Design and study of the characteristics of a versatile ionization chamber for gamma-ray dosimetry
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Design and study of the characteristics of a versatile ionization chamber for gamma‑ray dosimetry Mohamed Fares1 · Adnane Messai1 · Samir Begaa2 · Mohammed Messaoudi2 · Kassida Negara1 · Mohamed Yacine Debili3 Received: 5 June 2020 / Accepted: 3 October 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract This work present the experimental characteristics study of the versatile gamma ionization chamber that is designed, developed and distinguished in our laboratory. All tests were accomplished under the International Electro-technical Commission. The saturation current curves and the linearity were plotted by determining the operating range and the sensitivity of the chamber. The response is linear up to more than 10 Sv/h. The sensitivity of the experimentally measured chamber is 2.1 × 10−8 A per Sv/h at an argon gas pressure of 0.4 MPa. In the same conditions, a comparative characterization with a reference chamber LND504 (USA) was done. Keywords Ionization chamber · Flux gamma · Dose · Calibration · Sensitivity
Introduction In the field of nuclear technology, instruments and sensing devices occupy a very important place. Indeed, they are the fundamental part of the whole nuclear instrumentation used * Mohamed Fares [email protected] Adnane Messai [email protected] Samir Begaa [email protected] Mohammed Messaoudi [email protected] Kassida Negara [email protected] Mohamed Yacine Debili [email protected] 1
Laboratory of Nuclear Detectors, Department Detection and Measurement, Nuclear Research Centre of Birine, P.O. Box 180, 17200 Ain Oussera, Djelfa, Algeria
2
Neutron Activation Analysis Department, Nuclear Research Centre of Birine, P.O. Box 180, 17200 Ain Oussera, Djelfa, Algeria
3
LM2S, Physics Department, Faculty of Science, University of Badji Mokhtar - Annaba, P.O. Box. BP 12, 23000 Annaba, Algeria
in nuclear facilities, radiation protection and safety for the monitoring and control of nuclear power plants [1, 2]. The γ-rays, neutrons are a very dangerous source because they are highly penetrating, therefore around operational nuclear reactor, it is necessary to protect operators and working facilities near to prevent overexposure due to gamma radiation fields of neutrons and exceeding a certain threshold. Some types of nuclear detectors have been developed in our laboratory; among these devices, ionization chambers take a major importance. The ionization chamber for detecting gamma radiation including a closure, made of stainless steel and filled with argon at a pressure of about 0.4 MPa [3], two electrodes positioned within the enclosure, these two electrodes being electrically insulated and separated from one another by an insulation resistance of 1 015Ω order to create there between an electric field (E) and allowing the passage, by this electric field, of ionizing particles producing positive ions and electrons which can be collected via the cited electrodes [4]. Many applications of gamma ionization chambers in the control of nuclear reactors and radiation d
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