How to ramp up HRS magnets

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

(Special instruction for the left Q3 - see below)

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.

• Instruction for the left Q3 during E12-17-003 (hypernuclear)

To ramp the Left-Q3 up, the recommended (temporary) procedure is:
- Turn off the regulator
- Run the Q3 power supply to 1600A. Let it stay there for about five minutes
- Slowly bring the current down to ~900A by small steps (e.g, 100A at a time). Keep the regulator off
- Once it reaches to 900A, turn the regulator on

• If one can not reset the Q3 remotely:

Do NOT go into the hall to reset by yourself. Contact magnet expert/tech on-call.