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

The ILL_D9 Instrument

The D9 hot diffractometer at the ILL.

Identification

Description

The hot neutron four-circle diffractometer D9 at the ILL.
For structural analysis beyond the determination of average atomic positions,
high resolution nuclear density maps are required. D9 is ideally suited for
this purpose. Because of the short wavelength very small atomic displacements
can be identified, accurate to typically 0.001 Å. A two-dimensional
multidetector is employed. 
This simulation uses a quartz single crystal sample.

NOTE: as no transmission monochromator component is presently available, 
this simulation uses a monochromator in reflection, the width of which is
automatically adjusted so that the outcoming beam has the same width as 
that of a 6.5 cm wide transmission monochromator at the same take-off angle

example (single image on detector): 
  mcrun D9_instr -n 1e8 Lambda=0.65 TwoTheta=60 Nu=15 delta_Omega=0 

example (peak scan): 
  mcrun D9_instr -n 1e7 Lambda=0.65 TwoTheta=60 Nu=0 
    delta_Omega=-1.8,1.8 -N 31 -d Scan_0.65_60_0

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
Lambda Angstrom wavelength 0.65
TwoTheta degree 2-Theta of sample reflection 60
Nu degree lifting-arm angle 15
delta_Omega degree start,end of omega scan 0

Links


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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Feb 28 2006