Difference between revisions of "Corrector Magnets"

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[https://hallaweb.jlab.org/wiki/index.php/Shift_How-To Back to SBS How-To]
 
[https://hallaweb.jlab.org/wiki/index.php/Shift_How-To Back to SBS How-To]
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= Description =
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The corrector magnets are two pairs of coils positioned along the beam line near the SBS magnet in order to minimize the deflection of the electron beam en route to the high-power beam dump.  They are controlled by Accelerator Division.  One pair is called ''upstream'', while the other is called ''downstream'', referring to their location relative to the target pivot; ''upstream'' is closest to the target pivot, while ''downstream'' is furthest from the target pivot.
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[[File:Sbs-correctors gmn.png|800px]]
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= Settings =
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The nominal settings for the corrector magnets are given in the table below. <span style="color:blue">''Note that the current settings are different based on the Q2 bin''</span>
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{| class="wikitable"
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! Corrector Pair
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! Q2 = 3.5 GeV^2 Current (A)
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! Q2 = 4.5 GeV^2 Current (A)
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! Q2 = 5.7 GeV^2 Current (A)
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! Q2 = 8.1 GeV^2 Current (A)
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! Q2 = 10.2 GeV^2 Current (A)
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! Q2 = 12.0 GeV^2 Current (A)
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! Q2 = 13.5 GeV^2 Current (A)
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|-
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! Upstream
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| X
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| X
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| X
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| X
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| X
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| X
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| X
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|-
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! Downstream
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| X
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| X
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| X
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| X
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| X
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| X
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| X
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|}
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= Monitoring =
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To monitor the corrector magnet currents, run the following in a terminal to bring up a GUI that will show the magnet currents as a function of time:
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<code> ssh to-some-location </code>
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<code> ./some-bash-script </code>

Latest revision as of 10:56, 14 June 2021

Back to SBS How-To

Description

The corrector magnets are two pairs of coils positioned along the beam line near the SBS magnet in order to minimize the deflection of the electron beam en route to the high-power beam dump. They are controlled by Accelerator Division. One pair is called upstream, while the other is called downstream, referring to their location relative to the target pivot; upstream is closest to the target pivot, while downstream is furthest from the target pivot.

Sbs-correctors gmn.png

Settings

The nominal settings for the corrector magnets are given in the table below. Note that the current settings are different based on the Q2 bin

Corrector Pair Q2 = 3.5 GeV^2 Current (A) Q2 = 4.5 GeV^2 Current (A) Q2 = 5.7 GeV^2 Current (A) Q2 = 8.1 GeV^2 Current (A) Q2 = 10.2 GeV^2 Current (A) Q2 = 12.0 GeV^2 Current (A) Q2 = 13.5 GeV^2 Current (A)
Upstream X X X X X X X
Downstream X X X X X X X

Monitoring

To monitor the corrector magnet currents, run the following in a terminal to bring up a GUI that will show the magnet currents as a function of time:

ssh to-some-location ./some-bash-script

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