proportional ionization chamber

proportional ionization chamber

[prə′pȯr·shən·əl ‚ī·ə·nə′zā·shən ‚chām·bər]
(electronics)
An ionization chamber in which the initial ionization current is amplified by electron multiplication in a region of high electric-field strength, as in a proportional counter; used for measuring ionization currents or charges over a period of time, rather than for counting.
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