20160927 mipo-experimental¶

Successes¶

• More-or-less stable running of magnets
• Magnet sign off - we should do this again
• Magnet on-call - we should keep up the good work here
• We got data!

Data taken¶

Only field-on data is listed. We have not got much useful field-off data due to issues listed below - Sunday and Monday were wiped out by DAQ and controls issues, until ISIS went down at 17:00 on Monday (just as things were sort of working).

140 MeV/c¶

Run #	Time	Number TOF1 triggers	Number TOF2 triggers
8265	255 minutes	88k	53k
8276	80 minutes		22k
8282	30 minutes		6k

170 MeV/c¶

Run #	Time	Number TOF1 triggers	Number TOF2 triggers
8277	105 minutes		23k
8280	210 minutes	145k	70k

200 MeV/c¶

Run #	Time	Number TOF1 triggers	Number TOF2 triggers
8281	240 minutes	212k	70k

Issues that affected data taking¶

Some may be fixed

1. Water flow is blocking now
2. Diffuser may become blocking next week
3. Run control instability
4. Tracker DAQ instability
5. DAQ central instability (is this triggered by tracker DAQ?)
6. Alarm handler issues
7. General controls issues
   • Trim coil current instability
   • Beam stop registered closed when not
   • Temperature readout on BL water reading incorrect value
8. TOF dead channels
9. Quadrature error in target - possibly user error

Alarms Sounding¶

1. Diffuser: known broken equipment
2. Heartbeat: false alarm
3. CDB communications
4. tracker cryo PSU voltage: known broken equipment
5. tracker AFE temp: known broken equipment
6. proton absorber
7. FC insulating vacuum
8. T2 current: false alarm
9. M2 current: false alarm
10. FC lHe level: known issue, chronically flaky equipment
11. FC load cell