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/*
This file is part of LPIC++, a particle-in-cell code for
simulating the interaction of laser light with plasma.
Copyright (C) 1994-1997 Roland Lichters
LPIC++ is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <propagate.h>
void propagate::fields( domain &grid, pulse &laser_front, pulse &laser_rear )
{
static error_handler bob("propagate::fields", errname);
struct cell *cell;
double fp, fp_old, gm, gm_old;
double pidt = PI * dt;
cell=grid.left;
fp_old = cell->fp;
gm_old = cell->gm;
if (domain_number==1) {
/* cell->fp = laser_front.Qy * laser_front.field( time );
cell->gm = laser_front.Qz * laser_front.field( time + laser_front.shift ); */
cell->fp = laser_front.field( time , 0 );
cell->gm = laser_front.field( time , 1 );
}
else {
cell->fp = grid.lbuf->fp - pidt * grid.lbuf->jy;
cell->gm = grid.lbuf->gm - pidt * grid.lbuf->jz;
}
cell->fm = cell->next->fm - pidt * cell->jy;
cell->gp = cell->next->gp - pidt * cell->jz;
cell->ey = cell->fp + cell->fm; cell->ez = cell->gp + cell->gm;
cell->bz = cell->fp - cell->fm; cell->by = cell->gp - cell->gm;
cell->ex -= 2.0 * pidt * cell->jx;
for( cell=grid.left->next; cell->next!=grid.rbuf; cell=cell->next )
{
fp = cell->fp; // could be done in a more elegant
cell->fp = fp_old - pidt * cell->prev->jy; // way: i.e. do the loop twice,
fp_old = fp; // forward for fm and gp,
// backward for fp and gm
gm = cell->gm;
cell->gm = gm_old - pidt * cell->prev->jz;
gm_old = gm;
cell->fm = cell->next->fm - pidt * cell->jy;
cell->gp = cell->next->gp - pidt * cell->jz;
cell->ey = cell->fp + cell->fm; cell->bz = cell->fp - cell->fm;
cell->ez = cell->gp + cell->gm; cell->by = cell->gp - cell->gm;
cell->ex -= 2.0 * pidt * cell->jx;
}
cell->fp = fp_old - pidt * cell->prev->jy;
cell->gm = gm_old - pidt * cell->prev->jz;
if (domain_number==n_domains) {
/* cell->fm = laser_rear.Qy * laser_rear.field( time );
cell->gp = laser_rear.Qz * laser_rear.field( time + laser_rear.shift); */
cell->fm = laser_rear.field( time , 0 );
cell->gp = laser_rear.field( time , 1 );
}
else {
cell->fm = grid.rbuf->fm - pidt * cell->jy;
cell->gp = grid.rbuf->gp - pidt * cell->jz;
}
cell->ey = cell->fp + cell->fm; cell->bz = cell->fp - cell->fm;
cell->ez = cell->gp + cell->gm; cell->by = cell->gp - cell->gm;
cell->ex -= 2*pidt * cell->jx;
}
//////////////////////////////////////////////////////////////////////////////////////////
//EOF
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