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TY - CONF AU - Van Dijk, M.W.U. AU - Banerjee, D. AU - Bernhard, J. AU - Brugger, M. AU - Charitonidis, N. AU - D'Alessandro, G. AU - Doble, N. AU - Gatignon, L. AU - Gerbershagen, A. AU - Montbarbon, E. AU - Moulson, M. AU - Rae, B. AU - Rosenthal, M.S. AU - Veit, B. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The K12 Beamline for the KLEVER Experiment J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The KLEVER experiment is proposed to run in the CERN ECN3 underground cavern from 2026 onward. The goal of the experiment is to measure BR(KL -> pi0 nu nu), which could yield information about potential new physics, by itself and in combination with the measurement of BR(K+ -> pi+ nu nu) of NA62. A full description will be given of the considerations in designing the new K12 beamline for KLEVER, as obtained from a purpose made simulation with FLUKA. The high intensities required by KLEVER, 2·10¹³ protons on target every 16.8s, with 5·10¹⁹ protons accumulated over 5~years, place stringent demands on adequate muon sweeping to minimize backgrounds in the detector. The target and primary dump need to be able to survive these demanding conditions, while respecting strict radiation protection criteria. A series of design choices will be shown to lead to a neutral beamline sufficiently capable of suppressing relevant backgrounds, such as photons generated by pi0 decays in the target, and Lambda -> npi0 decays, which mimic the signal decay. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3726 EP - 3729 KW - target KW - photon KW - detector KW - experiment KW - background DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW061 UR - http://jacow.org/ipac2019/papers/thpgw061.pdf ER -