The `Guide_four_side` Component

Guide with four side walls

Identification

Site:
Author: Tobias Panzner
Origin: PSI
Date: 07/08/2010

Description

This component models a guide with four side walls.
As user you can controll the properties of every wall separatly. All togther you have up to
8 walls: 4 inner walls and 4 outer walls.

Every single wall can have a elliptic, parabolic or straight shape.
All four sides of the guide are independent from each other.
In the elliptic case the side wall shape follows the equation x^2/b^2+(z+z0)^2/a^2=1
(the center of the ellipse is located at (0,-z0)).
In the parabolic case the side wall shape follows the equation z=b-ax^2;mc
In the straight case the side wall shape follows the equation z=l/(w2-w1)*x-w1.

The shape selection is done by the focal points. The focal points are located at the
z-axis and are defined by their distance to the entrance or exit window of the guide
(in the following called 'focal length').

If both focal lengths for one wall are zero it will be a straight wall (entrance and
exit width have to be given in the beginning).

If one of the focal lengths is not zero the shape will be parabolic (only the entrance width
given in the beginning is recognized; exit width will be calculated). If the the entrance
focal length is zero the guide will be a focusing devise.
If the exit focal length is zero it will be defocusing devise.

If both focals are non zero the shape of the wall will be elliptic (only the entrance width
given in the beginning is recognized; exit width will be calculated).

Notice: 1.)The focal points are in general located outside the guide (positive focal lengths).
Focal points inside the guide need to have negative focal lengths.
2.)The exit width parameters (w2r, w2l, h2u,h2d) are only taken into account if the
walls have a linear shape. In the ellitic or parabolic case they will be ignored.

For the inner channel: the outer side of each wall is calculated by the component in depentence
of the wallthickness and the shape of the inner side.

Each of walls can have a own indepenting reflecting layer (defined by an input file)
or it can be a absorber or it can be transparent.

The reflectivity properties can be given by an input file (Format [q(Angs-1) R(0-1)]) or by
parameters (Qc, alpha, m, W).

%BUGS
This component does not work with gravitation on.

This component does not work correctly in GROUP-modus.

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
RIreflect	str	Name of relfectivity file for the right inner wall.	0
LIreflect	str	Name of relfectivity file for the left inner wall.	0
UIreflect	str	Name of relfectivity file for the top inner wall.	0
DIreflect	str	Name of relfectivity file for the bottom inner wall.	0
ROreflect	str	Name of relfectivity file for the right outer wall.	0
LOreflect	str	Name of relfectivity file for the left outer wall.	0
UOreflect	str	Name of relfectivity file for the top outer wall.	0
DOreflect	str	Name of relfectivity file for the bottom outer wall.	0
w1l	m	Width at the left guide entry (positive x-axis)	0.002
w2l	m	Width at the left guide exit (positive x-axis)	0.002
linwl			0
loutwl			0
w1r	m	Width at the right guide entry (negative x-axis)	0.002
w2r	m	Width at the right guide exit (negative x-axis)	0.002
linwr			0.0
loutwr			0
h1u	m	Height at the top guide entry (positive y-axis)	0.002
h2u	m	Height at the top guide entry (positive y-axis)	0.002
linhu			0.0
louthu			0
h1d	m	Height at the bottom guide entry (negative y-axis)	0.002
h2d	m	Height at the bottom guide entry (negative y-axis)	0.002
linhd			0.0
louthd			0
l	m	length of guide (DEFAULT = 0)	0
R0	1	Low-angle reflectivity (DEFAULT = 0.99)	0.99
Qcxl	AA-1	Critical scattering vector for left vertical	0.0217
Qcxr	AA-1	Critical scattering vector for right vertical	0.0217
Qcyu	AA-1	Critical scattering vector for top inner wall	0.0217
Qcyd	AA-1	Critical scattering vector for bottom inner wall	0.0217
alphaxl	AA	Slope of reflectivity for left vertical	6.07
alphaxr	AA	Slope of reflectivity for right vertical	6.07
alphayu	AA	Slope of reflectivity for top inner wall	6.07
alphayd	AA	Slope of reflectivity for bottom inner wall	6.07
Wxr	AA-1	Width of supermirror cut-off for right inner wall	0.003
Wxl	AA-1	Width of supermirror cut-off for left inner wall	0.003
Wyu	AA-1	Width of supermirror cut-off for top inner wall	0.003
Wyd	AA-1	Width of supermirror cut-off for bottom inner wall	0.003
mxr	1	m-value of material for right vertical inner wall.	3.6
mxl	1	m-value of material for left vertical inner wall.	3.6
myu	1	m-value of material for top inner wall	3.6
myd	1	m-value of material for bottom inner wall	3.6
QcxrOW	AA-1	Critical scattering vector for right vertical	0.0217
QcxlOW	AA-1	Critical scattering vector for left vertical	0.0217
QcyuOW	AA-1	Critical scattering vector for top outer wall	0.0217
QcydOW	AA-1	Critical scattering vector for bottom outer wall	0.0217
alphaxlOW	AA	Slope of reflectivity for left vertical	6.07
alphaxrOW	AA	Slope of reflectivity for right vertical	6.07
alphayuOW	AA	Slope of reflectivity for top outer wall	6.07
alphaydOW	AA	Slope of reflectivity for bottom outer wall	6.07
WxrOW	AA-1	Width of supermirror cut-off for right outer wall	0.003
WxlOW	AA-1	Width of supermirror cut-off for left outer wall	0.003
WyuOW	AA-1	Width of supermirror cut-off for top outer wall	0.003
WydOW	AA-1	Width of supermirror cut-off for bottom outer wall	0.003
mxrOW	1	m-value of material for right vertical outer wall	0
mxlOW	1	m-value of material for left vertical outer wall	0
myuOW	1	m-value of material for top outer wall	0
mydOW	1	m-value of material for bottom outer wall	0
rwallthick	m	thickness of the right wall (DEFAULT = 0.001 m)	0.001
lwallthick	m	thickness of the left wall (DEFAULT = 0.001 m)	0.001
uwallthick	m	thickness of the top wall (DEFAULT = 0.001 m)	0.001
dwallthick	m	thickness of the bottom wall(DEFAULT = 0.001 m)	0.001

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

The Guide_four_side Component

Identification

Description

Input parameters

Links

The `Guide_four_side` Component