Weekend Summary Friday Saturday Sunday C. Gemme, INFN Genova, RM report 15 August Weekend Summary Friday Saturday Sunday

Weekend summary: Friday Beam recovery LHC not available yet in the morning PS problem (fixed at noon) LHC implementing protections for the faulty dipole ATLAS calibrations CTP sw tests (very quick), not done the longer test announced in the morning; CSC test: From now on, CSC will NOT give "LatenctMismatch" error, and will just set the latency correctly without any expert intervention. CTP + L1 topo test Afternoon standalone long tests for several subdetectors: Tile, CSC, TGC, MDT (testing recovery of the chambers in standalone) ATLAS data taking LHC planning a first full round with 3b only  Defining keys as STANDBY [~19] a first injection but beam dumped  21:35 New access needed to fix beam dump system at point6 [00:38] Stable beam for 3bunches Fill 5194, just few minutes [05:51] Stable beam for 2722b Fill 5196  just few minutes

Fill 5194 – Run 306247 – Single_3b_2_2_2_with_nc_probes [00:00] Switch to standby keys for 3b. However L1_RD0_UNPAIRED_ISO went up to ~2 kHz since prescale of ~65000 got set to 1 when moving to 3b standby keys  activate FFTV protection for IBL and cause 100% IBL busy. [00:20] Need a TTC reset of IBL was issued. [00:39] Stable beam 3 bunches 7’ with stable beam [00:43] Beam dump Fill 5196 – Run 306252 - 25ns_2172b_2160_1855_1948_96bpi_24inj 05:51 stable beams 05:55 beam dump due to electrical perturbation

Weekend summary: Saturday Physics 08:30 Stable beam for 2722b Fill 5197 16:43 Stable beam for 2722b Fill 5198

Fill 5197 – Run 306269 Peak lumi: 1.06 x 1034cm-2s-1 Lumi Ready Rec: 159 pb-1 Stable: 5h 15m 2172b_2160_1855_1948_96bpi_24inj Fill 5197 – Run 306269 [08:34] Pixel: noticed by chance during ADJUST that the PPC of ROD_L1_S10 was stuck. Tried to recover before declaration of stable beams Ready for physics delayed by ~3’. PPC status should be checked routinely until an automatic monitoring can be established. [08:38] Stable beam Enabled several additional L1Topo items. The L1 rates all seem fine and the stream rate is around 40 Hz. Trigger shifter noticed that some Predictions need to be updated. L1_3J50 looks wrong to be followed up. [13:52] Beam lost due to BLM UFO Some busy by RPC, TGC, Pixel, SCT

Fill 5198 – Run 306278 Peak lumi: 1.08 x 1034cm-2s-1 Lumi Ready Rec: 392 pb-1 Stable: 16h 23m 2172b_2160_1855_1948_96bpi_24inj Fill 5198 – Run 306278 16:35 noticed in adjust some delay (1-2’) between the ATLAS pref lumi and the ‘same’ information in page1. It is correct in ATLAS toLHC tab [16:43] Stable beam 21:45 LAR EMEC HV TRIP - recovered 01:12 power cycle of Tile Module LBC44 DQ In histogram "Eta-phi of tracks with no IBL hit but hit is expected, ratio to total tracks" in OHP, there are some hits expected (but without IBL hit) around (eta,phi)=(-2.5 , -1.5). MDT got 50% busy on and off around 07:42 for 5 minutes. The offending channel was BC-0 and it was fixed by itself at 07:48. [09:02] Beam dumped Some busy by IBL, SCT, MDT

Weekend summary: Sunday Data Taking Changed EMECA HV Module as 4 channels do not work LHC raising to 2220b

Fill 5199 – Run 306310 Peak lumi: 1.04x1034cm-2s-1 Lumi Ready Rec: pb-1 Stable: 25ns_2220b_2208_1940_2036_96bpi_24inj Fill 5199 – Run 306310 25ns_2220b_2208_1940_2036_96bpi_24inj [13:01] Stable beam [] Beam lost