sep;
ofs << "[" << c++ << "]beta_x(m)"; ofs << m_sep;
ofs << "[" << c++ << "]beta_y(m)"; ofs << m_sep;
ofs << "[" << c++ << "]charge(C)"; ofs << std::endl;
#elif (defined WARPX_DIM_XZ)
int c = 0;
ofs << "#";
ofs << "[" << c++ << "]step()"; ofs << m_sep;
ofs << "[" << c++ << "]time(s)"; ofs << m_sep;
ofs << "[" << c++ << "]x_mean(m)"; ofs << m_sep;
ofs << "[" << c++ << "]z_mean(m)"; ofs << m_sep;
ofs << "[" << c++ << "]px_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]py_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]pz_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]gamma_mean()"; ofs << m_sep;
ofs << "[" << c++ << "]x_rms(m)"; ofs << m_sep;
ofs << "[" << c++ << "]z_rms(m)"; ofs << m_sep;
ofs << "[" << c++ << "]px_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]py_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]pz_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]gamma_rms()"; ofs << m_sep;
ofs << "[" << c++ << "]emittance_x(m)"; ofs << m_sep;
ofs << "[" << c++ << "]emittance_z(m)"; ofs << m_sep;
ofs << "[" << c++ << "]alpha_x()"; ofs << m_sep;
ofs << "[" << c++ << "]beta_x(m)"; ofs << m_sep;
ofs << "[" << c++ << "]charge(C)"; ofs << std::endl;
#elif (defined WARPX_DIM_1D_Z)
int c = 0;
ofs << "#";
ofs << "[" << c++ << "]step()"; ofs << m_sep;
ofs << "[" << c++ << "]time(s)"; ofs << m_sep;
ofs << "[" << c++ << "]z_mean(m)"; ofs << m_sep;
ofs << "[" << c++ << "]px_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]py_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]pz_mean(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]gamma_mean()"; ofs << m_sep;
ofs << "[" << c++ << "]z_rms(m)"; ofs << m_sep;
ofs << "[" << c++ << "]px_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]py_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]pz_rms(kg*m/s)"; ofs << m_sep;
ofs << "[" << c++ << "]gamma_rms()"; ofs << m_sep;
ofs << "[" << c++ << "]emittance_z(m)"; ofs << m_sep;
ofs << "[" << c++ << "]charge(C)"; ofs << std::endl;
#endif
// close file
ofs.close();
}
}
}
// end constructor
// function that compute beam relevant quantities
void BeamRelevant::ComputeDiags (int step)
{
// Judge if the diags should be done
if (!m_intervals.contains(step+1)) { return; }
// get MultiParticleContainer class object
const auto & mypc = WarpX::GetInstance().GetPartContainer();
// get number of species
int const nSpecies = mypc.nSpecies();
// get species names (std::vector<std::string>)
auto const species_names = mypc.GetSpeciesNames();
// inverse of speed of light squared
Real constexpr inv_c2 = 1.0_rt / (PhysConst::c * PhysConst::c);
// If 2D-XZ, p.pos(1) is z, rather than p.pos(2).
