Run Summary Run Meeting 09 08 12 Daily

Run Summary Run Meeting 09 -08 -12

Daily Summary LHC: - Physics fills Fill 2928 dumped on a failure of a controller of a quadrupole right of Point 1 Fill 2929 dumped by software interlock Fill 2932 ongoing… LHCb: - OT threshold scan in Fill 2928, run 124940, 124941 up until step 90. Went relatively well, had to resume it at step 90 in Fill 2929, run 124975 - couldn’t run more than 6 k. Hz output, because I intentionally didn’t set up the right number of writers - VELO stopped moving after the first step as DAQ was not running and we cancelled the request to open: had to open and reclose. - Then reconfigured the system for physics and took data for the rest of Fill 2929 and 2932 Few issues noticed: - ODE Bxid error (L 0 MUON-MUON sync error) seen four times - Vetellc 32 throttles quite often at start of physics data taking - Lumi went up to 4. 6*10^32 due to orbit correction Let’s cross the 1/fb recorded luminosity, missing less than 5/pb!! Run Meeting, 09/08/12 Federico Alessio 2

LHC progress ü 01: 25 Stable Beams fill 2927, 1374 bunches with vertical instability end of squeeze. Operator dump at 9: 30 as 100/pb were collected in ATLAS/CMS. ü 12: 10 Stable Beams fill 2928, still vertical instability end of squeeze. Beams dumped by QPS trigger on RQSX 3. R 1. Probably SEU. ü 20: 03 Stable Beams Fill 2929. Beams dumped at 1: 48 as RB energy check went false, SMP energy glitch possibly. During this fill, chromaticity and octupole currents were changed trying to get the beams stable in squeeze. But still vertical instabilities at squeeze at 1. 5 m beta star. It seems that the luminosity between ATLAS and CMS is not equal anymore within 1%, to be looked at. ü 05: 35 Stable beams Fill 2932. Still some trimming of the tune, chromaticity and octupole currents. But still instabilities, this time in the horizontal plane. Investigation continues. Run Meeting, 09/08/12 Federico Alessio 3

LHC progress Misc: ü The TDI right jaw didn't move correctly again, possibly an access will be needed to fix a motor driver and more alarm have been associated to it. No risk for LHCb, but risk to dump the beam as collimation efficiency worsened if TDI not in best position. ü TOTEM will move in half way through the fill in one of the next fills. ü LHCb polarity change doesn't seem to be done any time soon as the LHC is still playing with stabilities. To be discussed. ü SPS intervention today starting at 10 am for 2 -3 hours. And an urgent access of 2 hours minimum will be done today to fix a Xenon leak in ATLAS and other LHC accesses in parallel. Run Meeting, 09/08/12 Federico Alessio 4

LHCb run summaries Fill 2928 started on 08/08 at 12: 10, ended at 14: 45 Number of bunches per beam = 1374 Number of colliding per beam = 1262 Integrated Delivered Lumi (1/pb) = 0. 22 Integrated Recorded Lumi (1/pb) = 0. 18 Peak Inst Lumi (10^30/cm^2/s) = 32. 11 Average Inst Lumi (10^30/cm^2/s) = 26. 21 Average Mu = 0. 11 Average Pileup = 1. 06 Average L 0 Physics Rate (k. Hz) = 39. 47 Average L 0 Raw Physics Rate (k. Hz) = 45. 20 Average HLT Physics Rate (k. Hz) = 0. 00 Percentage of HLT Deferral (percent) = 0. 00 Efficiency Per Fill (percent) = 82. 35 Annual Cumulative Efficiency (percent) = 94. 57 Performed OT scan up to step 90, run 124940 and 124941 sent to CASTOR Run Meeting, 09/08/12 Federico Alessio 5

LHCb run summaries Fill 2929 started on 08/08 at 20: 03, ended at 01: 52 Number of bunches per beam = 1374 Number of colliding per beam = 1262 Integrated Delivered Lumi (1/pb) = 7. 17 Integrated Recorded Lumi (1/pb) = 6. 97 Peak Inst Lumi (10^30/cm^2/s) = 419. 62 Average Inst Lumi (10^30/cm^2/s) = 364. 78 Average Mu = 1. 66 Average Pileup = 2. 05 Average L 0 Physics Rate (k. Hz) = 889. 47 Average L 0 Raw Physics Rate (k. Hz) = 912. 52 Average HLT Physics Rate (k. Hz) = 3. 73 Percentage of HLT Deferral (percent) = 20. 00 Efficiency Per Fill (percent) = 97. 28 Annual Cumulative Efficiency (percent) = 94. 59 Concluded OT scan, run 124975 sent to CASTOR then resumed physics Run Meeting, 09/08/12 Federico Alessio 6

LHCb run summaries Run Meeting, 09/08/12 Federico Alessio 7

Main problems - VETELLC 32 often out of synch at beginning of FIll Needed recurrent resets to be fixed - VELO no error banks recipe is the reason for a long first step in scans Expert informed and will be fixed - VELO stopped the procedure to move due to the long first step (no DAQ running) and the fact that we cancelled the request to open Had to reopen the VELO and close it again - Warnings on VELO cooling, compressor suction temperature is high (-2. 9 , -3. 1) To be looked at - Data Manager spotted a L 0 MUON-MUON link synch problem during interfill gap Then followed by four alarms about L 0 MU-MUON synch problems during the night, Bxid synch as well To be looked at and mask if necessary Run Meeting, 09/08/12 Federico Alessio 8

Main problems - Low occupancy region in M 4 Contacted piquet, related to change of thresholds - Deferred HLT started in the wrong mode (Forking instead of Checkpointing) due to precedent OT scan (which uses Forking) Clara spotted it online and solve it - Low output HLT rate during scan, resulting in low L 0 rate Because I didn’t set up the right writers Can we have these settings (writers) save as a recipe in OT scan, CCE scan and Vd. M scan? In two years from now we’ll forget… - Lumi went up to 4. 6*10^32 in the night Usual orbit correction from LHC, kindly put back to 4*10^32 Run Meeting, 09/08/12 Federico Alessio 9

Problem DB L 0 MUON-MUON link synch error https: //lblogbook. cern. ch/Shift/60698 Low occupancy region in M 4 https: //lblogbook. cern. ch/Shift/60707 Run Meeting, 09/08/12 Federico Alessio 10