Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ijrsp..20..272d&link_type=abstract
(Thirty years of scientific ballooning in India; Symposium, Hyderabad, India, Oct. 22-24, 1990, Selected Papers. A92-23051 08-99
Astronomy and Astrophysics
Astronomy
Balloon-Borne Instruments, Cosmic X Rays, Electronic Control, X Ray Astronomy, Automatic Test Equipment, Proportional Counters
Scientific paper
An electronic logic system has been developed to evaluate and process X-ray events in 20-100 keV energy range from multi-cell xenon filled proportional counters used in X-ray astronomy. The electronic system consists of X-ray event selection logic, pulse height analyzer, K-fluorescent gating and arrival time tagging. Using 'K-fluorescent gating technique', improved energy resolution for incident X-ray energies above 34 keV is achieved. The X-ray event selection logic is designed to obtain higher background rejection efficiency for charged particles and Compton events. It provides significant advantage in studying weak cosmic X-ray sources as well as detecting spectral line features in the field of hard X-ray spectroscopy from balloon-borne telescope. The telemetry system used is formatting the event location and digitized energy information with a dead time of 1.28 ms. To reduce the dead time of the system, buffer memories are used with proper time tagging.
Dedhia D. K.
Shah M. R.
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