#if (defined WARPX_DIM_3D)
int const index_z = 2;
#elif (defined WARPX_DIM_XZ || defined WARPX_DIM_RZ)
int const index_z = 1;
#elif (defined WARPX_DIM_1D_Z)
int const index_z = 0;
#endif
// loop over species
for (int i_s = 0; i_s < nSpecies; ++i_s)
{
// only beam species does
if (species_names[i_s] != m_beam_name) { continue; }
// get WarpXParticleContainer class object
auto const & myspc = mypc.GetParticleContainer(i_s);
// get mass and charge
ParticleReal const m = myspc.getMass();
ParticleReal const q = myspc.getCharge();
using PType = typename WarpXParticleContainer::SuperParticleType;
amrex::ReduceOps<ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum,
ReduceOpSum,ReduceOpSum,ReduceOpSum> reduce_ops;
auto r = amrex::ParticleReduce<amrex::ReduceData<ParticleReal,ParticleReal,
ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal>>(
myspc,
[=] AMREX_GPU_DEVICE(const PType& p) noexcept -> amrex::GpuTuple
<ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal,
ParticleReal,ParticleReal,ParticleReal>
{
const ParticleReal p_ux = p.rdata(PIdx::ux);
const ParticleReal p_uy = p.rdata(PIdx::uy);
const ParticleReal p_uz = p.rdata(PIdx::uz);
const ParticleReal p_us = p_ux*p_ux + p_uy*p_uy + p_uz*p_uz;
const ParticleReal p_pos0 = p.pos(0);
const ParticleReal p_w = p.rdata(PIdx::w);
#if (defined WARPX_DIM_RZ)
const ParticleReal p_theta = p.rdata(PIdx::theta);
const ParticleReal p_x_mean = p_pos0*std::cos(p_theta)*p_w;
const ParticleReal p_y_mean = p_pos0*std::sin(p_theta)*p_w;
#else
const ParticleReal p_pos1 = p.pos(1);
const ParticleReal p_x_mean = p_pos0*p_w;
const ParticleReal p_y_mean = p_pos1*p_w;
#endif
const ParticleReal p_z_mean = p.pos(index_z)*p_w;
const ParticleReal p_ux_mean = p_ux*p_w;
const ParticleReal p_uy_mean = p_uy*p_w;
const ParticleReal p_uz_mean = p_uz*p_w;
const ParticleReal p_gm_mean = std::sqrt(1.0_rt+p_us*inv_c2)*p_w;
return {p_w,
p_x_mean, p_y_mean, p_z_mean,
p_ux_mean, p_uy_mean, p_uz_mean,
p_gm_mean};
},
reduce_ops);
std::vector<ParticleReal> values_per_rank_1st = {
amrex::get<0>(r), // w
amrex::get<1>(r), // x_mean
amrex::get<2>(r), // y_mean
amrex::get<3>(r), // z_mean
amrex::get<4>(r), // ux_mean
amrex::get<5>(r), // uy_mean
amrex::get<6>(r), // uz_mean
amrex::get<7>(r), // gm_mean
};
// reduced sum over mpi ranks (allreduce)
amrex::ParallelAllReduce::Sum
( values_per_rank_1st.data(), values_per_rank_1st.size(), ParallelDescriptor::Communicator());
const ParticleReal w_sum = values_per_rank_1st.at(0);
const ParticleReal x_mean = values_per_rank_1st.at(1) /= w_sum;
const ParticleReal y_mean = values_per_rank_1st.at(2) /= w_sum;
const ParticleReal z_mean = values_per_rank_1st.at(3) /= w_sum;
const ParticleReal ux_mean = values_per_rank_1st.at(4) /= w_sum;
const ParticleReal uy_mean = values_per_rank_1st.at(5) /= w_sum;
const ParticleReal uz_mean = values_per_rank_1st.at(6) /= w_sum;
