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[ Identification | Description | Input parameters | Links ]
The Multilayer_elliptic Component
Elliptic multilayer mirror (in XZ)
Identification
- Site:
- Author: Jana Baltser, Peter Willendrup, Anette Vickery, Andrea Prodi, Erik Knudsen
- Origin: NBI
- Date: February 2011
Description
Reads reflectivity values from a data input file (Ref.dat) for a Si/W multilayer. The multilayer code reflects ray in an ideal geometry, does not include surface imperfections The mirror is positioned such that the long axis of the mirror elliptical surface coincides with z-axis The algorithm: Incoming photon's coordinates and direction (k-vector) are transformed into an elliptical reference frame (elliptical parameters are calculated according to the mirror's position and its focusing distances and the incident angle), the intersection point is then defined. A new, reflected photon is then starting at the point of intersection. Example: Multilayer_elliptic( coating = "Ref_W_B4C.txt", theta = 1.2, s1 = 1, s2 = 2, length = 0.1, width = 0.1, R0 = 1, Emin=7, Emax=10, Estep=0.05)
Input parameters
Parameters in boldface are required; the others are optional.| Name | Unit | Description | Default | |
| coating | str | Datafile containing reflectivity values as a function of q and E. | "Ref_W_B4C.txt" | |
| theta | deg | Design angle of incidence. | 1.2 | |
| s1 | m | Design distance from the source to the multilayer. | 0 | |
| s2 | m | Design focusing distance of the multilayer. | 0 | |
| length | m | alternate name for zdepth (obsolete) | 0.5 | |
| width | m | alternate name for xwidth (obsolete) | 0.2 | |
| R0 | 1 | Maximal reflectivity | 1 | |
| Emin | keV | Lower limit of energy interval in datafile. Overrides what's written in the datafile header. | -1 | |
| Emax | keV | Upper limit of energy interval in datafile. Overrides what's written in the datafile header. | -1 | |
| Estep | keV | Step between energy sample points in datafile. Overrides what's written in the datafile header. | -1 | |
| Gamma | High electron density fraction of bilayer (in kinematical appr.). | 0 | ||
| Lambda | m | Thickness of bilayer (in kinematical appr.). | 0 | |
| rho_AB | Number electron density constrast in bilayer (in kinematical appr.). | 0 | ||
| N | 1 | Number of bilayers (in kinematical appr.). | 0 | |
| xwidth | m | Width of the mirror along X-axis. | 0 | |
| zdepth | m | Length of the mirror along Z. | 0 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Links
- Source code for
Multilayer_elliptic.comp.
[ Identification | Description | Input parameters | Links ]
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