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14.28 The Fermi_chop2a McStas Component
SNS Fermi Chopper as used in SNS_ARCS
Identification
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Author: Garrett Granroth
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Origin: SNS Oak Ridge,TN
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Date: 6 Feb 2005
Description
Models an SNS Fermi Chopper, used in the SNS_ARCS instrument model.
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
|||
|
len |
m |
slit package length |
|
|
w |
m |
slit package width |
|
|
nu |
Hz |
frequency |
|
|
delta |
sec |
time from edge of chopper to center Phase angle |
|
|
tc |
sec |
time when desired neutron is at the center of the chopper |
|
|
ymin |
m |
Lower y bound |
|
|
ymax |
m |
Upper y bound |
|
|
nchan |
1 |
number of channels in chopper |
|
|
bw |
m |
blade width |
|
|
blader |
m |
blade radius |
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Links
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Component source code found in file Fermi_chop2a.comp.
