EXTERIOR QUENCHING OF GEIGER MULLER COUNTERS (in Czech)
ABS>The lifetime of argon-alcohol filled GM tubes, measured in total output counts, is significantly influenced by the presence of an exterior quenching circuit. In cosmic ray monitoring, these GM tubes must be very stable.over a time span of the order of ten years. The stability is directly related to the lifetime. GM tubes operating without an external quenching circuit are reported to have a lifetime of about half that of GM tubes directly coupled to a slow monostable quenching circuit and pulse shaper. The slow quenching circuit is compared to a fast monostable circuit capacitatively coupled to the GM tubes. The fast circuit yields a deadtime of 200 to 300 microseconds and a lifetime for the GM counting tubes that is about 10 times greater than with the slow quenching circuit. The latter yields a deadtime of about 1.5 milliseconds. Finally, lifetime studies were made in a configuration that coupled a variable number of GM tabes to a single fast-quenching circuit. The long lifetime is preserved for banks of 1, 2, 6, and 12 counters, but a slow, monotonic decrease in lifetime with increase in number of counters in the bank is observed. (TTT)
- Research Organization:
- Physics Inst., Czechoslovak Academy of Sciences, Prague
- NSA Number:
- NSA-15-019590
- OSTI ID:
- 4070144
- Journal Information:
- Jaderna energie, Journal Name: Jaderna energie Vol. Vol: 7
- Country of Publication:
- Country unknown/Code not available
- Language:
- Czech
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