LHC Beam Commissioning meeting - 17th March 2009
Present (ish): Etienne Carlier, Kajetan Fuchsberger, Rossano Giachino, Brennan Goddard, Jean-Jacques Gras, Lar Jensen, Verena Kain, Greg Kruk, Mike Lamont (chair), Alick Macpherson, Malika Meddahi, Mirko Pojer, Bruno Puccio, Ghislain Roy, Katarina Sigerud, Matteo Solfaroli, Ralph Steinhagen, Ezio Todesco, Jan Uythoven, Antonio Vergara Fernandez, Walter Venturini, Frank Zimmermann.
Reported by Mike Lamont
Presentations
Beam tests
See Malika's presentation above
Summary table:
|
Date |
Comments |
Extraction TT40/TT60 |
Week 21 |
|
Interleaved and sequencing with LHCFAST cycle |
Week 23 and/or 24 |
Parallel MD |
TI8 test |
6-7 June |
|
Extraction Test – part II |
Week 25 |
Dedicated MDs at the end of the 1st Long Injector MD block in week 25 (for high intensity, interleaved and sequencing).
High intensity = 288 x 5 x 10^10 ppb |
TI2 test |
27-28 June |
LHCb interested - consider possibility of interleaved injection. |
Transfer line test backup |
15/16 August |
LHCb interested in multiple shots on TI8 TED. |
Injection test – beam 2 |
5/6 September |
Multi-bunch to be tested (In the PS the radial loop has been identified as the first (low) intensity limitation at around 1.4 10^11 ppp total intensity, i.e. 12 bunches with 1.2 10^10 p/b.) |
Injection test – beam 1 |
12/13 September |
Unsynchronized extraction of ions might be possible. Would have to wait 2 more weeks for full synchronization (see below) |
- Given fluidity of schedule - aim to finalize dates of injection tests in May. Beam 2 injection certain to slip.
- RP note - no issue with extraction tests
- RP note - for LHC tests - should aim to have no transport after tests. Planned intensities to RP.
- RP note - for higher intensities - check with Alice, check need for access to zone after test.
Availability of Ions (c/o Philippe Baudrenghien, Elias Metral)
- Before we extract ions from the SPS we have to accelerate them. We start re-commissioning the SPS ions on week 33 (Aug 10th). If progress goes smooth we should be able to extract on week 36 but without synchronization with the LHC RF. This mode was used for the first proton injection tests in the LHC in Summer 2008 when re-phasing was not operational yet. It can be used to debug/adjust the transfer line. BI observation should work. (Same as p to LHC injection tests).
- Reducing to 1 bunch does not change the schedule.
- Full synchronism with the LHC RF will only be completed towards the end of the commissioning period (week 38-39).
Controls
See Eugenia's presentation above
- RBAC/CMW official release has now been made (in week after meeting). See slide 3.
- Proxy tests to be performed. It was questioned whether or not we should us proxies for critical stuff such as SISs.
- Timing tests also to be performed.
- 16 TB of space to be supplied which will mirror everything that makes its way to /user/slops/data. This space will not be actively back-up but anything on /user/slops/data will be covered by RAID and zipped off to CASTOR as before. It was felt this was a good solution and appropriate to our needs.
- SDDS logging configuration to be re-visited.
- Operational hypercycle to be defined.
Dry Runs
See Verena's presentation above
- RBAC roles and rules to be defined. To be followed up by Reyes.
- Would like 10 Hz energy logging - logging database ruled out - to where? (More general problem - where to stick higher frequency logging.)
- Lars - forget SRT for the moment.
- Week 14 for injection, week 17 for injection and LDBS software tests.
- Could do with some MD for dynamic beam configuration without extraction plus some more specific targeting of system tests.