Multiplate wide-gap spark chamber for a gamma-ray telescope

Details Multiplate wide-gap spark chamber for a gamma-ray telescope Multiplate wide-gap spark chamber for a gamma-ray telescope

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978izyak..42.1102v&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Yakutsk, USSR, June 1977.) Akademiia Nauk SSSR, Izvestiia, Seriia Fizicheska

Computer Science

Performance

Gamma Ray Telescopes, Spark Chambers, Beams (Radiation), Calibrating, Particle Accelerators, Positrons

Scientific paper

A 12-plate wide-gap spark chamber to be used in a large gamma-ray telescope is described. This spark chamber was calibrated by means of positron and 'labelled' gamma-ray beams from a particle accelerator. Specific performance results are discussed which were obtained with spark modules consisting of aluminum plates 2 mm thick (for the HV electrode) and 4 mm thick (for the ground electrode). The angular accuracy in measuring the arrival direction of a 100-MeV gamma ray is shown to be about 2 deg of arc for normal incidence and about 3 deg of arc for deflection. The accuracy in measuring gamma-ray energy is approximately 30% for energies of 50 to 200 MeV.

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