IMPROVEMENTS IN OR RELATING TO CONDENSER DOSIMETERS AND ELECTROMETER READERS FOR USE THEREWITH
The patented design of a condenser chamber dosimeter and an electrometer reader to be used with it provmdes for the inner electrode of the dosimeter and the input terminal, of the reader to be capacitatively coupled together when making a reading. The dosimeter has 3 concentric electrodes. The polarizing electrode is close to the outermost electrode and is charged to a high potential, while the outer and inner electrodes are held at ground. When the chamber is irradiated, a charge flows from the polarizing electrode to the inner electrode, causing a potential difference, which is directly proportional to the dose received, to appear between the outer and inner electrodes. To read the potential difference, an electrometer is attached to the dosimeter. The inner electrode of the dosimeter has a recess into which the probe input terminal of the electrometer is inserted. The electrometer is concave and dimensioned to fit closely around the casing of the dosimeter to ensure that the probe will not touch the inner electrode. The electrometer does not change the voltage on the dosimeter, so that repeated readings will be the same, provided no radiation dose is received between readings. (M.P.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-030891
- OSTI ID:
- 4702158
- Report Number(s):
- GB 926170
- Resource Relation:
- Patent File Date: 1959 Oct 27; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United Kingdom
- Language:
- English
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