Workshop Chamonix XV

Session

Session 01 - The minimum workable LHC - plans and requirements for beam commissioning, years 1 and 2

01

23 Jan 2006, 09:00

L'Esplanade du Lac, Divonne-les-Bains

73. Summary of overall commissioning strategy for protons

Roger Bailey (CERN)

23/01/2006, 09:00

After a brief reminder of the various requirements on the LHC, the strategy for a staged commissioning with protons is summarised. Typical machine parameters and associated performance levels are given for each stage. Dedicated runs with ions and protons are mentioned, and how machine operation may be scheduled through a year is shown.

71. Electrical circuits required for the minimum workable LHC during commissioning and first two years of operation

Massimo Giovannozzi (CERN)

23/01/2006, 09:25

In this report the issue of availability of electrical circuits, both for magnetic elements and for RF devices, is considered. Based on the agreed stages to commission and operate the LHC during the first two years, the minimum number of required circuits will be presented and discussed. The analysis will also consider how to deal with not required, but available circuits, as well as a...

72. Beam measurements required in the first two years of LHC commissioning

Frank Zimmermann (AB/ABP)

23/01/2006, 09:50

Many beam measurements are essential already in the first phase of the LHC commissioning. Others become necessary only as the intensity and the number of bunches is raised. I will review the beam measurements needed in the various phases of the LHC commissioning, their sequence, and the tools required for performing them. An earlier talk at Chamonix XII discussed beam measurements on...

65. Real Time Feedback required

Ralph Steinhagen (AB/OP)

23/01/2006, 10:45

In order to counteract disturbances due to the decay and snapback of multipole moments, misalignments, ground motion, and other dynamics effects, control of the key beam parameters orbit, tune, chromaticity and energy will be an integral part of LHC operation. Manual correction of those parameters may soon reach its limit with respect to required precision and expected time-scales....

90. Vacuum Conditions Required

Vincent Baglin (CERN)

23/01/2006, 11:10

Several years will be required to reach the LHC nominal performances. During the year 1 and 2, the LHC beam current will be limited, therefore the nominal performances of the vacuum system are not required. In this context, the vacuum performances for year 1 and 2 will be analysed. Particularly, the bake-out of the Long Straight Sections could be questioned. The implications of an...

81. Radiation Protection Constraints During the Life Time of LHC

Doris Forkel-Wirth (CERN)

23/01/2006, 11:35

The moment the first protons will be sent through LHC, the installation will become subject to CERN’s radiation protection legislation. Proper pre-cautions will have to be taken before the start-up of the machine and all significant radiation parameters like prompt radiation and activation will have to be continuously monitored from then on. Based on calculations, measurements and...

80. Beam Commissioning: Required Applications

Mike Lamont (LFC)

23/01/2006, 12:00

Effective commissioning of the LHC with beam demands a well-designed, coherent suite of high level software. The challenges include a large amount of heterogeneous equipment, large distributed beam instrumentation systems, the dynamic effects of superconducting magnets and tight constraints on the key beam parameters. All of which have to be dealt with while respecting the destructive...