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/*****************************************************************************
* McStas instrument definition URL=http://www.mcstas.org
*
* Instrument: Samples_Phonon
*
* %Identification
* Written by: <a href="mailto:kim.lefmann@risoe.dk">Kim Lefmann</a>
* Date: Feb 2004
* Origin: <a href="http://www.risoe.dk/">RISOE</a>
* Written by: K. Lefmann <kim.lefmann@risoe.dk> RISOE, Feb 2004
* %INSTRUMENT_SITE: Tests_samples
*
* Simple test instrument for the Phonon_simple component
*
*
* %Description
* Simple test instrument for the Phonon_simple component.
* Refer to the component documentation for further instructions.
*
* %Example: E=10 -n 1e5 Detector: mon1_I=2.86265e-25
*
* %Parameters
* E: [meV] Mean energy at source
* DE: [meV] Energy spread at source
* HDIV: [deg] Horizontal divergence produced from source
* VDIV: [deg] Vertical divergence produced from source
* TT: [deg] Two-theta detetector-angle
* OM: [deg] Sample rotation angle
* C: [meV/AA^(-1)] Sample velocity of sound
*
* %End
******************************************************************************/
DEFINE INSTRUMENT Samples_Phonon(E=10, DE=0, HDIV=1e-4, VDIV=1e-4, TT=72.69, OM=-43.3, C=8)
TRACE
COMPONENT a1 = Progress_bar()
AT (0,0,0) ABSOLUTE
COMPONENT source = Source_div(
xwidth=0.0005, yheight=0.0005,
focus_aw=HDIV, focus_ah=VDIV,
E0 = E,
dE = DE)
AT (0,0,0) RELATIVE a1 ROTATED (0,0,0) RELATIVE a1
COMPONENT sample = Phonon_simple(
radius=0.01, yheight=0.02, focus_r=0.001,
target_index=+2,
sigma_abs=0.17, sigma_inc=0.003, b=0.90, M=208,
c=C, a=4.95, DW=1.00, T=300)
AT (0, 0, 1.00) RELATIVE a1 ROTATED (0,OM,0) RELATIVE a1
COMPONENT a2=Arm()
AT (0, 0, 0) RELATIVE sample ROTATED (0,TT,0) RELATIVE a1
COMPONENT mon1 = E_monitor(
nE = 400, filename = "e.dat", xmin = -0.01, xmax = 0.01,
ymin = -0.02, ymax = 0.02, Emin = 0, Emax = 40)
AT (0, 0, 1) RELATIVE a2
END
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