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

The Powder1 component

General powder sample with a single scattering vector.

Identification

• Author: E.M.Lauridsen, N.B.Christensen, A.B.Abrahamsen
• Origin: McStas release
• Date: 4.2.98
• Version: 1.8
• Modification history:
  • KL, KN 20.3.98 (rewrite)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
d_phi0	deg	Focussing angle corresponding to the vertical dimensions of the detector placed at the right distance
radius	m	Radius of sample in (x,z) plane
h	m	Height of sample y direction
pack	1	Packing factor
Vc	AA^3	Volume of unit cell
sigma_a	fm^2	Absorption cross section per unit cell at 2200 m/s
j	1	Multiplicity of reflection
q	AA^-1	Scattering vector of reflection
F2	fm^2	Structure factor of reflection
DW	1	Debye-Waller factor of reflection
target_x
target_y	m	position of target to focus at
target_z

Output parameters

Name	Unit	Description	Default
my_s_v2
my_a_v
q_v

Links

• Source code for Powder1.comp.
• Old description, with explanation of focusing.
• Test results (not up-to-date).

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

Generated automatically by McDoc, Kristian Nielsen <kristian.nielsen@risoe.dk> / Jan 22 2001

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Last Modified: Tuesday, 22-Jun-2004 14:04:09 CEST