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/*******************************************************************************
* McStas instrument definition URL=http://www.mcstas.org
*
* Instrument: Test Single Crystal output
*
* %Identification
* Written by: P. Willendrup
* Date: October 1st 2020
* Origin: DTU
* %INSTRUMENT_SITE: Tests_samples
*
* Test output of Single Crystal on a spherical monitor.
*
* %Description
* A test instrument to compare Monitor_nD output against basic 1D and 2D monitors.
*
* %Example: lambda=5 directbeam=0 Detector: Sph_mon_I=7.2e+7
* %Example: lambda=5 directbeam=0 SPLITS=5 Detector: Sph_mon_I=7.2e+7
* %Example: lambda=5 directbeam=0 SPLITS=10 Detector: Sph_mon_I=7.2e+7
* %Example: lambda=5 order=1 directbeam=0 Detector: Sph_mon_I=7.2e+7
* %Example: lambda=5 order=1 directbeam=0 SPLITS=5 Detector: Sph_mon_I=7.2e+7
* %Example: lambda=5 order=1 directbeam=0 SPLITS=10 Detector: Sph_mon_I=7.2e+7
*
* %Parameters
* lambda: [Angs] Central wavelength emitted from source
* dlambda: [Angs] Witdth of wavelength spectrom emitted from source
* L1: [m] Source-sample distance
* directbeam: [1] Suppress direct beam or not
* reflections: [str] File name for reflection list
* SPLITS: [1] Number of SPLIT's before sample
* order: [ ] Maximum order of multiple scattering, Single_crystal
* inc: [barns] Incoherent cross-section
* trans: [ ] Fraction of statistics assigned to transmitted beam
* omega: [deg] Rotation angle of sample
* beamstop: [ ] Toggle beamstop
*
* %End
*******************************************************************************/
DEFINE INSTRUMENT Test_SX(lambda=5, dlambda=9.8, L1=30, int directbeam=0, beamstop=0, string reflections="YBaCuO.lau", int SPLITS=1, order=0, inc=0, trans=0.001, omega=0)
DECLARE %{
int DirectBeam;
#pragma acc declare create(DirectBeam)
%}
USERVARS %{
int Type;
%}
/* The INITIALIZE section is executed when the simulation starts */
/* (C code). You may use them as component parameter values. */
INITIALIZE
%{
DirectBeam = directbeam;
#pragma acc update device(DirectBeam)
%}
/* Here comes the TRACE section, where the actual */
/* instrument is defined as a sequence of components. */
TRACE
REMOVABLE COMPONENT Origin = Progress_bar()
AT (0,0,0) ABSOLUTE
/* source with constant flux */
REMOVABLE COMPONENT Source = Source_gen(
radius = 0.11, dist = L1, focus_xw = 0.01, focus_yh = 0.01,
lambda0 = lambda, dlambda = dlambda/2.0,
T1=229.6,I1=5.32e13,T2=1102, I2=4.37e12, T3=437.1,I3=3.84e13)
AT (0, 0, 0) RELATIVE Origin
/* Incoming beam */
COMPONENT PSD = PSD_monitor(filename="incoming",xwidth=0.02, yheight=0.02)
AT (0, 0, L1-0.02) RELATIVE Origin
/* TIP: monochromator cradle */
COMPONENT sample_cradle = Arm()
AT (0, 0, L1) RELATIVE Origin
SPLIT SPLITS COMPONENT SX = Single_crystal(xwidth=0.01, yheight=0.01, zdepth=0.01,reflections=reflections, mosaic=10, delta_d_d=1e-4, order=order, sigma_inc=inc, p_transmit=trans)
AT (0, 0, 0) RELATIVE sample_cradle
ROTATED (0,omega,0) RELATIVE sample_cradle
EXTEND %{
Type=itype;
if (DirectBeam==0) {
if(!SCATTERED) ABSORB;
}
%}
COMPONENT Full_mon = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="FULL")
AT (0, 0, 0) RELATIVE sample_cradle
COMPONENT Sph_tun = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="tun")
WHEN (Type==1) AT (0, 0, 0) RELATIVE sample_cradle
COMPONENT PSDBS = PSD_monitor(filename="BS0",xwidth=0.04, yheight=0.04, restore_neutron=1)
WHEN(beamstop) AT (0, 0, 0.5) RELATIVE sample_cradle
COMPONENT BeamStop = Beamstop(radius=0.1)
WHEN (beamstop) AT (0,0,0.5) RELATIVE sample_cradle
COMPONENT Sph_mon = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="Tot")
AT (0, 0, 0) RELATIVE sample_cradle
COMPONENT Sph_coh = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="coh")
WHEN (Type==3) AT (0, 0, 0) RELATIVE sample_cradle
COMPONENT Sph_inc = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="inc")
WHEN (Type==2) AT (0, 0, 0) RELATIVE sample_cradle
/* The END token marks the instrument definition end */
END
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