The `TwinKB_ML` Component

Montel optic model (aka side-by-side Kirkpatrick Baez)

Identification

Site:
Author: Jana Baltser, Peter Willendrup, Anette Vickery, Andrea Prodi, Erik Knudsen, Jesper Buch Jensen
Origin: NBI
Date: May 2012

Description

Models a Montel optic, or Twin Kirkpatrick Baez mirror optic (hence the component name).
The mirror are fully abutting, i.e. there's is no gap between them, and perfectly elliptic.

Reads reflectivity values from a data input file for a W/B4C multilayer.
The multilayer code reflects ray in an ideal geometry, the reflectivity datafile accounts for surface roughness, sigma.

The mirror is positioned such that the long axis of the mirror elliptical surface coincides with the 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: TwinKB_ML( theta=1.2, s1=.045 , s2=.9 , length=0.06 , width=0.2 , R0=0 , reflectivity_datafile="Ref_W_B4C.txt")

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
reflectivity_datafile	str	File which contains reflectivities as a function of q.	"Ref.txt"
theta	deg	Incident angle	1.2
s1	m	Distance from the source to the multilayer
s2	m	Focusing distance of the multilayer
length	m	Length of the mirrors	0.6
width	m	Width of the mirror along x-axis	0.2
R0	0-1	Constant reflectivity, R0=1 for an ideal situation. If R0=0, the code reads the reflectivity from the datafile	0

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

McXtrace - An X-ray ray-trace simulation package

The TwinKB_ML Component

Identification

Description

Input parameters

Links

The `TwinKB_ML` Component