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/* Copyright 2019
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#ifndef WARPX_PSATD_ALGORITHM_FIRST_ORDER_H_
#define WARPX_PSATD_ALGORITHM_FIRST_ORDER_H_
#include "FieldSolver/SpectralSolver/SpectralFieldData.H"
#include "FieldSolver/SpectralSolver/SpectralKSpace.H"
#include "SpectralBaseAlgorithm.H"
#include <AMReX_Array.H>
#include <AMReX_Config.H>
#include <AMReX_REAL.H>
#include <AMReX_BaseFwd.H>
#include <array>
#include <memory>
#if WARPX_USE_PSATD
/*
* \brief Class that updates the fields in spectral space according to the first-order PSATD equations.
*/
class PsatdAlgorithmFirstOrder : public SpectralBaseAlgorithm
{
public:
/**
* \brief Constructor of the class PsatdAlgorithmFirstOrder
*
* \param[in] spectral_kspace spectral space
* \param[in] dm distribution mapping
* \param[in] spectral_index object containing indices to access data in spectral space
* \param[in] norder_x order of the spectral solver along x
* \param[in] norder_y order of the spectral solver along y
* \param[in] norder_z order of the spectral solver along z
* \param[in] grid_type type of grid (collocated or not)
* \param[in] dt time step of the simulation
* \param[in] div_cleaning whether to use divergence correction for both E and B (thus, F and G)
* \param[in] J_in_time time dependency of J (currently supported: constant, linear)
* \param[in] rho_in_time time dependency of rho (currently supported: constant, linear)
*/
PsatdAlgorithmFirstOrder (
const SpectralKSpace& spectral_kspace,
const amrex::DistributionMapping& dm,
const SpectralFieldIndex& spectral_index,
const int norder_x,
const int norder_y,
const int norder_z,
const short grid_type,
const amrex::Real dt,
const bool div_cleaning,
const int J_in_time,
const int rho_in_time);
/**
* \brief Updates E, B, F, and G fields in spectral space,
* according to the first-order PSATD equations
*
* \param[in,out] f all the fields in spectral space
*/
virtual void pushSpectralFields (SpectralFieldData& f) const override final;
/**
* \brief Virtual function for current correction in Fourier space
* (<a href="https://doi.org/10.1016/j.jcp.2013.03.010"> Vay et al, 2013</a>).
* This function overrides the virtual function \c CurrentCorrection in the
* base class \c SpectralBaseAlgorithm and cannot be overridden by further
* derived classes.
*
* \param[in,out] field_data All fields in Fourier space
*/
virtual void CurrentCorrection (SpectralFieldData& field_data) override final;
/**
* \brief Virtual function for Vay current deposition in Fourier space
* (<a href="https://doi.org/10.1016/j.jcp.2013.03.010"> Vay et al, 2013</a>).
* This function overrides the virtual function \c VayDeposition in the
* base class \c SpectralBaseAlgorithm and cannot be overridden by further
* derived classes.
*
* \param[in,out] field_data All fields in Fourier space
*/
virtual void VayDeposition (SpectralFieldData& field_data) override final;
private:
// Other member variables
amrex::Real m_dt;
bool m_div_cleaning;
int m_J_in_time;
int m_rho_in_time;
};
#endif // WARPX_USE_PSATD
#endif // WARPX_PSATD_ALGORITHM_FIRST_ORDER_H_
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