Daniel Wollmann
12/16/10, 10:50 AM
Review of LHC machine protection and LHC collimation system. Constraints and requirements that crab cavities must comply with. Possible approaches for ensuring their compatibility.
Joachim Tuckmantel
(CERN)
12/16/10, 11:00 AM
Crab cavity failures such as abrupt amplitude and phase changes, RF trips, cavity quench are characterized with appropriate time scales. Their potential impact on the LHC beams and mitigation of such failure scenarios within the LHC machine protection constraints is discussed.
Kota Nakanishi
(Japan/KEK)
12/16/10, 11:20 AM
Cavity trips and associated RF & beam observations at KEKB. Types of trips, their signature and the (presumed) root causes. Possible mitigation schemes for LHC.
Rama Calaga
(BNL),
Tobias Baer
(Universitaet Hamburg)
12/16/10, 11:40 AM
Results from particle tracking using the LHC collimation system in Sixtrack and MADX to determine local signatures of the particle losses due to abrupt crab cavity failures. Detailed scans to determine specifications on fast cavity failures is derived to ensure machine preotection during the LHC cycle at ultimate intensities. Some aspects of upgrade optics is also studied.
Wolfgang Hofle
(CERN)
12/16/10, 12:00 PM
Transverse damper settings in the presence of crabbed beams and beam-beam. The interplay between the damper and the crab cavity for single bunch and bunch trains. Suppression of the effect of phase noise on the beam and of potential instabilities from crab cavities to relax tolerances on crab-cavity RF controls.
