TRANSISTORIZED PULSE AMPLIFIERS. 3. A TRANSISTOR AMPLIFIER FOR USE WITH METHANE PROPORTIONAL COUNTERS
A transistor pulse amplifier for use with methane proportional counters is described. The counter operation and the characteristics of the electrical output signals are described. Voltage and current pulse waveforms are related, and the use of the short duration current pulse to obtaia a smaller resolving time amplifier is pointed out. The practical amplifler uses low input impedance current amplifying stages throughout. The individual stages are described in detail. Plateaus obtained from an Sr/sup 90/ source in a 4 pi flow counter show slopes of less than 0.15% per 100v over a range of more than 300v at counting rates up to more than 34 x 10/sup 3/ per sec. The estimated minimum detectable input pulse corresponds to about 20 ion pairs with this system. The amplifier physical construction employing printed plug-in cards is described in detail and illustrated. A vacuum tube preamplifier is described which enables the detection of pulses arising from the formation of 2 to 3 ion pairs. (auth)
- Research Organization:
- Atomic Energy of Canada Ltd. Chalk River Project, Chalk River, Ont.
- NSA Number:
- NSA-14-001628
- OSTI ID:
- 4214187
- Report Number(s):
- CREL-828; AECL-886
- Resource Relation:
- Other Information: For presentation at the Canadian Convention of the Institute of Radio Engineers, Toronto, Ontario, October 7-9, 1959. Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Canada
- Language:
- English
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