Dresden 2014 – scientific programme
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BE: Beschleunigerphysik
BE 1: Hadron Accelerators and Colliders
BE 1.6: Talk
Monday, March 31, 2014, 17:15–17:30, MOL 213
Origins of Transverse Emittance Blow-up during the LHC Energy Ramp — •Maria Kuhn1,2, Gianluigi Arduini1, Verena Kain1, Andy Langner1,2, Yannis Papaphilippou1, Michaela Schaumann1, and Rogelio Tomas1 — 1CERN, Geneva, Switzerland — 2University of Hamburg, Hamburg, Germany
During LHC Run 1 about 30 % of the potential peak performance was lost due to transverse emittance blow-up through the LHC cycle. Measurements indicated that the majority of the blow-up occurred during the energy ramp. Until the end of LHC Run 1 this emittance blow-up could not be eliminated. In this presentation the measurements and observations of emittance growth through the ramp are summarized. Simulation results for growth due to Intra Beam Scattering will be shown and compared to measurements. A summary of investigations of other possible sources will be given and backed up with simulations where possible. Requirements for commissioning the LHC with beam in 2015 after Long Shutdown 1 to understand and control emittance blow-up will be listed.