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/*******************************************************************************
*
* McStas, neutron ray-tracing package
* Copyright 1997-2002, All rights reserved
* Risoe National Laboratory, Roskilde, Denmark
* Institut Laue Langevin, Grenoble, France
*
* Component: Hdiv_monitor
*
*%I
* Written by: KL,
* Date: Nov. 11, 1998
* Origin: Risoe
* Modified by: Thomas Hansen, December, 1999
* Modified by: Erik B Knudsen, Sep, 2020
*
* A 1D divergence sensitive monitor.
*
* %D
* A divergence sensitive monitor. The counts are distributed in
* ndiv pixels along either the horizontal axis x (default) or the vertical y.
*
* Example: Div1D_monitor(xmin=-0.1, xmax=0.1, ymin=-0.1, ymax=0.1, ndiv=20, filename="Output.hd", maxdiv=2)
*
* %P
* INPUT PARAMETERS:
*
* xmin: [m] Lower x bound of detector opening
* xmax: [m] Upper x bound of detector opening
* ymin: [m] Lower y bound of detector opening
* ymax: [m] Upper y bound of detector opening
* xwidth: [m] Width of detector. Overrides xmin,xmax.
* yheight: [m] Height of detector. Overrides ymin,ymax.
* ndiv: [1] Number of pixel rows
* maxdiv: [deg] Maximal divergence detected
* filename: [str] Name of file in which to store the detector image
* restore_neutron: [1] If set, the monitor does not influence the neutron state
* nowritefile: [1] If set, monitor will skip writing to disk
* vertical: [1] If set, measure vertical divergence instead of horizontal.
*
* CALCULATED PARAMETERS:
*
* Div_N: [] Array of neutron counts
* Div_p: [] Array of neutron weight counts
* Div_p2: [] Array of second moments
*
*%E
*******************************************************************************/
DEFINE COMPONENT Div1D_monitor
SETTING PARAMETERS (int ndiv=20, string filename=0,
xmin=-0.05, xmax=0.05, ymin=-0.05, ymax=0.05, xwidth=0, yheight=0,
maxdiv=2, int restore_neutron=0, int nowritefile=0, int vertical=0)
/* Neutron parameters: (x,y,z,vx,vy,vz,t,sx,sy,sz,p) */
DECLARE
%{
DArray1d Div_N;
DArray1d Div_p;
DArray1d Div_p2;
%}
INITIALIZE
%{
int i;
if (xwidth > 0) { xmax = xwidth/2; xmin = -xmax; }
if (yheight > 0) { ymax = yheight/2; ymin = -ymax; }
if ((xmin >= xmax) || (ymin >= ymax)) {
printf("Error(%s): Div1D_monitor: Null detection area !\n"
"(xwidth,yheight,xmin,xmax,ymin,ymax). Exiting",
NAME_CURRENT_COMP);
exit(-1);
}
Div_N = create_darr1d(ndiv);
Div_p = create_darr1d(ndiv);
Div_p2 = create_darr1d(ndiv);
for (i=0; i<ndiv; i++){
Div_N[i] = 0;
Div_p[i] = 0;
Div_p2[i] = 0;
}
// Use instance name for monitor output if no input was given
if (!strcmp(filename,"\0")) sprintf(filename,"%s",NAME_CURRENT_COMP);
%}
TRACE
%{
int i;
double div;
PROP_Z0;
if (x>xmin && x<xmax && y>ymin && y<ymax)
{
if (!vertical){
div = RAD2DEG*atan2(vx,vz);
}else{
div = RAD2DEG*atan2(vy,vz);
}
if (div < (double)maxdiv && div > -(double)maxdiv){
i = floor((div + (double)maxdiv)*ndiv/(2.0*(double)maxdiv));
double p2 = p*p;
#pragma acc atomic
Div_N[i] = Div_N[i] + 1;
#pragma acc atomic
Div_p[i] = Div_p[i] + p;
#pragma acc atomic
Div_p2[i] = Div_p2[i] + p2;
SCATTER;
}
}
if (restore_neutron) {
RESTORE_NEUTRON(INDEX_CURRENT_COMP, x, y, z, vx, vy, vz, t, sx, sy, sz, p);
}
%}
SAVE
%{
if(!nowritefile){
if (!vertical){
DETECTOR_OUT_1D(
"Horizontal divergence monitor","horizontal divergence [deg]",
"Intensity","divergence", -maxdiv, maxdiv, ndiv,
&Div_N[0],&Div_p[0],&Div_p2[0],filename);
}else{
DETECTOR_OUT_1D(
"Vertical divergence monitor","vertical divergence [deg]",
"Intensity","divergence", -maxdiv, maxdiv, ndiv,
&Div_N[0],&Div_p[0],&Div_p2[0],filename);
}
}
%}
FINALLY
%{
destroy_darr1d(Div_N);
destroy_darr1d(Div_p);
destroy_darr1d(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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