Author/Authors :
Barbiellini، نويسنده , , G and Basini، نويسنده , , G and Bellotti، نويسنده , , Bocciolini، نويسنده , , M and Boezio، نويسنده , , M and Massimo Brancaccio، نويسنده , , F and Bravar، نويسنده , , U and Cafagna، نويسنده , , F and Candusso، نويسنده , , M and Carlson، نويسنده , , P and Casolino، نويسنده , , M and Castellano، نويسنده , , M and De Cataldo، نويسنده , , G and Circella، نويسنده , , M.T. and Codino، نويسنده , , A and Finett، نويسنده ,
Abstract :
A RICH detector capable of detecting unit charged particles, e.g. antiprotons and positrons, has been used successfully for the first time in a balloon-borne magnet spectrometer. The thin and compact CAPRICE RICH detector uses a NaF solid radiator, TMAE vapour as photo converter and cathode pad readout in the photosensitive MWPC operated at low gain. 15 photoelectrons are detected per ring for β = 1, perpendicular incidence particles giving a resolution on the Cherenkov angle of 8 mrad, increasing to 14 mrad at 20°C incidence angle. Besides particle identification on an event-by-event basis it efficiently rejects multiparticle events and albedo particles.
