[ Identification | Description | Input parameters | Links ]

The ILL_H53_D16 Instrument

The D16 diffractometer/reflectometer on the H53 curved cold guide at the ILL

Identification

• Site: ILL
• Author: FARHI Emmanuel (farhi@ill.fr)
• Origin: ILL
• Date: Oct 7, 2008

Description

The H53 (120 x 60 mm2) curved cold guide feeds D16 (after IN14, and IN16).
D16 is a two-circle diffractometer. The primary white beam is reflected by a
focussing pyrolytic graphite monochromator (122 x 60 mm2 with mosaicity 0.7
deg) providing an important flux at the sample. The monochromator housing has
two beam holes at take-off angles of 90 deg and 115 deg, corresponding to 4.7
Angs and 5.6 Angs beams and incorporates the slit systems.

Example: m=1.2 Detector: Det_psd_I=6.4729E+03

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
lambda	Angs	Wavelength at monochromator, computed from DM and THETA_M if left as 0.	4.7
DM	Angs	d-spacing of monochromator, computed from lambda and THETA_M if left as 0.	3.355
dlambda	AA	wavelength half width.	0.05
Powder	str	File name for powder description.	"Na2Ca3Al2F14.laz"
RV	m	Monochromator vertical curvature, 0 for flat, -1 for automatic setting	-1
L1	m	Guide-Monochromator distance	0.1
L2	m	Monochromator-Sample distance	2.8
L3	m	Sample-Detector distance	1.0
THETA_M	deg	Monochromator take-off angle, computed from lambda and DM if left as 0.	44.46
TwoTheta	deg	Detector rotation (in plane)	0
RadiusDet	m	Detector entrance window radius	0.36
DetEthick	m	Detector entrance window thickness	.01
DetEgap	m	Detector entrance window gap to flat detector inner window	0.08
DetVthick	m	Detector active volume thickness	5e-3
verbose	1	Print DIF configuration. 0 to be quiet	1
TILT	deg	Monochromator additional tilt, for rocking curves	0

Links

• Source code for ILL_H53_D16.instr.
• The D16 diffractometer at the ILL

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[ Identification | Description | Input parameters | Links ]

Generated on 2022-12-12 13:20:16

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Last Modified: Wednesday, 09-Aug-2023 17:01:02 CEST