The Basic Design Data of a Guarded-Field Thimble Ionization Chamber - An Analogue Investigation

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Abstract
The potential distribution in various guarded-field ionization chambers was obtained from a Resistance Network Analogue and shown to be in agreement withprevious analytical and numerical work. The potential in a typical peg-type chamber was investigated and the results emphasize a number of dis -advantages of this type of chamber. The analogue also provides a means of improving the design of the peg-type chamber. Finally, a simple technique was described which enables the collecting volume for the guarded-field chambers to be obtained directly from the analogue, and the data obtained by this technique are shown to be in good agreement with the analytical data deduced previously.