Difference between revisions of "Run Coordinator report: Spring 2018 r17"
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The RC period started with the hall in restricted access for a tour on Wednesday. Afterwards, a network failure in the MCC caused by a configuration change of a router resulted in a long down time. The recovery period included a pass change to Hall A and took until Thursday 9pm. We started the program with harp scans and two runs in raw mode and continued production data taking from midnight to 9am on Friday. The rest of the day was dedicated to a fast-raster scan (~1h) and two long TAC runs, one with a full and the other one with an empty hydrogen target. In between, PS/SC rate studies were performed with different target densities. On Saturday, we continued production data taking and the trigger counter for this beam time eventually exceeded 150B events. Another fast-raster test was denied by the crew chief, as it was considered too risky with Michael McCaughan on vacation and Richard Jones off-site. On Saturday evening, we started trigger studies which continued until 3am on Sunday. Besides trigger efficiency runs with the start-counter trigger, we also managed to included the TOF in the trigger, which was proposed for the pion polarizability program. | The RC period started with the hall in restricted access for a tour on Wednesday. Afterwards, a network failure in the MCC caused by a configuration change of a router resulted in a long down time. The recovery period included a pass change to Hall A and took until Thursday 9pm. We started the program with harp scans and two runs in raw mode and continued production data taking from midnight to 9am on Friday. The rest of the day was dedicated to a fast-raster scan (~1h) and two long TAC runs, one with a full and the other one with an empty hydrogen target. In between, PS/SC rate studies were performed with different target densities. On Saturday, we continued production data taking and the trigger counter for this beam time eventually exceeded 150B events. Another fast-raster test was denied by the crew chief, as it was considered too risky with Michael McCaughan on vacation and Richard Jones off-site. On Saturday evening, we started trigger studies which continued until 3am on Sunday. Besides trigger efficiency runs with the start-counter trigger, we also managed to included the TOF in the trigger, which was proposed for the pion polarizability program. | ||
| − | On Sunday at 5am, the runs was officially concluded. The solenoid, the PS and the sweeping magnet were ramped down. The target was switched off, the goniometer retracted and the collimator left in blocking position. All high and low voltages were turned off, except for the FCAL which was left on to study the failure rate of the HV bases for a few weeks after the run. The | + | On Sunday at 5am, the runs was officially concluded. The solenoid, the PS and the sweeping magnet were ramped down. The target was switched off, the goniometer retracted and the collimator left in blocking position. All high and low voltages were turned off, except for the FCAL which was left on to study the failure rate of the HV bases for a few weeks after the run. The area was cleared for restricted access at 10am on Sunday, May 6. |
Latest revision as of 14:17, 8 May 2018
Run Coordinator report for May 2-6, 2018
We were scheduled for 88 hours of CW beam, of which 46.2 hours (53%) were delivered to Hall D. Of this, we used 43.1 hours (ABU) or 49% of the scheduled beam time. The causes of down time were DAQ problems after the long break on Wednesday/Thursday (~1h), an access to the hall to swap an SSP module for trigger tests (~1h) and the usual configuration changes between diamond orientations (~1h).
After completing 100% of the scheduled experiment hours (2003h) for this run, we collected 111% of the expected data (1108.9h). This expectation assumes a total efficiency of 50%, which turned out to be higher in the end.
The RC period started with the hall in restricted access for a tour on Wednesday. Afterwards, a network failure in the MCC caused by a configuration change of a router resulted in a long down time. The recovery period included a pass change to Hall A and took until Thursday 9pm. We started the program with harp scans and two runs in raw mode and continued production data taking from midnight to 9am on Friday. The rest of the day was dedicated to a fast-raster scan (~1h) and two long TAC runs, one with a full and the other one with an empty hydrogen target. In between, PS/SC rate studies were performed with different target densities. On Saturday, we continued production data taking and the trigger counter for this beam time eventually exceeded 150B events. Another fast-raster test was denied by the crew chief, as it was considered too risky with Michael McCaughan on vacation and Richard Jones off-site. On Saturday evening, we started trigger studies which continued until 3am on Sunday. Besides trigger efficiency runs with the start-counter trigger, we also managed to included the TOF in the trigger, which was proposed for the pion polarizability program.
On Sunday at 5am, the runs was officially concluded. The solenoid, the PS and the sweeping magnet were ramped down. The target was switched off, the goniometer retracted and the collimator left in blocking position. All high and low voltages were turned off, except for the FCAL which was left on to study the failure rate of the HV bases for a few weeks after the run. The area was cleared for restricted access at 10am on Sunday, May 6.
