Difference between revisions of "How-to"

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(How-To)
(Magnets)
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* Magnet screen is brought up on any hcdesk machine using
 
* Magnet screen is brought up on any hcdesk machine using
 
   % go_magnets
 
   % go_magnets
 +
 +
*For the Fall 2017 run, the SHMS magnets can be set by current from the desired momentum in [GeV]. From any computer, run:
 +
 +
% ./getSHMS P
 +
 +
where P is the desired momentum in [GeV]. The formulas and program should be kept in sync with the [https://github.com/hszumila/field17 repository]. For optimal stability, all magnets should be put "on loop". This is done by first setting the polarity, then setting the magnet to a maximum current, and then ramping down to the desired current. The maximum currents for putting a magnet on loop are shown below:
 +
 +
{|border="1" align="center"
 +
! SHMS Magnet !!  Max current [A]
 +
|-
 +
!HB !! 3600
 +
|-
 +
!Q1 !! 2400
 +
|-
 +
!Q2 !! 3660
 +
|-
 +
!Q3 !! 2480
 +
|-
 +
!Dipole !! 3450
 +
|}
 +
 +
 +
 +
 
*[[Spectrometer Magnets]]
 
*[[Spectrometer Magnets]]
 
*[https://hallcweb.jlab.org/DocDB/0008/000837/001/HMS_cycling_2007.pdf How to cycle the HMS quad magnets]
 
*[https://hallcweb.jlab.org/DocDB/0008/000837/001/HMS_cycling_2007.pdf How to cycle the HMS quad magnets]

Revision as of 11:34, 1 December 2017

NOTE: If you can't solve the problem in 1 hour you MUST then contact the Run Coordinator! (See also Experts on call)

How-to's

Magnets

  • Magnet screen is brought up on any hcdesk machine using
 % go_magnets
  • For the Fall 2017 run, the SHMS magnets can be set by current from the desired momentum in [GeV]. From any computer, run:

% ./getSHMS P

where P is the desired momentum in [GeV]. The formulas and program should be kept in sync with the repository. For optimal stability, all magnets should be put "on loop". This is done by first setting the polarity, then setting the magnet to a maximum current, and then ramping down to the desired current. The maximum currents for putting a magnet on loop are shown below:

SHMS Magnet Max current [A]
HB 3600
Q1 2400
Q2 3660
Q3 2480
Dipole 3450



SHMS Detectors

HMS Detectors

Hall C target

Hall C target configuration for Spring 17 running

Legacy Documentation