Difference between revisions of "How to ramp up HRS magnets"

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Use a procedure similar to the Q2 and Q3 to cycle the Q1s when starting from off condition:
 
Use a procedure similar to the Q2 and Q3 to cycle the Q1s when starting from off condition:
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*During the E12-11-112 experiment, the LHRS Q1 regulator will be always off, please look at the runplan or ask the experts for the Q1 current to use for each kinematics.
 
  
 
  1. Turn off the regulator for Q1, Q2 and Q3. Leave the dipole regulator on
 
  1. Turn off the regulator for Q1, Q2 and Q3. Leave the dipole regulator on
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  4. Run the Q1 power supply to 900 A.  Let it stay there for about five minutes
 
  4. Run the Q1 power supply to 900 A.  Let it stay there for about five minutes
  
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  5. Turn the regulator for the left/right Q1 on ( '''For LQ1, manually enter the desired current, and leave the regulator off''')- the magnet should settle at the current necessary to reach the desired momentum. The Hall probes should read positive for positive particles and negative for negative particles (WITH CURRENT IN THE MAGNETS)
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  5. Turn the regulator for the left/right Q1 on - the magnet should settle at the current necessary to reach the desired momentum. The Hall probes should read positive for positive particles and negative for negative particles (WITH CURRENT IN THE MAGNETS)
  
 
  6. Procedure for Q2 and Q3 is similar but with different values to cycle the magnets: 1600A for LQ2, LQ3, and 1400 A for RQ2, RQ3.
 
  6. Procedure for Q2 and Q3 is similar but with different values to cycle the magnets: 1600A for LQ2, LQ3, and 1400 A for RQ2, RQ3.

Revision as of 18:44, 31 October 2018

Use a procedure similar to the Q2 and Q3 to cycle the Q1s when starting from off condition: 

1. Turn off the regulator for Q1, Q2 and Q3. Leave the dipole regulator on

2. Set the momentum of the spectrometer you want. The dipole should start moving towards that setting. The NMR will be set too. Q1, Q2 and Q3 will not change.

3. Turn on the Q1 power supply if not on already (The polarity of the right Q1 needs to be set with the supply off)

4. Run the Q1 power supply to 900 A.  Let it stay there for about five minutes

5. Turn the regulator for the left/right Q1 on - the magnet should settle at the current necessary to reach the desired momentum. The Hall probes should read positive for positive particles and negative for negative particles (WITH CURRENT IN THE MAGNETS)

6. Procedure for Q2 and Q3 is similar but with different values to cycle the magnets: 1600A for LQ2, LQ3, and 1400 A for RQ2, RQ3.
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