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14.17 The MM_p McXtrace Component
Date: Feb. 2017 Version: 1.1 Release: McXtrace 1.2 Origin: DTU Physics, DTU Space
Single Pore as part of the Silicon Pore Optics (SPO) as envisioned for the ATHENA+ space telescope.
Identification
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Author: Erik B Knudsen and Desiree D. M. Ferreira
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Origin: DTU Physics, DTU Space
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Date: Feb. 2016
Description
A single pore is simulated, which may have thick walls. The top and bottom are curved cylindrically azimuthally, and according to the Wolter I optic lengthwise (sagitally). A parameter specifies whether this is hyperbolic or parabolic. The azimuthal curvature is defined by the parameter radius. This refers to the center of the pore. I.e the top and bottom plates have radius of curvature <radius+pore_height/2> and <radius-pore_height/2> 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.
Example: MM_p( pore_th=0, ring_nr=1, Z0=12, pore_width=0.83e-3 , pore_height=0.605e-3, mirror_reflec=”mirror_coating_unity.txt”, R_d=0, size_file=”ref_design_breaks.txt”)
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
|||
|
pore_th |
m |
Thickness of the pore walls (plates) |
|
|
ring_nr |
1 |
Ring number; selects the data block read from size_file |
|
|
Z0 |
m |
Distance between optics centre plane and focal spot (essentially focal length). |
|
|
pore_height |
m |
Height of the pore. |
|
|
pore_width |
m |
Width of a single pore |
|
|
chamfer_width |
m |
Width of side walls. |
0 |
|
gap |
m |
Gap between the plate and the intersection plane with the hyperbolic section. |
0 |
|
zdepth |
m |
Currently not used by the component |
0 |
|
mirror_reflec |
|
Data file containing reflectivities of the reflector surface (TOP). |
”” |
|
bottom_reflec |
|
Data file containing reflectivities of the bottom surface (BOTTOM). |
”” |
|
side_reflec |
|
Data file containing reflectivities of the side walls (LEFT and RIGHT). |
”” |
|
size_file |
str |
Table file with the per-ring geometry, read with block number ring_nr |
”” |
|
non_specular_file |
str |
Data file describing non-specular reflectivity |
”” |
|
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 |
|
waviness |
rad |
Waviness of the reflecting surface. The slope error is assumed to be uniformly distributed in the interval [-waviness:waviness]. |
0 |
|
longw |
1 |
If non-zero, waviness is 1D and along the pore axis. |
0 |
|
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Links
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Component source code found in file MM_p.comp.
