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

# The `Guide_curved` Component

Non-focusing curved neutron guide.

## Identification

- Author: Ross Stewart
- Origin:(Unknown)
- Date: November 18 2003
- Version:(Unknown)

## Description

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

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

    Example values: m=4 Qc=0.0219 W=1/300 alpha=6.49 R0=1 r=2700

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
--- | --- | --- | ---
w | m | Width at the guide entry |
h | m | Height at the guide entry |
l | m | length of guide |
R0 | 1 | Low-angle reflectivity | 0.99
Qc | AA-1 | Critical scattering vector | 0.0219
alpha | AA | Slope of reflectivity | 6.07
m | 1 | m-value of material. Zero means completely absorbing. | 2
W | AA-1 | Width of supermirror cut-off | 0.003
r | m | Radius of curvature of the guide | 2700

## Links

- Source code for `Guide_curved.comp`.

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