const ParticleReal gm_mean = values_per_rank_1st.at(7) /= w_sum;
if (w_sum < std::numeric_limits<Real>::min() )
{
for (auto& item: m_data) item = 0.0_rt;
return;
}
amrex::ReduceOps<ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum,
ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum,ReduceOpSum> reduce_ops2;
auto r2 = amrex::ParticleReduce<amrex::ReduceData<ParticleReal,ParticleReal,
ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal,
ParticleReal,ParticleReal,ParticleReal>>(
myspc,
[=] AMREX_GPU_DEVICE(const PType& p) noexcept -> amrex::GpuTuple
<ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal,
ParticleReal,ParticleReal,ParticleReal,ParticleReal,ParticleReal>
{
const ParticleReal p_ux = p.rdata(PIdx::ux);
const ParticleReal p_uy = p.rdata(PIdx::uy);
const ParticleReal p_uz = p.rdata(PIdx::uz);
const ParticleReal p_us = p_ux*p_ux + p_uy*p_uy + p_uz*p_uz;
const ParticleReal p_gm = std::sqrt(1.0_rt+p_us*inv_c2);
const ParticleReal p_w = p.rdata(PIdx::w);
#if (defined WARPX_DIM_1D_Z)
const ParticleReal p_x = 0.0;
const ParticleReal p_y = 0.0;
#elif (defined WARPX_DIM_RZ)
const ParticleReal p_pos0 = p.pos(0);
const ParticleReal p_theta = p.rdata(PIdx::theta);
const ParticleReal p_x = p_pos0*std::cos(p_theta);
const ParticleReal p_y = p_pos0*std::sin(p_theta);
#elif (defined WARPX_DIM_XZ)
const ParticleReal p_pos0 = p.pos(0);
const ParticleReal p_x = p_pos0;
const ParticleReal p_y = 0.0;
#else
const ParticleReal p_pos0 = p.pos(0);
const ParticleReal p_pos1 = p.pos(1);
const ParticleReal p_x = p_pos0;
const ParticleReal p_y = p_pos1;
#endif
const ParticleReal p_z = p.pos(index_z);
const ParticleReal p_x_ms = (p_x-x_mean)*(p_x-x_mean)*p_w;
const ParticleReal p_y_ms = (p_y-y_mean)*(p_y-y_mean)*p_w;
const ParticleReal p_z_ms = (p_z-z_mean)*(p_z-z_mean)*p_w;
const ParticleReal p_ux_ms = (p_ux-ux_mean)*(p_ux-ux_mean)*p_w;
const ParticleReal p_uy_ms = (p_uy-uy_mean)*(p_uy-uy_mean)*p_w;
const ParticleReal p_uz_ms = (p_uz-uz_mean)*(p_uz-uz_mean)*p_w;
const ParticleReal p_gm_ms = (p_gm-gm_mean)*(p_gm-gm_mean)*p_w;
const ParticleReal p_xux = (p_x-x_mean)*(p_ux-ux_mean)*p_w;
const ParticleReal p_yuy = (p_y-y_mean)*(p_uy-uy_mean)*p_w;
const ParticleReal p_zuz = (p_z-z_mean)*(p_uz-uz_mean)*p_w;
const ParticleReal p_charge = q*p_w;
return {p_x_ms, p_y_ms, p_z_ms,
p_ux_ms, p_uy_ms, p_uz_ms,
p_gm_ms,
p_xux, p_yuy, p_zuz,
p_charge};
},
reduce_ops2);
std::vector<ParticleReal> values_per_rank_2nd = {
amrex::get<0>(r2), // x_ms
amrex::get<1>(r2), // y_ms
amrex::get<2>(r2), // z_ms
amrex::get<3>(r2), // ux_ms
amrex::get<4>(r2), // uy_ms
amrex::get<5>(r2), // uz_ms
amrex::get<6>(r2), // gm_ms
amrex::get<7>(r2), // xux
amrex::get<8>(r2), // yuy
amrex::get<9>(r2), // zuz
amrex::get<10>(r2) // charge
};
// reduced sum over mpi ranks (reduce to IO rank)
ParallelDescriptor::ReduceRealSum
( values_per_rank_2nd.data(), values_per_rank_2nd.size(), ParallelDescriptor::IOProcessorNumber());
