/******************************************************************************* * * McStas, neutron ray-tracing package * Copyright 1997-2002, All rights reserved * Risoe National Laboratory, Roskilde, Denmark * Institut Laue Langevin, Grenoble, France * * Component: TOF_monitor * * %I * Written by: KN, M. Hagen * Date: August 1998 * Origin: Risoe * * Rectangular Time-of-flight monitor. * * %D * * %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 * nt: [1] Number of time bins * dt: [mu-s] Length of each time bin * tmin: [mu-s] Lower time limit * tmax: [mu-s] Upper time limit * 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: * * TOF_N: [] Array of neutron counts * TOF_p: [] Array of neutron weight counts * TOF_p2: [] Array of second moments * * %E *******************************************************************************/ DEFINE COMPONENT TOF_monitor DEFINITION PARAMETERS () SETTING PARAMETERS (nt=20, string filename=0, xmin=-0.05, xmax=0.05, ymin=-0.05, ymax=0.05, xwidth=0, yheight=0, tmin=0, tmax=0, dt=1.0, restore_neutron=0, int nowritefile=0) OUTPUT PARAMETERS () /* Neutron parameters: (x,y,z,vx,vy,vz,t,sx,sy,sz,p) */ DECLARE %{ DArray1d TOF_N; DArray1d TOF_p; DArray1d TOF_p2; double t_min; double t_max; double delta_t; %} 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("TOF_monitor: %s: Null detection area !\n" "ERROR (xwidth,yheight,xmin,xmax,ymin,ymax). Exiting", NAME_CURRENT_COMP); exit(0); } TOF_N = create_darr1d(nt); TOF_p = create_darr1d(nt); TOF_p2 = create_darr1d(nt); for (i=0; ixmin && xymin && y= 0 && i < nt) { double p2 = p*p; #pragma acc atomic TOF_N[i] = TOF_N[i]+1; #pragma acc atomic TOF_p[i] = TOF_p[i]+p; #pragma acc atomic TOF_p2[i] = TOF_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) { DETECTOR_OUT_1D( "Time-of-flight monitor", "Time-of-flight [\\gms]", "Intensity", "t", t_min, t_max, nt, &TOF_N[0],&TOF_p[0],&TOF_p2[0], filename); } %} FINALLY %{ destroy_darr1d(TOF_N); destroy_darr1d(TOF_p); destroy_darr1d(TOF_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