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/*******************************************************************************
* McStas instrument definition URL=http://www.mcstas.org
*
* Instrument: reflectometer
*
* %Identification
* Written by: Pia Jensen (bozack@bozack.dk)
* Date: 13.08.2012
* Origin: Niels Bohr Instute, University of Copenhagen
* Release: McStas 2.x
* Version: 0.2
* %INSTRUMENT_SITE: e-learning
*
* Simple reflectometer with two slits, a sample (either none, mirror or multilayer),
* and a detector. For use in the OMIC summer school 2012.
*
* %Description
* This simple reflectometer consists of a source (using the standard PSI parameters
* for three Maxwellian distributions), on which the user can control the bandwidth
* by simply choosing a minumum and maximum value. Two slits handle the divergence
* distribution on the sample. The sample itself can either be an empty spot, a simple
* mirror, or a multilayer. A simple PSD detector is used for detecting the scattered
* beam. The scattering is in the horizontal plane.
*
* Example: mcrun reflectometer.instr <parameters=values>
*
* %Parameters
* lambda_min: [AA] Minimum wavelength from source
* lambda_max: [AA] Maximum wavelength from source
* slittranslation: [m] Translation of slit (horizontal)
* sampletranslation: [m] Sample translation (horizontal)
* slitwidth: [m] Width of slit pinholes
* slitheight: [m] Height of slit pinholes
* dist_source2slit: [m] Distance between source and first slit
* dist_slit2slit: [m] Distance between slits
* dist_slit2sample: [m] Distance between second slit and sample
* dist_sample2detector: [m] Distance between sample and detector
* sampletype: [1] Sample type: 0 none, 1 mirror, 2+ multilayer
* samplesize: [m] Side-length of the (quadratic) sample plate
* substratethickness: [m] Thickness of the substrate
* MR_Qc: [AA] Critical Q-vector length of mirror sample
* sampleangle: [deg] Rotation angle of sample (theta)
* detectorangle: [deg] Rotation angle of detector (2 theta)
*
* The sample types are as follows:
* 0 no sample (for looking at direct beam)
* 1 simple mirror (for alignment purposes)
* 2 d54DMPC-D2O
* 3 d54DMPC-H2O
* 4 hDMPC-D2O
* 5 hDMPC-H2O
* 6 silicon-D2O
* 7 silicon-H2O
*
* %End
*******************************************************************************/
DEFINE INSTRUMENT Reflectometer(
lambda_min = 5.3,
lambda_max = 5.45,
slittranslation = 0,
sampletranslation = 0,
slitwidth = 0.001,
slitheight = 0.002,
dist_source2slit = 1,
dist_slit2slit = 3.2,
dist_slit2sample = 0.18,
dist_sample2detector = 2,
sampletype = 1,
samplesize = 0.15,
substratethickness = 0.003,
MR_Qc = 0.15,
sampleangle = 2.5,
detectorangle = 5
)
DECLARE
%{
double blocktranslation;
%}
INITIALIZE
%{
blocktranslation = -slittranslation;
%}
// Begin instrument
TRACE
// Origin
COMPONENT Origin = Progress_bar()
AT (0,0,0) ABSOLUTE
// Source (so far just with the PSI source distribution)
COMPONENT Source = Source_Maxwell_3(
size = 0.12,
Lmin = lambda_min,
Lmax = lambda_max,
dist = dist_source2slit+dist_slit2slit,
focus_xw = slitwidth, focus_yh = slitheight,
T1 = 150.42, T2 = 38.72, T3 = 14.84,
I1 = 3.67E11, I2 = 3.64E11, I3 = 0.95E11)
AT (0, 0, 0) RELATIVE Origin
/*COMPONENT mon_PSD_atSource = PSD_monitor(
nx = 100, ny = 100,
filename = "mon_PSD_atSource.dat",
xwidth = 0.2, yheight = 0.2,
restore_neutron = 1)
AT (0, 0, 0.01) RELATIVE Source
COMPONENT mon_div_atSource = Divergence_monitor(
nh = 100, nv = 100,
filename = "mon_div_atSource",
restore_neutron = 1,
xwidth = 0.2, yheight = 0.2,
maxdiv_h = 10, maxdiv_v = 10)
AT (0, 0, 1e-6) RELATIVE PREVIOUS
COMPONENT mon_Lmon_atSource = L_monitor(
nL = 100,
filename = "mon_Lmon_atSource.dat",
xwidth = 0.2, yheight = 0.2,
Lmin = 0, Lmax = 22,
restore_neutron = 1)
AT (0, 0, 1e-6) RELATIVE PREVIOUS
*/
// First slit
COMPONENT Slit1 = Slit(
xwidth = slitwidth, yheight = slitheight)
AT (0, 0, dist_source2slit) RELATIVE Source
/*
COMPONENT mon_PSD_afterSlit1 = PSD_monitor(
