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TY - CONF AU - Bracco, C. AU - Auchmann, B. AU - Bartmann, W. AU - Bednarek, M. AU - Lechner, A. AU - Sapinski, M. AU - Schmidt, R. AU - Shetty, N.V. AU - Solfaroli Camillocci, M. AU - Verweij, A.P. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Test and Simulation Results for Quenches Induced by Fast Losses on a LHC Quadrupole J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - A test program for beam induced quenches was started in the LHC in 2011 in order to reduce as much as possible BLM-triggered beam dumps, without jeopardizing the safety of the superconducting magnets. A first measurement was performed to assess the quench level of a quadrupole located in the LHC injection region in case of fast (ns) losses. It consisted in dumping single bunches onto an injection protection collimator located right upstream of the quadrupole, varying the bunch intensity up to 3·10¹⁰ protons and ramping the quadrupole current up to 2200 A. No quench was recorded at that time. The test was repeated in 2013 with increased bunch intensity (6·10¹⁰ protons); a quench occurred when powering the magnet at 2500 A. The comparison between measurements during beam induced and quench heaters induced quenches is shown. Results of FLUKA simulations on energy deposition, calculations on quench behaviour using QP3 and the respective estimates of quench levels are also presented. PB - JACoW CP - Geneva, Switzerland SP - 2706 EP - 2708 KW - injection KW - quadrupole KW - simulation KW - operation KW - proton DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-WEPRI092 UR - http://jacow.org/ipac2014/papers/wepri092.pdf ER -