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Polaris Jaws
John Holt edited this page May 2, 2017
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Polaris jaws are a set of 5 jaws which work in concert to limit the beam of neutrons reaching the sample. Jaws 1-4 are instrument user controlled and work together in a pyrmid shape to reduce the beam size in stages. The gap in each jaw set is set based on its distance from the sample.
Jaw set 5 is under on instrument scientist control. To change these settings the user must put the GUI into management mode.
The control files for the polaris jaws are part of the gallil motor set up and are per instrument. There is an example in ...\EPICS\support\motorExtensions\master\settings\polaris_jaws\*.cmd which would need to be copied to C:\Instrument\Settings\config\<instrument host name>\configurations\galil