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Title: Collimation dependent beam lifetime and loss rates in the LHC
Authors: Wollmann, Daniel
Assmann, Ralph W.
Bruce, Roderik
Burkart, Florian
Cauchi, Marija
Deboy, Daniel
Redaelli, Stefano
Rossi, Adriana
Valentino, Gianluca
Keywords: Proton beams -- Measurement
Colliders (Nuclear physics)
Large Hadron Collider (France and Switzerland)
Issue Date: 2011
Publisher: IPAC
Citation: Wollmann, D., Aßmann, R. W., Bruce, R., Burkart, F., Cauchi, M., Deboy, D.,...Valentino, G. (2011). Collimation dependent beam lifetime and loss rates in the LHC. 2nd International Particle Accelerator Conference, Kursaal. 3744-3746.
Abstract: The four primary collimators in each LHC beam define the smallest aperture. Particles with high betatron amplitudes or momentum offsets will therefore hit first a primary collimator. The instantaneous particle loss rate at primary collimators measured by precise beam loss monitors (BLM) is an important measure for the global lifetime of the beams and a major ingredient to identify collimation induced performance limitations in the LHC. These loss rates have been measured during a number of LHC fills, featuring both "good" fills with high luminosity and "bad" fills with beam instabilities. The beam lifetime at the collimators was then calculated from these data for different cases. The results are presented and interpreted within this paper.
ISBN: 9789290833666
Appears in Collections:Scholarly Works - FacICTCCE

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