McXtrace - An X-ray ray-trace simulation package

[ Identification | Description | Input parameters | Links ]

The Shell_c Component

Single conical shell as part of a Wolter optic.

Identification

• Site:
• Author: Erik B Knudsen and Desiree D. M. Ferreira
• Origin: DTU Physics, DTU Space
• Date: Feb. 2016

Description

A single shell is simulated. The top and bottom are curved cylindrically
azimuthally, whereas they are straight sagitally. The primary parameter specifies whether this is a
primary or secondary mirror.
The azimuthal curvature is defined by the parameter radius. This refers to the top plate of the shell. I.e the top
and bottom plates have radius of curvature  and  respectively.

To intersect the Wolter I plates we take advatage of the azimuthal symmetry and only consider the radial component
of the photon's wavevector.

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
radius_m	m	Ring radius of the upper (reflecting) plate of the shell at the optic centre.
Z0	m	Distance between optics centre plane and focal spot (essentially focal length).
yheight	m	Height of the shell.
gap	m	Gap between the plate and the intersection plane with the hyperbolic section. (currently ignored)	0
chamferwidth	m	Width of side walls.	0
length			0
mirror_reflec		Data file containing reflectivities of the reflector surface (TOP).	""
bottom_reflec		Data file containing reflectivities of the bottom surface (BOTTOM).	""
R_d		Default reflectivity value to use if no reflectivity file is given. Useful f.i. is one surface is reflecting and the others absorbing.	1
primary		If non-zero, the shell is considered a primary reflector, and extends towards negative z. I.e. the entry plane is behind the z=0-plane. If zero, the shell is considered secondary	1
dalpha	deg	Offset to the alpha angle computed from the focal length. Useful for targeting the modified conical geometry (currently ignored).	0
waviness	rad	Waviness of the shell reflecting surface. The slope error is assumed to be uniformly distributed in the interval [-waviness:waviness].	0
longw		If non-zero, waviness is 1D and along the shell axis.	0

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

Links

• Source code for Shell_c.comp.

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[ Identification | Description | Input parameters | Links ]

Generated on 2023-12-19 19:37:45

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Last Modified: Tuesday, 13-Feb-2024 16:50:14 CET