T9/PS run Daily Briefings - 3PM
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Daily briefing minutes
August 20 - 32-1-A24
Communications |
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Online&DAQ Report | -Interruption today between 10:30 and 12:00 because of an local power outage (Benoit accidentally pushed the emergency bottom in on of the barracks while trying to pull an ethernet cable). We couldn't switch the power back on by ourselves, after proper authorization of the control room. The expert on call had to drive over. Everything went back up without too much problem. Otherwise smooth operation. |
OfflineReport | The pipeline at SLAC has been stuck for more than 12 hours because u23 is full. We are eagerly waiting for California to wake up. |
Program | We took advantage of the interruption to prepare for the positron run. The annihilator is now a piece of 27-mm thick plexiglas. The two finger detectors are now side by side. We will start running positrons around 4 PM tonight and keep running overnight. |
Notes |
August 19 - 32-1-A24
Communications | - large increase in the beam rate for standard setting last night when running photons, had to reduce rate by closing slits to 51 to get usual rate on S0 (20K/cycle) and reduce pile-up; please monitor this number when taking photons and act on slits if needed |
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OfflineReport | - Benoit on CAL pedestal drift: analysed rate effect in CAL crystal on pedestal for p runs; there is a clear effect that shows a broadening of the landau peak in CalEneSum at high rate; cutting on GemDeltaEvtTime and selecting particles at the beginning of the spill the Landau appear normal. The same is confirmed when analyzing few runs taken with lower p rate. Positron and electron runs seem unaffected. Michael looking at tkr data to seek for any rate effect; the idea is to monitor the efficiency of a FE vs GemDeltaEvtTIme, as no runs with different rates are available for p through the tkr. |
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Communications | - Magnet failure: MNP17 colling system failure at 1AM stopped data taking for several hours but no damage on hardware. Physics restarted after 2 hours w/o silicon tagger for CAL calibrations. Magnet repaired in the morning | |
Online Report | - DAQ sync studies going on | |
Offline Report | Francesco: | |
Program | - Complete DAQ sync studies | |
Notes | - Fill elogbook | ]]></ac:plain-text-body></ac:structured-macro> |