nx = 100, ny = 100,
filename = "mon_PSD_afterslit1.dat",
xwidth = slitwidth+0.1, yheight = slitheight+0.1,
restore_neutron = 1)
AT (0, 0, 0.01) RELATIVE Slit1
COMPONENT mon_div_afterSlit1 = Divergence_monitor(
nh = 100, nv = 100,
filename = "mon_div_afterSlit1",
restore_neutron = 1,
xwidth = slitwidth+0.1, yheight = slitheight+0.1,
maxdiv_h = 10, maxdiv_v = 10)
AT (0, 0, 1e-6) RELATIVE PREVIOUS
COMPONENT mon_Lmon_afterSlit1 = L_monitor(
nL = 100,
filename = "mon_Lmon_afterSlit1.dat",
xwidth = slitwidth+0.1, yheight = slitheight+0.1,
Lmin = 0, Lmax = 22,
restore_neutron = 1)
AT (0, 0, 1e-6) RELATIVE PREVIOUS
*/
// Second slit
COMPONENT Slit2 = Slit(
xwidth = slitwidth, yheight = slitheight)
AT (0, 0, dist_slit2slit) RELATIVE Slit1
/*COMPONENT mon_PSD_afterSlit2 = PSD_monitor(
nx = 100, ny = 100,
filename = "mon_PSD_afterslit2.dat",
xwidth = slitwidth+0.1, yheight = slitheight+0.1,
restore_neutron = 1)
AT (0, 0, 0.01) RELATIVE Slit2
COMPONENT mon_div_afterSlit2 = Divergence_monitor(
nh = 100, nv = 100,
filename = "mon_div_afterSlit2",
restore_neutron = 1,
xwidth = slitwidth+0.1, yheight = slitheight+0.1,
maxdiv_h = 10, maxdiv_v = 10)
AT (0, 0, 1e-6) RELATIVE PREVIOUS
COMPONENT mon_Lmon_afterSlit2 = L_monitor(
nL = 100,
filename = "mon_Lmon_afterSlit2.dat",
xwidth = slitwidth+0.1, yheight = slitheight+0.1,
Lmin = 0, Lmax = 22,
restore_neutron = 1)
AT (0, 0, 1e-6) RELATIVE PREVIOUS
*/
// Sample position and rotation arms
COMPONENT Arm_sampleNOROTNOTRANS = Arm()
AT (blocktranslation, 0, dist_slit2sample) RELATIVE Slit2
COMPONENT Arm_sampleNOROT = Arm()
AT (sampletranslation, 0, 0) RELATIVE Arm_sampleNOROTNOTRANS //Slit2 //??
COMPONENT Arm_sample = Arm()
AT (0, 0, 0) RELATIVE Arm_sampleNOROT
ROTATED (0, sampleangle, 0) RELATIVE Arm_sampleNOROT // originally Source...
// MIRROR sample
COMPONENT Sample_Mirror = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
R0 = 0.99, Qc = MR_Qc, alpha = 6.07, m = 1, W = 0.003)
WHEN (sampletype == 1) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
COMPONENT Sample_Mirror_backside = Isotropic_Sqw(
rho=1/13.827, sigma_abs=500.08, sigma_inc=4.935, sigma_coh=0,
xwidth = samplesize, yheight = samplesize, zdepth = substratethickness)
WHEN (sampletype == 1) AT (0, 0, -substratethickness/2-1e-6) RELATIVE Sample_Mirror
// MULTILAYER samples
COMPONENT Sample_Multilayer1 = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
reflect = "d54DMPC-D2O.dat")
WHEN (sampletype == 2) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
COMPONENT Sample_Multilayer2 = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
reflect = "d54DMPC-H2O.dat")
WHEN (sampletype == 3) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
COMPONENT Sample_Multilayer3 = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
reflect = "hDMPC-D2O.dat")
WHEN (sampletype == 5) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
COMPONENT Sample_Multilayer4 = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
reflect = "hDMPC-H2O.dat")
WHEN (sampletype == 6) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
COMPONENT Sample_Multilayer5 = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
reflect = "silicon-D2O.dat")
WHEN (sampletype == 6) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
COMPONENT Sample_Multilayer6 = Mirror(
xwidth = samplesize, yheight = samplesize, center = 1,
reflect = "silicon-H2O.dat")
WHEN (sampletype == 7) AT (0, 0, 0) RELATIVE Arm_sample
ROTATED (0, 90, 0) RELATIVE Arm_sample
// Detector
COMPONENT Arm_detectorONLYROT = Arm()
AT (0, 0, 0) RELATIVE Arm_sampleNOROTNOTRANS
ROTATED (0, detectorangle, 0) RELATIVE Source
COMPONENT Arm_detector = Arm()
AT (0, 0, dist_sample2detector) RELATIVE Arm_detectorONLYROT
COMPONENT Detector = PSD_monitor(
nx = 200, ny = 200,
filename = "mon_detector",
restore_neutron = 1,
xwidth = 0.025, yheight = 0.05)
AT (0, 0, 0) RELATIVE Arm_detector
FINALLY
%{
%}
END
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