const ParticleReal x_ms = values_per_rank_2nd.at(0) /= w_sum;
const ParticleReal y_ms = values_per_rank_2nd.at(1) /= w_sum;
const ParticleReal z_ms = values_per_rank_2nd.at(2) /= w_sum;
const ParticleReal ux_ms = values_per_rank_2nd.at(3) /= w_sum;
const ParticleReal uy_ms = values_per_rank_2nd.at(4) /= w_sum;
const ParticleReal uz_ms = values_per_rank_2nd.at(5) /= w_sum;
const ParticleReal gm_ms = values_per_rank_2nd.at(6) /= w_sum;
const ParticleReal xux = values_per_rank_2nd.at(7) /= w_sum;
const ParticleReal yuy = values_per_rank_2nd.at(8) /= w_sum;
const ParticleReal zuz = values_per_rank_2nd.at(9) /= w_sum;
const ParticleReal charge = values_per_rank_2nd.at(10);
// save data
#if (defined WARPX_DIM_3D || defined WARPX_DIM_RZ)
m_data[0] = x_mean;
m_data[1] = y_mean;
m_data[2] = z_mean;
m_data[3] = ux_mean * m;
m_data[4] = uy_mean * m;
m_data[5] = uz_mean * m;
m_data[6] = gm_mean;
m_data[7] = std::sqrt(x_ms);
m_data[8] = std::sqrt(y_ms);
m_data[9] = std::sqrt(z_ms);
m_data[10] = std::sqrt(ux_ms) * m;
m_data[11] = std::sqrt(uy_ms) * m;
m_data[12] = std::sqrt(uz_ms) * m;
m_data[13] = std::sqrt(gm_ms);
m_data[14] = std::sqrt(x_ms*ux_ms-xux*xux) / PhysConst::c;
m_data[15] = std::sqrt(y_ms*uy_ms-yuy*yuy) / PhysConst::c;
m_data[16] = std::sqrt(z_ms*uz_ms-zuz*zuz) / PhysConst::c;
m_data[17] = - (PhysConst::c * xux) / std::sqrt(x_ms*ux_ms-xux*xux);
m_data[18] = - (PhysConst::c * yuy) / std::sqrt(y_ms*uy_ms-yuy*yuy);
m_data[19] = (PhysConst::c * x_ms) / std::sqrt(x_ms*ux_ms-xux*xux);
m_data[20] = (PhysConst::c * y_ms) / std::sqrt(y_ms*uy_ms-yuy*yuy);
m_data[21] = charge;
#elif (defined WARPX_DIM_XZ)
m_data[0] = x_mean;
m_data[1] = z_mean;
m_data[2] = ux_mean * m;
m_data[3] = uy_mean * m;
m_data[4] = uz_mean * m;
m_data[5] = gm_mean;
m_data[6] = std::sqrt(x_ms);
m_data[7] = std::sqrt(z_ms);
m_data[8] = std::sqrt(ux_ms) * m;
m_data[9] = std::sqrt(uy_ms) * m;
m_data[10] = std::sqrt(uz_ms) * m;
m_data[11] = std::sqrt(gm_ms);
m_data[12] = std::sqrt(x_ms*ux_ms-xux*xux) / PhysConst::c;
m_data[13] = std::sqrt(z_ms*uz_ms-zuz*zuz) / PhysConst::c;
m_data[14] = - (PhysConst::c * xux) / std::sqrt(x_ms*ux_ms-xux*xux);
m_data[15] = (PhysConst::c * x_ms) / std::sqrt(x_ms*ux_ms-xux*xux);
m_data[16] = charge;
amrex::ignore_unused(y_mean, y_ms, yuy);
#elif (defined WARPX_DIM_1D_Z)
m_data[0] = z_mean;
m_data[1] = ux_mean * m;
m_data[2] = uy_mean * m;
m_data[3] = uz_mean * m;
m_data[4] = gm_mean;
m_data[5] = std::sqrt(z_ms);
m_data[6] = std::sqrt(ux_ms) * m;
m_data[7] = std::sqrt(uy_ms) * m;
m_data[8] = std::sqrt(uz_ms) * m;
m_data[9] = std::sqrt(gm_ms);
m_data[10] = std::sqrt(z_ms*uz_ms-zuz*zuz) / PhysConst::c;
m_data[11] = charge;
amrex::ignore_unused(x_mean, x_ms, xux, y_mean, y_ms, yuy);
#endif
}
// end loop over species
}
// end void BeamRelevant::ComputeDiags
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