[ Identification | Description | Input parameters | Links ]
Bender ComponentModels a curved neutron guide with cylindrical walls. Bender radius, entrance width and height are necessary input data. To define the bender, you may either enter the deviation angle 'Win' or the length 'l'. The bender may consist of 'k' vertical channels, separated by partitioning walls of thickness 'd'. Three different reflectivity profiles can be given: for outer walls, for inner walls and for the top and bottom walls. The partitioning walls have the same coating as the exterior walls. The entrance lies in the X-Y plane, centered on the Z axis. The neutrons will also leave the bender in the X-Y plane at the z-value l=r*Win, i.e. they are centred on (0,0,r*Win); they have an (average) flight direction along the z-axis. Therefore, the following component is adjacent, if positioned AT (0,0,r*Win) without rotation. So, seen from outside, it behaves like a straight guide along the Z axis. As a consequence, it is shown straight in 'mcdisplay'. This behaviour results from a co-ordinate transformation inside the component. It is done to facilitate its use. Neither rotation nor shift along the x-axis need to be calculated; a new arm is not necessary. Internally, the bender is bent to the negative X axis; Example: Bender of 120 mm height, 50 mm width, 250 m radius and 0.04 rad (or 2.292 deg) curvature not channeled, with a standard m=2 coating on Bender(w=0.05,h=0.12,r=250,Win=0.04, R0a=0.99,Qca=0.021,alphaa=6.07,ma=2,Wa=0.003, R0i=0.99,Qci=0.021,alphai=6.07,mi=2,Wi=0.003, R0s=0.99,Qcs=0.021,alphas=6.07,ms=2,Ws=0.003) %BUGS Some users have reported potentially strange behaviours with this component. This component does not work with gravitation on.
| Name | Unit | Description | Default | |
| w | m | Width at the bender entry and exit | ||
| h | m | Height at the bender entry and exit | ||
| r | m | Radius of the bender | ||
| Win | rad | Angle of the deflection of the whole bender | 0.04 | |
| k | 1 | Number of channels inside the bender | 1 | |
| d | m | Thickness of one blade separating the channels | 0.001 | |
| l | m | length of bender l=r*Win | 0 | |
| R0a | 1 | Low-angle reflectivity at the outer side of the bender | 0.99 | |
| Qca | AA-1 | Critical scattering vector | 0.021 | |
| alphaa | AA | Slope of reflectivity | 6.07 | |
| ma | 1 | m-value of material | 2 | |
| Wa | AA-1 | Width of supermirror cut-off | 0.003 | |
| R0i | 1 | Low-angle reflectivity at the inner side of the bender | 0.99 | |
| Qci | AA-1 | Critical scattering vector | 0.021 | |
| alphai | AA | Slope of reflectivity | 6.07 | |
| mi | 1 | m-value of material | 2 | |
| Wi | AA-1 | Width of supermirror cut-off | 0.003 | |
| R0s | 1 | Low-angle reflectivity at the top and bottom side of the bender | 0.99 | |
| Qcs | AA-1 | Critical scattering vector | 0.021 | |
| alphas | AA | Slope of reflectivity | 6.07 | |
| ms | 1 | m-value of material | 2 | |
| Ws | AA-1 | Width of supermirror cut-off | 0.003 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Bender.comp.
[ Identification | Description | Input parameters | Links ]
Generated on 2024-01-03 11:47:43