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McStas: Guide_curved

[ Identification | Description | Input parameters | Links ]

The Guide_curved Component

Non-focusing curved neutron guide.

Identification

  • Site:
  • Author: Ross Stewart
  • Origin: ILL (France).
  • Date: November 18 2003

Description

Models a rectangular curved guide tube with entrance centered on the Z axis.
The entrance lies in the X-Y plane.  Draws a true depiction
of the guide, and trajectories.  Guide is not focusing.

Example: Guide_curved(w1=0.1, h1=0.1, l=2.0, R0=0.99, Qc=0.021,
alpha=6.07, m=2, W=0.003, curvature=2700)

%BUGS
This component does not work with gravitation on. Use component Guide_gravity then.
Systematic error on transmitted flux is found to be about 10%.

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
w1mWidth at the guide entry
h1mHeight at the guide entry
lmlength of guide
R01Low-angle reflectivity0.995
QcAA-1Critical scattering vector0.0218
alphaAASlope of reflectivity4.38
m1m-value of material. Zero means completely absorbing.2
WAA-1Width of supermirror cut-off0.003
curvaturemRadius of curvature of the guide2700
AT ( , , ) RELATIVE
ROTATED ( , , ) RELATIVE

Links


[ Identification | Description | Input parameters | Links ]

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


Last Modified: Wednesday, 03-Jan-2024 19:59:10 CET
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