Difference between revisions of "Run Coordinator report: summer 2022 w4"
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However, a passing thunderstorm on Sunday afternoon caused a glitch in the cooling water supply for the solenoid power supply and caused the magnet to ramp down. We changed the program and switched to straight track running with no solenoid field 50M triggers in total till 4am the following morning July 4th at which point ramping up the solenoid field started and full field was reach close to noon. From this point on regular production data taking was resumed on the Pb target. | However, a passing thunderstorm on Sunday afternoon caused a glitch in the cooling water supply for the solenoid power supply and caused the magnet to ramp down. We changed the program and switched to straight track running with no solenoid field 50M triggers in total till 4am the following morning July 4th at which point ramping up the solenoid field started and full field was reach close to noon. From this point on regular production data taking was resumed on the Pb target. | ||
| − | Tuesday morning MCC took the decision to declare Wednesday July 6th a "maintenance" day during which the power supplies for the Wien-filter vertical will be replace as it is suspected to be the source of 60Hz intensity modulation in the beam which is currently seen as the main cause for limited current delivery to HallC. In the early afternoon the DAQ stopped working due to some fADC125 modules being responsible for. The roctrig1 create required rebooting followed by reboots of many other systems before the DAQ was operational again. Continued taking data till Wednesday morning when maintenance day started. | + | Tuesday morning MCC took the decision to declare Wednesday July 6th a "maintenance" day during which the power supplies for the Wien-filter vertical will be replace as it is suspected to be the source of 60Hz intensity modulation in the beam which is currently seen as the main cause for limited current delivery to HallC. In the early afternoon the DAQ stopped working due to some fADC125 modules being responsible for. The roctrig1 create required rebooting followed by reboots of many other systems before the DAQ was operational again. Continued taking data till Wednesday morning when maintenance day started. During maintenance day the following task were taken on |
| + | * replace 3 FCAL bases | ||
| + | * Reestablish the RF signal in the TOF CAEN TDC | ||
| + | * ramp down solenoid to 800A to facilitate the switch of operations of one of the two running cyro compressor to the spare one. | ||
| + | * investigate the communication problems with the Tagger magnet NMR probe. | ||
Latest revision as of 13:12, 6 July 2022
The week prior to the 4th of July week end MCC devoted most of the day shift to try to establish high current (70uA) beam to HallC which pretty much failed. The maximum sustainable beam current to HallC was around 45 to 50 uA. Beam was taken away in the mornings not to return before later in the evening at times late at night. Every time the beam was restored to HallD harp scans where performed as the beam characteristics may have changed. Over the holiday week end the plan was to run production data taking on the Pb target.
However, a passing thunderstorm on Sunday afternoon caused a glitch in the cooling water supply for the solenoid power supply and caused the magnet to ramp down. We changed the program and switched to straight track running with no solenoid field 50M triggers in total till 4am the following morning July 4th at which point ramping up the solenoid field started and full field was reach close to noon. From this point on regular production data taking was resumed on the Pb target.
Tuesday morning MCC took the decision to declare Wednesday July 6th a "maintenance" day during which the power supplies for the Wien-filter vertical will be replace as it is suspected to be the source of 60Hz intensity modulation in the beam which is currently seen as the main cause for limited current delivery to HallC. In the early afternoon the DAQ stopped working due to some fADC125 modules being responsible for. The roctrig1 create required rebooting followed by reboots of many other systems before the DAQ was operational again. Continued taking data till Wednesday morning when maintenance day started. During maintenance day the following task were taken on
- replace 3 FCAL bases
- Reestablish the RF signal in the TOF CAEN TDC
- ramp down solenoid to 800A to facilitate the switch of operations of one of the two running cyro compressor to the spare one.
- investigate the communication problems with the Tagger magnet NMR probe.
