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McStas: ILL_D4 Instrument at ILL

[ Identification | Description | Input parameters | Output parameters | Links ]

The ILL_D4 Instrument

D4 Diffractometer for liquids at the ILL.


  • Site: ILL
  • Author: E. Farhi
  • Origin: LLB/ILL
  • Date: 13 Apr 2006
  • Version:(Unknown)


D4 Diffractometer for liquids at the ILL, installed on the hot source.

The dedicated liquid and amorphous instrument D4 is a two-axis diffractometer
equipped with nine 1D position sensitive microstrip detectors. In this model,
a PSD banana detector is also present.

The monochromator take-off angle is 2Theta_M ~ 20-25 deg, variable. The available 
monochromators are all vertically focusing, Cu (200) for 0.7 Angs, Cu (220) 
for 0.5 Angs.

Cu       002 DM=1.807 AA
Cu       220 DM=1.278 AA

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
lambda Angs Wavelength at monochromator 0.7
DM Angs d-spacing of monochromator 1.807
sample str File name for powder/liquid description LAU/LAZ/qSq/Sqw "SiO2_liq.qSq"
RV m Monochromator vertical curvature, 0 for flat, -1 for automatic setting -1
L1 m Source-Monochromator distance 6.4
L2 m Monochromator-Sample distance 2.61
L3 m Sample-Detector distance 1.148
verbose 1 Print DIF configuration. 0 to be quiet 1


[ Identification | Description | Input parameters | Output parameters | Links ]

Generated automatically by McDoc, Peter Willendrup <> / Wed Jan 12 15:13:31 2022

Last Modified: Wednesday, 12-Jan-2022 16:13:31 CET
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