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Sunday 12th

Sunday 12th. 00:29 Stable beam fill #1864. Initial lumi 1.1e33 07:17 beam dumped by trip of RD2.L1 Integrated lumi 23 pb-1 10:30 Cryo maintain back 11:30 Injecting - some injection steering 13:56 Stable beam fill #1865 . Initial lumi 1.1e33

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Sunday 12th

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  1. Sunday 12th • 00:29 Stable beam fill #1864. Initial lumi 1.1e33 • 07:17 beam dumped by trip of RD2.L1 • Integrated lumi 23 pb-1 • 10:30 Cryo maintain back • 11:30 Injecting - some injection steering • 13:56 Stable beam fill #1865. Initial lumi 1.1e33 • 03:22 Beams dumped, collimator interlock • Integrated lumi42 pb-1 • 05:00 Access for change of power converter • 07:13 Injecting probe beam LHC 8:30 meeting

  2. Trip of RD2.L1 Michel Combe Bus-bar quench, following cryo valve control problem Heaters fired, quenched RD2.L1 Vacuum valves in around RD2.L1 following vacuum spike,2.1 s after dump request by PIC LHC 8:30 meeting

  3. Fill #1865 – LHCb levelling problem Richard Jacobsson • We went for too high with the optimize all routine for LHCb which went up to 600 (ub.s)^-1! It looks like we were heads on in Vertical and completely OFF in Horizontal. The Optimize All (in H plane) put us too much in collisions. We tripped LHCb. • Put manually LHCb to 250 (ub.s)^-1 on request of LHCb, with levelling OFF • Smoothly restarted the leveling 1/2 hour later @ 300 (ub.s)^-1 • Short term improvements to prevent this in the future LHC 8:30 meeting

  4. Including fill #1865: @ 915 pb-1 LHC 8:30 meeting

  5. Integrated efficiency indicator Temperatures Bunch length • MKI profiting from the longer bunch lengths • Like cryo, collimators,.... LHC 8:30 meeting

  6. Plan • Physics 1092 x 1092 bunches, trains 144 bunches • Not for today • Physics 1236 x 1236 bunches, trains 144 bunches • rMPP approval procedure OK • After RF main power coupler conditioning, which would otherwise be at the limit • Outstanding • End of fill: TCL adjustment • Q’ decay following long fill LHC 8:30 meeting

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