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/*******************************************************************************
*
* McXtrace, x-ray tracing package
* Copyright, All rights reserved
* DTU Physics, Kgs. Lyngby, Denmark
* Synchrotron SOLEIL, Saint-Aubin, France
*
* Component: Divergence_monitor
*
* %Identification
* Written by: Erik B Knudsen
* Based on neutron component by Kim Lefmann
* Date: Jun. '16
* Version: $Revision$
* Origin: DTU Physics
*
* Horizontal+vertical divergence monitor.
*
* %Description
* A 2D divergence sensitive monitor. The counts are distributed in
* (n times m) pixels.
*
* Example: Divergence_monitor(nh=20, nv=20, filename="Output.pos",
* xwidth=0.1, yheight=0.1,
* maxdiv_h=2, maxdiv_v=2)
*
* %Parameters
* INPUT PARAMETERS:
*
* xwidth: [m] Width of detector.
* yheight: [m] Height of detector.
* nv: [1] Number of pixel columns
* nh: [1] Number of pixel rows
* nx: [1] Vector definition of "forward" direction wrt. divergence, to be used e.g. when the monitor is rotated into the horizontal plane
* ny: [1] Vector definition of "forward" direction wrt. divergence, to be used e.g. when the monitor is rotated into the horizontal plane
* nz: [1] Vector definition of "forward" direction wrt. divergence, to be used e.g. when the monitor is rotated into the horizontal plane
* maxdiv_v: [degrees] Maximal vertical divergence detected
* maxdiv_h: [degrees] Maximal horizontal divergence detected
* filename: [str] Name of file in which to store the detector image text
* restore_xray: [1] If set, the monitor does not influence the photon state
* rad: [1] If set - divergence will be measured in radians.
* nowritefile: [1] If set, monitor will skip writing to disk
*
* CALCULATED PARAMETERS:
*
* Div_N: Array of photon ray counts
* Div_p: Array of photon weight counts
* Div_p2: Array of second moments
*
* %End
*******************************************************************************/
DEFINE COMPONENT Divergence_monitor
SETTING PARAMETERS (int nh=20, int nv=20, int rad=0, string filename=0,
xwidth=0.1, yheight=0.1, maxdiv_h=1, maxdiv_v=1, restore_xray=0, nx=0, ny=0, nz=1, int nowritefile=0)
/* Xray parameters: (x,y,z,kx,ky,kz,phi,t,Ex,Ey,Ez,p) */
DECLARE
%{
DArray2d Div_N;
DArray2d Div_p;
DArray2d Div_p2;
double xmin;
double xmax;
double ymin;
double ymax;
%}
INITIALIZE
%{
int i,j;
xmax = xwidth/2; xmin = -xmax;
ymax = yheight/2; ymin = -ymax;
if ((xmin >= xmax) || (ymin >= ymax)) {
printf("ERROR: (%s): Null detection area! Exiting.\n",NAME_CURRENT_COMP);
exit(-1);
}
Div_N= create_darr2d(nh,nv);
Div_p= create_darr2d(nh,nv);
Div_p2=create_darr2d(nh,nv);
NORM(nx,ny,nz);
// Use instance name for monitor output if no input was given
if (!strcmp(filename,"\0")) sprintf(filename,"%s",NAME_CURRENT_COMP);
%}
TRACE
%{
int i,j;
double h_div, v_div;
double k, kn;
PROP_Z0;
if (x>xmin && x<xmax && y>ymin && y<ymax)
{
/* Find length of projection onto the [nx ny nz] axis */
kn = scalar_prod(kx, ky, kz, nx, ny, nz);
if (rad){
h_div = atan2(kx,kn);
v_div = atan2(ky,kn);
}else{
h_div = RAD2DEG*atan2(kx,kn);
v_div = RAD2DEG*atan2(ky,kn);
}
if (h_div < maxdiv_h && h_div > -maxdiv_h &&
v_div < maxdiv_v && v_div > -maxdiv_v)
{
i = floor((h_div + maxdiv_h)*nh/(2.0*maxdiv_h));
j = floor((v_div + maxdiv_v)*nv/(2.0*maxdiv_v));
double p2=p*p;
#pragma acc atomic
Div_N[i][j] = Div_N[i][j] + 1;
#pragma acc atomic
Div_p[i][j] = Div_p[i][j] + p;
#pragma acc atomic
Div_p2[i][j] = Div_p2[i][j] + p2;
SCATTER;
}
}
if (restore_xray) {
RESTORE_XRAY(INDEX_CURRENT_COMP, x, y, z, kx, ky, kz, phi, t, Ex, Ey, Ez, p);
}
%}
SAVE
%{
if(!nowritefile){
if (rad){
DETECTOR_OUT_2D(
"Divergence monitor",
"X divergence [rad]",
"Y divergence [rad]",
-maxdiv_h, maxdiv_h, -maxdiv_v, maxdiv_v,
nh, nv,
&Div_N[0][0],&Div_p[0][0],&Div_p2[0][0],
filename);
} else {
DETECTOR_OUT_2D(
"Divergence monitor",
"X divergence [deg]",
"Y divergence [deg]",
-maxdiv_h, maxdiv_h, -maxdiv_v, maxdiv_v,
nh, nv,
&Div_N[0][0],&Div_p[0][0],&Div_p2[0][0],
filename);
}
}
%}
FINALLY
%{
destroy_darr2d(Div_N);
destroy_darr2d(Div_p);
destroy_darr2d(Div_p2);
%}
MCDISPLAY
%{
multiline(5, (double)xmin, (double)ymin, 0.0,
(double)xmax, (double)ymin, 0.0,
(double)xmax, (double)ymax, 0.0,
(double)xmin, (double)ymax, 0.0,
(double)xmin, (double)ymin, 0.0);
%}
END
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