TEPC gas gain measurements in propane
(2014) Radiation Protection Dosimetry — Vol. 161, n° 1-4, p. 459-463 (2014)
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- Abstract
- Knowledge of the gas gain is important to optimise the design and the operating characteristics of tissue-equivalent proportional counters (TEPCs), especially for simulated sites smaller than 1 μm. TEPC area monitors of the order of centimetres must operate at very low gas pressure to simulate micrometric volumes, consequently the Townsend theory cannot be applied: effects related to the presence of an electric-field gradient become important and must be considered. A detailed description of the electron avalanche formation is complex, but in most practical cases an analytical formula can be used. The so-called gradient-field model includes three characteristic constants of the counting gas, which were already experimentally determined for propanetissue equivalent (TE) and dimethyl ether (DME) gases. The aim of this work is to measure the gas-dependent parameters for propane gas. Preliminary results obtained with a spherical TEPC are presented.
Citations
Moro, D., Chiriotti, S., Colautti, P., & Conte, V. (2014). TEPC gas gain measurements in propane. Radiation Protection Dosimetry, 161(1-4), 459-463. https://doi.org/10.1093/rpd/ncu005 (Original work published 2014)