Title :
Identification of antiprotons in space using a compact RICH counter
Author :
Francke, Tom ; Suffert, Martin ; Carlson, Per
Author_Institution :
CRN, Strasbourg, France
Abstract :
A compact RICH (ring imaging Cherenkov) counter has been developed that has a very good separation power (10/sup -4/) between antiprotons and pions/muons up to 6 GeV/c momentum at perpendicular incidence and up to 2.3 GeV/c momentum at 25 degrees incidence angle of the particle. It uses a solid radiator of NaF and a photosensitive MWPC (multiwire proportional chamber) with pad readout to detect the faint Cherenkov light. Twenty photoelectrons are detected per event for beta =0.94 particles and 12 for beta =1 particles at perpendicular incidence. Such a detector will be used in a balloon-borne spectrometer to measure the energy spectrum of antiprotons and positrons in cosmic rays up to 6 GeV kinetic energy.<>
Keywords :
Cherenkov counters; cosmic ray apparatus; cosmic ray energy spectra; cosmic ray protons; position sensitive particle detectors; proportional counters; time of flight spectrometers; 2.3 to 6 GeV; NaF; antiprotons; balloon-borne spectrometer; compact RICH counter; cosmic rays; energy spectrum; multiwire proportional chamber; pad readout; photosensitive MWPC; positrons; ring imaging Cherenkov counter; solid radiator; Cosmic rays; Counting circuits; Detectors; Energy measurement; Event detection; Kinetic energy; Mesons; Positrons; Solids; Spectroscopy;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259104
