Performance of the CAPRICE98 balloon-borne gas-RICH detector

被引:8
作者
Bergström, D [1 ]
Boezio, M
Carlson, P
Francke, T
Grinstein, S
Weber, N
Suffert, M
Hof, M
Kremer, J
Menn, W
Simon, M
Stephens, SA
Ambriola, M
Bellotti, R
Cafagna, F
Castellano, M
Ciacio, F
Circella, M
De Marzo, C
Finetti, N
Papini, P
Piccardi, S
Spillantini, P
Bartalucci, S
Ricci, M
Bidoli, V
Casolino, M
De Pascale, MP
Morselli, A
Picozza, P
Sparvoli, R
Barbiellini, G
Schiavon, P
Vacchi, A
Zampa, N
Mitchell, JW
Ormes, JF
Streitmatter, RE
Bravar, U
Stochaj, SJ
机构
[1] Royal Inst Technol, Stockholm, Sweden
[2] Ctr Rech Nucl, Strasbourg, France
[3] Univ Siegen, D-5900 Siegen, Germany
[4] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[5] Univ Bari, INFN Sect, Bari, Italy
[6] Univ Bari, Dept Phys, Bari, Italy
[7] Univ Florence, INFN Sect, Florence, Italy
[8] Univ Florence, Dept Phys, Florence, Italy
[9] INFN Frascati, Nazl Frascati Lab, Frascati, Italy
[10] Univ Roma Tor Vergata, INFN Sect, Rome, Italy
[11] Univ Roma Tor Vergata, Dept Phys, Rome, Italy
[12] Univ Trieste, INFN Sect, Trieste, Italy
[13] Univ Trieste, Dept Phys, Trieste, Italy
[14] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[15] New Mexico State Univ, Las Cruces, NM USA
关键词
Cherenkov detector; balloon instrumentation; cosmic rays;
D O I
10.1016/S0168-9002(01)00202-9
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
A RICK counter using a gas radiator of C4F10 and a photosensitive MWPC with pad readout has been developed, tested in particle beam at CERN and used in the CAPRICE98 balloon-borne experiment. The MWPC was operated with a TMAE and ethane mixture at atmospheric pressure and used a cathode pad plane to give an unambiguous image of the Cherenkov light. The induced signals in the pad plane were read out using the AMPLEX chip and CRAMS. The good efficiency of the Cherenkov light collection, the efficient detection of the weak signal from single UV photons together with a low noise level in the electronics of the RICH detector, resulted in a large number of detected photoelectrons per event. For beta similar or equal to 1 charge one particles, an average of 12 photoelectrons per event were detected. The reconstructed Cherenkov angle of 50 mrad for a beta similar or equal to 1 particle had a resolution of 1.2 mrad (rms). The RICH was flown with the CAPRICE98 magnetic spectrometer and was the first RICH counter ever used in a balloon-borne experiment capable of identifying charge one particles at energies above 5 GeV. The RICH provided an identification of cosmic ray antiprotons up to the highest energies ever studied (about 50 GeV of total energy). The spectrometer was flown on 28-29 May 1998 from Fort Summer, New Mexico, USA. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:161 / 174
页数:14
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