/******************************************************************************* * * McStas, neutron ray-tracing package * Copyright 1997-2002, All rights reserved * Risoe National Laboratory, Roskilde, Denmark * Institut Laue Langevin, Grenoble, France * * Component: PSD_monitor_psf * * %I * Written by: Kim Lefmann, Linda Udby * Date: Feb 3, 1998 * Updated: Oct 15, 2007 (with psf) * Origin: Risoe * * Position-sensitive monitor. * * %D * An (n times m) pixel PSD monitor. This component may also be used as a beam * detector. Models 1/k behaviour and efficiency, based on user defined k0 and eff parameters. * * 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/diameter of detector (x). Overrides xmin, xmax * yheight: [m] Height of detector (y). 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 * psf: [m] Point spread function, ray (x,y) coordinate randomized by gaussion of sigma psf * k0: [AA^-1] Numerator in k0/k weighting * eff: [1] Detector efficiency * 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_psf_eff DEFINITION PARAMETERS () SETTING PARAMETERS (nx=90, ny=90, string filename=0, xmin=0, xmax=0, ymin=0, ymax=0, int nowritefile=0, xwidth=0, yheight=0, psf=0, k0=1, eff=1, restore_neutron=0) OUTPUT PARAMETERS () DECLARE %{ DArray2d PSD_N; DArray2d PSD_p; DArray2d PSD_p2; double weight; %} INITIALIZE %{ int i, j; 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); for (i=0; ixmin && xpymin && yp