The HERMES dual-radiator ring imaging Cherenkov detector

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Authors N Akopov, E.C Aschenauer, K Bailey, S Bernreuther, N Bianchi, G.P Capitani, P Carter, E Cisbani, R De Leo, E De Sanctis, D De Schepper, V Djordjadze, B.W Filippone, S Frullani, F Garibaldi, J.-O Hansen, B Hommez, M Iodice, H.E Jackson, P Jung, R Kaiser, J Kanesaka, R Kowalczyk, L Lagamba, A Maas, V Muccifora, E Nappi, K Negodaeva, W.-D Nowak, T O'Connor, T.G O'Neill, D.H Potterveld, D Ryckbosch, Y Sakemi, F Sato, A Schwind, T.-A Shibata, K Suetsugu, E Thomas, M Tytgat, G.M Urciuoli, K Van de Kerckhove, R Van de Vyver, S Yoneyama, H Zohrabian, L.F Zhang
Journal/Conference Name Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Paper Category
Paper Abstract The construction and use of a dual radiator Ring Imaging Cerenkov(RICH) detector is described. This instrument was developed for the HERMES experiment at DESY which emphasizes measurements of semi-inclusive deep-inelastic scattering. It provides particle identification for pions, kaons, and protons in the momentum range from 2 to 15 GeV, which is essential to these studies. The instrument uses two radiators, C4F10, a heavy fluorocarbon gas, and a wall of silica aerogel tiles. The use of aerogel in a RICH detector has only recently become possible with the development of clear, large homogeneous and hydrophobic aerogel. A lightweight mirror was constructed using a newly perfected technique to make resin-coated carbon-fiber surfaces of optical quality. The photon detector consists of 1934 photomultiplier tubes for each detector half, held in a soft steel matrix to provide shielding against the residual field of the main spectrometer magnet.
Date of publication 2002
Code Programming Language C++

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