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7.14 The Pol_constBfield McStas Component
Constant magnetic field.
Identification
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Author: Peter Christiansen
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Origin: RISOE
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Date: July 2006
Description
Rectangular box with constant B field along y-axis (up). The component can be rotated to make either a guide field or a spin flipper. A neutron hitting outside the box opening or the box sides is absorbed.
Example: Pol_constBfield(xwidth=0.1, yheight=0.1, zdepth=0.2, fliplambda=5.0)
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
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xwidth |
m |
Width of opening |
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yheight |
m |
Height of opening |
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zdepth |
m |
Length of field |
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B |
Gauss |
Magnetic field along y-direction |
0 |
|
fliplambda |
Å |
lambda for calculating B field |
0 |
|
flipangle |
deg |
Angle flipped for lambda = fliplambda fliplambda and flipangle overrides B so a neutron with s= (1, 0, 0) and v = (0, 0, v(fliplambda)) will have s =(cos(flipangle), sin(flipangle), 0) after the section. |
180 |
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Links
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Component source code found in file Pol_constBfield.comp.
