Normalization runs
Two low intensity calibration runs should be taken once a week. One with the 10^-4 and one with the 10^-2 PS converters.
- In preparation for a normalization run, notify MCC that you are going to do a normalization
run. They have their own procedures for our normalization runs.
- Normalization runs are done with 50 pA current.
- The collimator is the same as the production running (i.e. 2.8 mm).
- Put the 10^-4 PS converter in (if it is not in already).
- As MCC to turn the orbit locks off, then bring the beam current down to 50 pA.
- The gamma profile should always be in the beam line. For the low intensity beam, it is the only reliable beam position mointor.
- Keep an eye on it during normalization run. If the position changes, stop the run, ask MCC to
retune the beam back and repeat the normalization run. (i.e. turn orbit locks on and bring current up to 5 nA, at the nominal BPM settings:
- 2c21a X = -0.09 +/- 0.1 mm
- 2c21a Y = -0.40 +/- 0.1 mm
- 2c24a X = 0.03 +/- 0.1 mm
- 2c24a Y = -0.61 +/- 0.1 mm
Ask MCC to turn the beam off.
Put radiator C (10^-5) in.
Ask MCC to turn the orbit locks off, then bring the beam current down to 50 pA. Check the
beam position on the gamma profiler, make sure it stays the same during the normalization run.
Put TAC in (note: TAC threshold is set at 75 KHz).
- Start taking data. ~200K-300K evnets is enough.
- Coda configuration file: G_PROD
- Trigger configuration file: g6_normalization.cfg (MOR with no prescaling)
Change the PS converter to 10^-2, take another run with ~200K-300K events
Move TAC out of the beam line.
Ask MCC to turn the beam off.
Move the gamma profiler into the beamline.
Put radiator A (3x10^-4) in.
Put the 10^-4 PS converter in.
Turn the drift chamber HVs on.
Ask MCC to turn the orbit locks on and bring the current up to the production running setting.
Setting the Start Counter -750 booster Hvs
- From clon10, type tsconnect /dev/cua/51
- Select display "D"
- The channels are: stcntr01-06
- To quit, hit ENTER, then ~, then q.
Date: 2001/09/5 03:00
Who: Mina Nozar