Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Beschleunigerphysik VII (Strahldynamik/Simulation)

HK 47.2: Vortrag

Dienstag, 5. März 2013, 17:00–17:15, WIL-C203

Bunch-by-Bunch Analysis of the LHC Heavy-Ion Luminosity and Potential Future Upgrades — •Michaela Schaumann — CERN, Geneva, Switzerland — RWTH Aachen, Aachen, Germany

The lead-ion bunches in the LHC are strongly influenced by intra-beam scattering, especially on the injection plateau of the LHC and even more of the SPS. In combination with the different times the bunches spend at each injection plateau, this results in a spread of the luminosity produced in each bunch crossing. The particle losses during collisions are dominated by nuclear electromagnetic processes, leading to a non-exponential intensity decay during the fill and short luminosity lifetime. The beam and luminosity evolution of the 2011 run was analysed bunch-by-bunch and compared with simulations. Based on this analysis, estimates of the potential luminosity performance at 6.5 Z TeV, after the present shutdown, and options to increase the luminosity are discussed.