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Friday to Saturday 02:00: Machine closed. 09:00: Cryogenics all OK. Preparing pre-cycle. 10:00: Pre-cycle started. 11:30: Pre-cycle finished. 14:00: Beam.

Published byGrace Chambers Modified over 8 years ago

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Presentation on theme: "Friday to Saturday 02:00: Machine closed. 09:00: Cryogenics all OK. Preparing pre-cycle. 10:00: Pre-cycle started. 11:30: Pre-cycle finished. 14:00: Beam."— Presentation transcript:

1 Friday to Saturday 02:00: Machine closed. 09:00: Cryogenics all OK. Preparing pre-cycle. 10:00: Pre-cycle started. 11:30: Pre-cycle finished. 14:00: Beam back. Orbit corrections, injection check, tune adjustments. 15:00: PIC on 60A power converters. 16:00: Beam back. Chromaticity adjustments. Beta beat. Orbit feedback tests. LSA bugs. 21:00: Start of ramp with beam to 1.18 TeV. Arrive very nicely at top at 21:11. Availability (to 21:00): 11h00. Unplanned maintenance: 1h00. Planned maintenance: 9h00

2 Saturday TOTEM test finished very successfully!  All case studies were tested and the interlock logic is OK for all of them.  Results of tests documented online with snapshots. All cases associated to beam dumps are also documented by global PM events Philippe who finished the RF adjustments in SR4:  The Front-End of the phase loop has been adjusted to prepare for bunch intensity increase.  Both rings can now take at least 5E10 single bunch. Exactly what intensity limit will be clarified on Monday...Hopefully up to nominal.  With these settings we can still deal with single-bunch pilot 5E9 OK. However how far below 5E9 will be clarified on Monday. LHC status 9-3-10

3 Summary of aperture measurements. We could complete the phase space coverage for both H and V planes of beam 1. Work was done in parallel with RF tuning in preparation for higher intensities ("cross talk" not always transparent...).  Measurements were done with orbit bumps at different phases. Loss location are listed in detail in the logbook for the different cases.  Reference machine: golden orbit used for collimator setup, separation bumps on in all IPs.  No indication of major problems with the aperture. Measurements with golden orbit and with corrected beta-beat indicate a better aperture than last year. Detailed look at the data is needed to take into account the measured beta values. Main aperture bottlenecks: Q4 quadrupoles in IP6, Q6- L2 and Q6-R2. Complete list in logbook LHC status 9-3-10

4 ramp LHC status 9-3-10

5 Schedule LHC status 9-3-10 5 e10

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