[ Identification | Description | Input 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 definition, 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(xwidth=.1, yheight=.1,R0=0.99,Qc=0.021,alpha=6.1,m=2,W=0.003)
| Name | Unit | Description | Default | |
| reflect | str | Name of reflectivity file. Format q(Angs-1) R(0-1) | 0 | |
| xwidth | m | width 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 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Mirror.comp.
[ Identification | Description | Input parameters | Links ]
Generated on 2024-01-03 11:47:43