/******************************************************************************* * * McStas, neutron ray-tracing package * Copyright 1997-2002, All rights reserved * Risoe National Laboratory, Roskilde, Denmark * Institut Laue Langevin, Grenoble, France * * Component: EPSD_monitor.comp * * %I * Written by: Kim Lefmann * Date: 16.4.00 * Origin: Risoe * * A monitor measuring neutron intensity vs. position, x, and neutron energy, E * * %D * * A monitor measuring neutron intensity vs. position, x, and neutron energy, E * * Example: EPSD_monitor(xmin=-0.1, xmax=0.1, ymin=-0.1, ymax=0.1, * Emin=1, Emax=50, nx=20, nE=20, filename="Output.poe") * * %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. * Emin: [meV] Lower bound of energy * Emax: [meV] Upper bound of energy * nx: [1] Number of pixel columns in scattering plane * nE: [1] Number of energy bins * 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 EPSD_monitor DEFINITION PARAMETERS () SETTING PARAMETERS (nx=20, nE=20, string filename=0, xmin=-0.05, xmax=0.05, ymin=-0.05, ymax=0.05, int nowritefile=0, xwidth=0, yheight=0, Emin, Emax, restore_neutron=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 %{ 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("EPSD_monitor: %s: Null detection area !\n" "ERROR (xwidth,yheight,xmin,xmax,ymin,ymax). Exiting", NAME_CURRENT_COMP); exit(0); } PSD_N = create_darr2d(nx, nE); PSD_p = create_darr2d(nx, nE); PSD_p2 = create_darr2d(nx, nE); for (i=0; ixmin && xymin && yEmin && E