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TY - CONF AU - Markiewicz, T.W. AU - Aberle, O. AU - Bertarelli, A. AU - Bong, E.L. AU - Gradassi, P. AU - Keller, L. AU - Marsili, A. AU - Redaelli, S. AU - Rossi, A. AU - Salvachua, B. AU - Valentino, G. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Construction and Bench Testing of a Prototype Rotatable Collimator for the LHC J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - A second generation prototype rotatable collimator has been fabricated at SLAC and delivered to CERN for further vacuum, metrology, function and impedance tests. The design features two cylindrical Glidcop jaws designed to each absorb 12kW of beam in steady state and up to 60kW in transitory beam loss with no damage and minimal thermal distortion. The design is motivated by the use of a radiation resistant high Z low impedance readily available material. A vacuum rotation mechanism using the standard LHC collimation jaw positioning motor system allows each jaw to be rotated to present a new 2cm high surface to the beam if the jaw surface were to be damaged by multiple full intensity beam bunch impacts in a asynchronous beam abort. Design modifications to improve on the first generation prototype, pre-delivery functional tests performed at SLAC and post-delivery test results at CERN are presented. PB - JACoW CP - Geneva, Switzerland SP - 178 EP - 181 KW - vacuum KW - impedance KW - collimation KW - controls KW - operation DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-MOPRO044 UR - http://jacow.org/ipac2014/papers/mopro044.pdf ER -