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TY - CONF AU - Kuhn, M. AU - Arduini, G. AU - Kain, V. AU - Langner, A. AU - Papaphilippou, Y. AU - Schaumann, M. AU - Tomás, R. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Origins of Transverse Emittance Blow-up during the LHC Energy Ramp J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - 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 paper 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. PB - JACoW CP - Geneva, Switzerland SP - 1021 EP - 1023 KW - emittance KW - luminosity KW - injection KW - simulation KW - brightness DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-TUPRO010 UR - http://jacow.org/ipac2014/papers/tupro010.pdf ER -