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/*******************************************************************************
* McStas instrument definition URL=http://www.mcstas.org
*
* Instrument: Test PowderN output
*
* %Identification
* Written by: P. Willendrup
* Date: October 1st 2020
* Origin: DTU
* %INSTRUMENT_SITE: Tests_samples
*
* Test output of PowderN on a spherical monitor.
*
* %Description
* A test instrument for PowderN output on a spherical monitor.
*
* %Example: lambda=1 Detector: Sph_sum_I=4.93378e+09
* %Example: lambda=1 Detector: Sph_front_I=3.35878e+08
* %Example: lambda=1 Detector: Sph_sample_I=7.28574e+08
* %Example: lambda=1 Detector: Sph_back_I=2.73695e+08
*
* %Parameters
* lambda: [Angs] Wavelength emitted from source, 1% wl-interval around.
* L1: [m] Source-sample distance
* directbeam: [1] Suppress direct beam or not
* reflections: [str] List of powder reflections
* SPLITS: [1] Number of SPLIT's before sample
* frac_c: [1] Fraction of stats assigned to coherent scattering (auto-computed if left at 0)
* frac_i: [1] Fraction of stats assigned to incoherent scattering
* frac_t: [1] Fraction of stats assigned to unscattered, "direct beam"
*
* %End
*******************************************************************************/
DEFINE INSTRUMENT Test_PowderN_concentric(lambda=1, L1=10, int directbeam=1, string reflections="Fe.laz", int SPLITS=1)
USERVARS %{
double Sp0;
double Sp1;
double Sp2;
%}
/* The INITIALIZE section is executed when the simulation starts */
/* (C code). You may use them as component parameter values. */
INITIALIZE
%{
%}
/* 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 = 0.1,
lambda0 = lambda, dlambda = lambda*0.01,
T1=229.6,I1=5.32e13,T2=1102, I2=4.37e12, T3=437.1,I3=3.84e13)
AT (0, 0, 0) RELATIVE Origin
/* TIP: monochromator cradle */
SPLIT SPLITS COMPONENT sample_cradle = Arm()
AT (0, 0, L1) RELATIVE PREVIOUS
COMPONENT Pow0 = PowderN(radius=0.005, thickness=0.001, yheight=0.1, reflections=reflections, p_inc=0.1, p_transmit=0.5, d_phi=0, concentric=1)
AT (0, 0, 0) RELATIVE sample_cradle
EXTEND %{
if (SCATTERED) {
Sp0=1;
} else {
Sp0=0;
}
%}
COMPONENT Pow = PowderN(radius=0.004, yheight=0.1, reflections=reflections, p_inc=0.1, p_transmit=0.1)
AT (0, 0, 0) RELATIVE sample_cradle
EXTEND %{
if(INSTRUMENT_GETPAR(directbeam) == 0) {
if (!SCATTERED) {
ABSORB;
}
}
if (SCATTERED) {
Sp1=1;
} else {
Sp1=0;
}
%}
COMPONENT Pow2 = PowderN(radius=0.005, thickness=0.001, yheight=0.1, reflections=reflections, p_inc=0.1, p_transmit=0.8, d_phi=0, concentric=0)
AT (0, 0, 0) RELATIVE sample_cradle
EXTEND %{
if (SCATTERED) {
Sp2=1;
} else {
Sp2=0;
}
%}
COMPONENT Sph_sum = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="Sum")
AT (0, 0, 0) RELATIVE PREVIOUS
COMPONENT Sph_front = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="Front")
WHEN(Sp0==1) AT (0, 0, 0) RELATIVE PREVIOUS
COMPONENT Sph_sample = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="Sample")
WHEN(Sp1==1) AT (0, 0, 0) RELATIVE PREVIOUS
COMPONENT Sph_back = PSD_monitor_4PI(nx=100,ny=100, radius=1, restore_neutron=1, filename="Back")
WHEN(Sp2==1) AT (0, 0, 0) RELATIVE PREVIOUS
/* The END token marks the instrument definition end */
END
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