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/*******************************************************************************
* McXtrace instrument definition URL=http://www.mcxtrace.org
*
* Instrument: ESRF_BM29
*
* %Identification
* Written by: Martin Cramer Pedersen (mcpe@nbi.dk)
* Date: October 28th, 2021
* Version: $Revision$
* Origin: KU-Science
* Release: McXtrace 1.0
* %INSTRUMENT_SITE: ESRF
*
* A simple BM29 model at ESRF.
*
* %Description
* Toy model used for testing various sample components for solution-SAXS
* mimicking the geometry of the BM29 beamline at ESRF:
* https://www.esrf.fr/home/UsersAndScience/Experiments/MX/About_our_beamlines/bm29/beamline-specifications.html
*
* Note that this model does not include much of the beamline optics, instead it emulates their effect
* by settgin relevant beam parameters from a model source.
*
* %Example: ESRF_BM29.instr Lambda=1 Detector: QMonitor_I=5.2e-12
*
* %Parameters
* DistanceFromSourceToFirstPinhole: [m] Distance to first pinhole from source.
* DistanceFromSourceToSecondPinhole: [m] Distance to second pinhole - used for focussing rays.
* DistanceFromSecondPinholeToSample: [m] Collimation length.
* DistanceFromSampleToDetector: [m] Sample-detector-distance.
* RadiusOfDetector: [m] Radius of the circular detector.
* Lambda: [AA] Wavelength of the rays emitted from source.
* DLambda: [] Relative deviation of wavelength of the rays emitted from source.
*
* %End
*******************************************************************************/
DEFINE INSTRUMENT ESRF_BM29(
DistanceFromSourceToFirstPinhole = 31.4,
DistanceFromSourceToSecondPinhole = 42.5,
DistanceFromSecondPinholeToSample = 0.1,
DistanceFromSampleToDetector = 2.43,
RadiusOfDetector = 0.18,
Lambda = 1.00,
DLambda = 0.01
)
DECLARE
%{
%}
INITIALIZE
%{
%}
TRACE
COMPONENT Origin = Progress_bar(
)
AT (0, 0, 0) ABSOLUTE
COMPONENT Source = Source_flat(
xwidth = 0.001,
yheight = 0.001,
dist = DistanceFromSourceToSecondPinhole,
focus_yh = 0.0007,
focus_xw = 0.0007,
lambda0 = Lambda,
dlambda = DLambda * Lambda
)
AT (0, 0, 0) RELATIVE Origin
COMPONENT FirstPinhole = Slit(
xwidth = 0.0007,
yheight = 0.0007
)
AT (0, 0, DistanceFromSourceToFirstPinhole) RELATIVE Source
COMPONENT SecondPinhole = Slit(
xwidth = 0.0007,
yheight = 0.0007
)
AT (0, 0, DistanceFromSourceToSecondPinhole) RELATIVE Source
COMPONENT Sample = SAXSSpheres(
xwidth = 0.01,
yheight = 0.01,
zdepth = 0.01,
R = 50.0,
SampleToDetectorDistance = DistanceFromSampleToDetector,
DetectorRadius = RadiusOfDetector
)
AT(0, 0, DistanceFromSampleToDetector) RELATIVE SecondPinhole
COMPONENT Beamstop = Beamstop(
radius = 0.001
)
AT (0, 0, DistanceFromSampleToDetector - 0.000001) RELATIVE Sample
COMPONENT QMonitor = SAXSQMonitor(
RadiusDetector = RadiusOfDetector,
DistanceFromSample = DistanceFromSampleToDetector,
LambdaMin = Lambda,
Lambda0 = Lambda,
NumberOfBins = 1000
)
AT (0, 0, 0.000001) RELATIVE Beamstop
FINALLY
%{
%}
END
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