Gamma-ray detector based on high pressure xenon for radiation and environmental safety

• Дата: 2017
• Автори: Kutny, V.E., Rybka, A.V., Davydov, L.N., Pudov, A.O., Sokolov, S.A., Kholomeyev, G.A., Melnikov, S.I., Turchin, A.A.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2017
• Назва видання: Вопросы атомной науки и техники
• Теми: Проблемы современной ядерной энергетики
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/136019
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Gamma-ray detector based on high pressure xenon for radiation and environmental safety / V.E. Kutny, A.V. Rybka, L.N. Davydov, A.O. Pudov, S.A. Sokolov, G.A. Kholomeyev, S.I. Melnikov, A.A. Turchin // Вопросы атомной науки и техники. — 2017. — № 2. — С. 103-108. — Бібліогр.: 13 назв. — англ.

Gamma-spectrometers based on compressed xenon gas assigned for monitoring the reactors and the radiation background at nuclear power plants, non-proliferation of radioactive materials, supervision and control over the radiation background in the environmentally disadvantaged areas, and other applications, are very promising detectors with excellent performance characteristics. This article reports on the results of the first stage of work on the creation of the portable γ-spectrometer based on compressed xenon that is unique for Ukraine. In order to work with ultra-pure gases under pressure, the complex cryogenic installation for Xe purification and detector filling was designed and manufactured. The installation was made of specially cleaned components, equipped with a heating system for the degassing of the inner walls, and is able of maintaining high vacuum down to 2∙10⁻⁹ mbar. A prototype ionization chamber for the use in portable HPXe detectors was developed and made. For the detector testing, a spectrometric channel based on high-quality electronic components was designed and manufactured. In the initial experiments, a study of the properties of the purified Xe mixed with the dopant H₂ was carried out. The assessment of the lifetime of charge carriers τ in the working gas at a pressure of 30 bar gave the value of τ > 150 μs.