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McStas: ILL_D4

[ Identification | Description | Input parameters | Links ]

The ILL_D4 Instrument

D4 Diffractometer for liquids at the ILL.

Identification

  • Site: ILL
  • Author: E. Farhi
  • Origin: LLB/ILL
  • Date: 13 Apr 2006

Description

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.
NameUnitDescriptionDefault
lambdaAngsWavelength at monochromator0.7
DMAngsd-spacing of monochromator1.807
samplestrFile name for powder/liquid description LAU/LAZ/qSq/Sqw"SiO2_liq.qSq"
RVmMonochromator vertical curvature, 0 for flat, -1 for automatic setting-1
L1mSource-Monochromator distance6.4
L2mMonochromator-Sample distance2.61
L3mSample-Detector distance1.148
verbose1Print DIF configuration. 0 to be quiet1

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[ Identification | Description | Input parameters | Links ]

Generated on 2023-09-19 20:01:36


Last Modified: Tuesday, 16-Apr-2024 20:05:20 CEST
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