[ Identification | Description | Input parameters | Output parameters | Links ]
Mirror
ComponentSingle mirror plate (used to build guides in compound components). The component Mirror models a single rectangular neutron mirror plate. It can be used as a sample component or to e.g. assemble a complete neutron guide by putting multiple mirror components at appropriate locations and orientations in the instrument deļ¬nition, much like a real guide is build from individual mirrors. Additionally, it may be centered in order to be used as a sample or monochromator plate, else it starts from AT position. Reflectivity is either defined by an analytical model (see Component Manual) or from a two-columns file with q [Angs-1] as first and R [0-1] as second. In the local coordinate system, the mirror lies in the first quadrant of the x-y plane, with one corner at (0, 0, 0). Plane is thus perpendicular to the incoming beam, and should usually be rotated. Example: Mirror(xlength=.1, yheight=.1,R0=0.99,Qc=0.021,alpha=6.1,m=2,W=0.003) Example values: m=4 Qc=0.02 W=1/300 alpha=6.49 R0=1
Name | Unit | Description | Default |
---|---|---|---|
reflect | str | Name of relfectivity file. Format [q(Angs-1) R(0-1)] | 0 |
xlength | m | length of mirror plate | |
yheight | m | height of mirror plate | |
R0 | 1 | Low-angle reflectivity | 0.99 |
Qc | AA-1 | Critical scattering vector | 0.021 |
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 |
center | 1 | if true (1), the Mirror is centered arount AT position. | 0 |
transmit | 1 | When true, non reflected neutrons are transmitted through the mirror, instead of being absorbed. | 0 |
Name | Unit | Description | Default |
---|---|---|---|
pTable |
Mirror.comp
.
[ Identification | Description | Input parameters | Output parameters | Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Feb 11 10:12:09 2011