[ Identification | Description | Input parameters | Links ]
V_selector ComponentVelocity selector consisting of rotating Soller-like blades defining a helically twisted passage. Geometry defined by two identical, centered apertures at 12 o'clock position, Origo is at the centre of the selector (input is at -zdepth/2). Transmission is analytical assuming a continuous source. Example: V_selector(xwidth=0.03, yheight=0.05, zdepth=0.30, radius=0.12, alpha=48.298, length=0.25, d=0.0004, nu=20000, nslit=72) These are values for the D11@ILL Dornier 'Dolores' Velocity Selector (NVS 023) %VALIDATION Jun 2005: extensive external test, no problems found Validated by: K. Lieutenant
| Name | Unit | Description | Default | |
| xwidth | m | Width of entry aperture | 0.03 | |
| yheight | m | Height of entry aperture | 0.05 | |
| zdepth | m | Distance between apertures, for housing containing the rotor | 0.30 | |
| radius | m | Height from aperture centre to rotation axis | 0.12 | |
| alpha | deg | Twist angle along the cylinder | 48.298 | |
| length | m | Length of cylinder/rotor (less than zdepth) | 0.25 | |
| d | m | Thickness of blades | 0.0004 | |
| nu | Hz | Cylinder rotation speed, counter-clockwise, which is ideally 3956*alpha*DEG2RAD/2/PI/lambda/length | 300 | |
| nslit | 1 | Number of Soller blades | 72 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
V_selector.comp.
[ Identification | Description | Input parameters | Links ]
Generated on 2023-09-19 20:01:36