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/*******************************************************************************
*
* McXtrace, x-ray tracing package
* Copyright, All rights reserved
* DTU Physics, Kgs. Lyngby, Denmark
* Synchrotron SOLEIL, Saint-Aubin, France
*
* Component: PSD_monitor_4PI
*
* %Identification
* Written by: Erik Knudsen
* Date: June 23rd, 2009
* Origin: Risoe
* Release: McXtrace 0.1
*
* Spherical position-sensitive detector.
*
* %Description
* Based on neutron component by Kim Lefmann and Kristian Nielsen
* An (n times m) pixel spherical PSD monitor using a cylindrical projection.
* Mostly for test and debugging purposes.
*
* Example: PSD_monitor_4PI(radius=0.1,
* nx=90, ny=90, filename="Output.psd")
*
* %Parameters
* INPUT PARAMETERS:
* radius: [m] Radius of detector
* nx: [1] Number of pixel columns
* ny: [1] Number of pixel rows
* filename: [str] Name of file in which to store the detector image
* restore_xray: [1] If set, the monitor does not influence the xray state
*
* CALCULATED PARAMETERS:
*
* PSD_N: Array of xray counts
* PSD_p: Array of xray weight counts
* PSD_p2: Array of second moments
*
* %End
*******************************************************************************/
DEFINE COMPONENT PSD_monitor_4PI
SETTING PARAMETERS (radius=1, restore_xray=0, int nx=90, int ny=90, string filename=0)
DECLARE
%{
DArray2d PSD_N;
DArray2d PSD_p;
DArray2d PSD_p2;
%}
INITIALIZE
%{
int i,j;
PSD_N = create_darr2d(nx, ny);
PSD_p = create_darr2d(nx, ny);
PSD_p2 = create_darr2d(nx, ny);
// Use instance name for monitor output if no input was given
if (!strcmp(filename,"\0")) sprintf(filename,"%s",NAME_CURRENT_COMP);
%}
TRACE
%{
double l0, l1, psi, theta;
int i,j;
if(sphere_intersect(&l0, &l1, x, y, z, kx, ky, kz, radius) && l1 > 0)
{
if(l0 < 0)
l0 = l1;
/* l0 is the intersection length with the sphere. */
PROP_DL(l0);
psi = atan2(x,z);
i = floor(nx*(psi/(2*PI)+0.5));
if(i >= nx)
i = nx-1; /* Special case for psi = PI. */
else if(i < 0)
i = 0;
theta=asin(y/radius);
j = floor(ny*(theta+PI/2)/PI+0.5);
if(j >= ny)
j = ny-1; /* Special case for y = radius. */
else if(j < 0)
j = 0;
double p2 = p*p;
#pragma acc atomic
PSD_N[i][j] = PSD_N[i][j]+1 ;
#pragma acc atomic
PSD_p[i][j] = PSD_p[i][j] + p;
#pragma acc atomic
PSD_p2[i][j] = PSD_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
%{
DETECTOR_OUT_2D(
"4PI PSD monitor",
"Longitude [deg]",
"Lattitude [deg]",
-180, 180, -90, 90,
nx, ny,
&PSD_N[0][0],&PSD_p[0][0],&PSD_p2[0][0],
filename);
%}
FINALLY
%{
destroy_darr2d(PSD_N);
destroy_darr2d(PSD_p);
destroy_darr2d(PSD_p2);
%}
MCDISPLAY
%{
circle("xy",0,0,0,radius);
circle("xz",0,0,0,radius);
circle("yz",0,0,0,radius);
%}
END
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