Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1997-03-18
1997-12-30
Glick, Edward J.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250378, G01T 102, G01T 114
Patent
active
057033706
ABSTRACT:
A sensor from a carbon fiber, self-reading electrometer type of dosimeter made with a radically modified ionization chamber in order to determine the angular differential dose of ionizing radiation. The chamber is flat and its size is increased so that it is operable from intensities of 100 nGy(T) h.sup.-1 to 10.sup.4 Gy(T) h.sup.-1. This performance range can be accomplished by the addition of capacitors to reduce the dosimeter's basic sensitivity. The capacitors should be connected in parallel between the electrometer assembly and ground. Additionally, the ionization chamber is lined, or in effect "sandwiched," between a low atomic number "low Z" material and a high atomic number "high Z" material. In one embodiment, a hermetically sealed plastic housing is lined on one surface with a lead (Pb) plate and the remainder of the housing is painted on the inside except the side with the lead plate) with a carbon paint. In so modifying the chamber, there will be a difference in the ionization effect coming from the lead side than from the low Z material side. By this difference in signal, one can determine the angular differential dose of radiation.
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patent: 4697084 (1987-09-01), Fox
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Brucker George J.
Kronenberg Stanley
Anderson William H.
Glick Edward J.
Tereschuk George B.
The United States of America as represented by the Secretary of
Zelenka Michael
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