Friday Nov 04, 2016: DAY Shift
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Shift Duties
- Take Production data
- Log all issues, alarms and questions.
- Perform shift checklist.
- Log target status twice per shift.
Production Running
Take 1 hour runs for both Left HRS DAQ and Right HRS DAQ. Follow Kinematic settings for DVCS Kin_60_1 and GMp 4th Pass "Parasitic" Kinematics, summarized below:
| Beam current | 10 μA |
| Beam Energy | 8.5 GeV |
| Target | LH2 (Loop 2) |
| Raster | ON (2x2mm2) [MCC units h=2, w=3] |
| VDC HV (both arms) | ON |
| DVCS Calo HV | ON |
DVCS Kin_60_1
| DVCS Calo Angle | 15.89° |
| DVCS Calo Distance | 1.5 m |
| LHRS Polarity | Negative |
| LHRS Momentum | 3.594 GeV/c |
| LHRS Angle | 24.564° |
| LHRS Q1 Current | 749.67 Amps (regulator OFF) |
| LHRS DAQ Config | DVCS |
| prescaleL | PS9=1 (all others zero) |
GMp 4th Pass "Parasitic" Kinematics
| RHRS Polarity | Negative |
| RHRS Momentum | 1.804 GeV/c |
| RHRS Angle | 53.475° |
| RHRS DAQ Config | RHRSadaq2 |
| prescaleR | PS1=PS2=PS3=1, && PS8=100 (all others zero) |
Compton runs
DVCS Trigger efficiency runs: instructions from Carlos
| 1) With the same CODA, target and beam configurations as production, bring the DVCS prescales GUI from adaq1 by typing: |
| prescale_DVCS |
| 2) Set the prescales as follows: |
| - 103kHz Clock: "Disabled" |
| - S0 & S2M: "1" |
| - S0 & CER: "Disabled" |
| - S2M & CER: "1" |
| Click the "Save" button to load the new settings. There is no need to restart or download the CODA configuration for these changes to be taken into account. |
| 3) Take a 15 min run. |
| 4) Set the prescales as follows: |
| - 103kHz Clock: "Disabled" |
| - S0 & S2M: "Disabled" |
| - S0 & CER: "1" |
| - S2M & CER: "Disabled" |
| Click the "Save" button to load the new settings. There is no need to restart or download the CODA configuration for these changes to be taken into account. |
| 5) Take a 15 min run |
| 6) Restore the production prescales: |
| - 103kHz Clock: "16384" |
| - S0 & S2M: "Disabled" |
| - S0 & CER: "Disabled" |
| - S2M & CER: "1" |
| Click the "Save" button to load the new settings. There is no need to restart or download the CODA configuration for these changes to be taken into account. |
| Exit the DVCS prescale GUI by cliking the "Exit" button |
| 7) Resume production... |
