/******************************************************************************* * * McStas, neutron ray-tracing package * Copyright 1997-2002, All rights reserved * Risoe National Laboratory, Roskilde, Denmark * Institut Laue Langevin, Grenoble, France * * Component: PSD_monitor * * %I * Written by: Kim Lefmann * Date: Feb 3, 1998 * Origin: Risoe * * Position-sensitive monitor. * * %D * An (n times m) pixel PSD monitor. This component may also be used as a beam * detector. * * Example: PSD_monitor(xmin=-0.1, xmax=0.1, ymin=-0.1, ymax=0.1, nx=90, ny=90, filename="Output.psd") * * %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 * nx: [1] Number of pixel columns * ny: [1] Number of pixel rows * filename: [string] 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 * * OUTPUT PARAMETERS: * * PSD_N: [] Array of neutron counts * PSD_p: [] Array of neutron weight counts * PSD_p2: [] Array of second moments * * %E *******************************************************************************/ DEFINE COMPONENT PSD_monitor DEFINITION PARAMETERS () SETTING PARAMETERS (nx=90, ny=90, string filename=0, xmin=-0.05, xmax=0.05, ymin=-0.05, ymax=0.05, xwidth=0, yheight=0, restore_neutron=0, int nowritefile=0) OUTPUT PARAMETERS () /* Neutron parameters: (x,y,z,vx,vy,vz,t,sx,sy,sz,p) */ DECLARE %{ DArray2d PSD_N; DArray2d PSD_p; DArray2d PSD_p2; %} INITIALIZE %{ if (xwidth > 0) { xmax = xwidth/2; xmin = -xmax; } if (yheight > 0) { ymax = yheight/2; ymin = -ymax; } if ((xmin >= xmax) || (ymin >= ymax)){ printf("PSD_monitor: %s: Null detection area !\n" "ERROR (xwidth,yheight,xmin,xmax,ymin,ymax). Exiting", NAME_CURRENT_COMP); exit(0); } 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,NAME_CURRENT_COMP); %} TRACE %{ PROP_Z0; if (x>xmin && xymin && y