Abstract

The NA62 RICH must separate charged pions from muons in a 15–35 GeV/ c momentum range. The detector will have a 17 m long, 4 m wide cylindrical vessel, filled with neon at an atmospheric pressure. A mosaic of 20 mirrors, with 17 m focal length will be placed at the downstream end of the vessel while 2000 single anode photomultipliers will be placed at the upstream part. Two test beams were held at CERN in 2007 and 2009 with a RICH prototype. A muon suppression factor greater than 100 was validated.

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