00:15: Stable beams fill 1883, 1.1E33 cm-2s-1.  Seems the 144 bunches beam 1 doe not fit properly on the injection kicker waveform. Systematically the.

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Presentation transcript:

00:15: Stable beams fill 1883, 1.1E33 cm-2s-1.  Seems the 144 bunches beam 1 doe not fit properly on the injection kicker waveform. Systematically the last 5 bunches are kicked.  Kicklength for beam 1 shorter than for beam 2: beam 1: 7.85 us beam 2: 8.1 us.  Injection kicker pulse length increased by 200 ns on B1. Operational limits in injection kicker app updated accordingly. IQC limits also adjusted.  Updated the operational limits for the MKIs...these were still rather relaxed. 18:15: fill #1883 dumped by SIS interlock (OFSU down)  47.5 pb-1 in around 18 hours. Refill delayed due to RF problems (noise) in the SPS. Tuesday June 21 st LHC morning report

Long fill #1883 after 15h in stable beams LHC morning report

47.7/46.3 pb-1 collected LHC morning report

18:44 Summary of BLM intervention:  Configuration for Mobile monitors have been deployed in LSA. We need to restart the concetrator in order to pickup the new configuration.  Restarted the COLSA  Restarted the COLSA3  Result: The 6 new monitors appear in the display. the 2 of them which have been already connected show a signal.  Note: the remaining 4 channels need still configuration in the processing electronics and (probably) access. to be done at a later time. QHPS is discharging in S12 (cell 23.L2).  Masked the SW interlock "RB_A12_QPS_OK" because one of the quench heaters on MB.A23L2 is discharged. Tuesday June 21 st LHC morning report

01h30: Pilot bunches from SPS  stopped due to a number of things: bad beam quality in the SPS, Persistent BPM LSS4(new) interlock, crash of BIC cfv-ba4-cibtt40 When injecting beam:  the injection oscillations on the horizontal plane for both B1 and B2 were very large (~4mm) and not realistically correctable.  The horizontal emittances were bimodal and very large... something was kicking the beam in the horizontal plane.  Suspect that there is still a problem with the RF synchronisation & rephasing between SPS and LHC. (Note that CNGS worked well over night, so for us this rules out beam position at extraction.) Beam dump at 07:45 (if at 3.5 TeV). Machine on standby at 08:30 at the latest - until 12:30. No access. Wednesday June 22 nd LHC morning report

Injection Oscillations LHC morning report

Distribution LHC morning report

Screen LHC morning report

12:30: Restart the accelerators. Check injection kicker pulse. Collimation loss maps (450 GeV, 3.5 TeV): ran out of 4 week qualification interval. Next intensity step: 1092b  1236b Ahead LHC morning report