Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1978-12-04
1980-04-08
Anderson, Bruce C.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250388, G01T 118
Patent
active
041974620
ABSTRACT:
A position-sensitive proportional counter circuit is provided which allows the use of a conventional (low-resistance, metal-wire anode) proportional counter for spatial resolution of an ionizing event along the anode of the counter. A pair of specially designed active-capacitance preamplifiers are used to terminate the anode ends wherein the anode is treated as an RC line. The preamplifiers act as stabilized active capacitance loads and each is composed of a series-feedback, low-noise amplifier, a unity-gain, shunt-feedback amplifier whose output is connected through a feedback capacitor to the series-feedback amplifier input. The stabilized capacitance loading of the anode allows distributed RC-line position encoding and subsequent time difference decoding by sensing the difference in rise times of pulses at the anode ends where the difference is primarily in response to the distributed capacitance along the anode. This allows the use of lower resistance wire anodes for spatial radiation detection which simplifies the counter construction and handling of the anodes, and stabilizes the anode resistivity at high count rates (>10.sup.6 counts/sec).
REFERENCES:
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patent: 3704421 (1972-11-01), Blane
Borkowski et al., Rev. Sci. Inst., "Design and Properties of Position-Sensitive Proportional Counters Using Resistance-Capacitance Position Encoding," 46, (No. 8), pp. 951-962, 1975.
Farugi, IEEE Trans. Nucl. Sci., NS-22, (5), "Application of Nuclear Inst. Tech. to X-Ray Diffraction from Muscle," pp. 2066-2073, 1975.
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Kopp et al., Rev. Sci. Instruments, "Low-Noise Voltage-Sensitive Preamplifier with Output Stabilization by Pole-Zero Cancellation in the Feedback Circuit," 48, 1977, pp. 383-388.
Augustynia, K., et al., IEEE Trans. Nucl. Sci., NS-22, (5), "A Hybrid Approach to Two Dimensional Charged Particle Position Sensing Preserving Energy Resolution," 1972, pp. 196-200.
Anderson Bruce C.
Breeden David E.
Lupo R. V.
Poteat Robert M.
The United States of America as represented by the United States
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