LHC Performance Workshop - Chamonix 2012

Session

S04 - Strategy for 2012 (II)

7 Feb 2012, 17:00

Chamonix

Conveners

S04 - Strategy for 2012 (II)

• Oliver Bruning (Chair)
• Laurette Ponce (Scientific Secretary)

Presentation materials

Minutes

discussion.pdf

32. Beam Energy

Andrzej Siemko (CERN)

07/02/2012, 17:00

The limiting factors for operating the LHC at higher energies with defective 13 kA busbar joints will be reviewed. The experience gained during the 2011 run, including the quench statistics and dedicated quench propagation tests will be presented. The possible operational limits from the by-pass diode contact resistance issue will be addressed. Finally, a proposal for running at the highest...

33. Optics Options

Massimo Giovannozzi (CERN)

07/02/2012, 17:30

The experience from the past LHC proton run has provided plenty of information and can be used to define possible scenarios for the 2012 physics run. The key parameters such as beta* and crossing angle will be reviewed assuming a 4 TeV beam energy and considering options for 25 ns and 50 ns. Possible scenarios for the high-beta optics configuration during the 2012 run will be presented.

35. Collimation settings and performance

Roderik Bruce (CERN)

07/02/2012, 18:00

Collimator settings and available aperture are key parameters for deciding the reach in beta*. Based on MDs and operational experience in 2011, a review is given of the measured aperture and the achievable margins and settings of the collimators. In particular, the tight collimation scheme is evaluated in terms of possible gains and necessary operational changes.

37. Performance Reach in the LHC for 2012

Gianluigi Arduini (CERN)

07/02/2012, 18:30

Based on the 2011 experience and Machine Development study results the performance reach of the of the LHC with 25 and 50 ns beams will be addressed for operation at 3.5 and 4 TeV. The possible scrubbing scenarios and potential intensity limitations resulting from vacuum, heating will be taken into account wherever possible.

39. MD plans in 2012

Ralph Wolfgang Assmann (CERN)

07/02/2012, 19:00

Machine development sessions were performed in 2011 during dedicated slots of beam time. These MD studies were scheduled and planned in detail well before, reflecting the agreed priorities: further optimizing machine performance, exploring beam parameters beyond design targets, assessing machine limitations, testing new concepts and machine settings. The MD's in 2012 will build on the...

40. Ions in 2012

John Jowett (CERN)

07/02/2012, 19:30

Review of the options for the heavy ion run in 2012: proton-lead or lead-lead or time-sharing between the two. The implications of running at special energies choice of bunch spacing and filling scheme. Performance expectations in the light of the first p-Pb test, further MD on p-Pb and the 2011 Pb-Pb run. Possibilities for future improvements and an outline of the programme between LS1 and LS3.