Supershort avalanche electron beam in SF6 and krypton

doi:10.1103/PhysRevAccelBeams.19.030402

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DOI Доступ к ресурсу на сайте издателя				10.1103/PhysRevAccelBeams.19.030402

Title: Supershort avalanche electron beam in SF6 and krypton
Creator: Zhang, Cheng
Creator: Gu, Jianwei
Creator: Baksht, Evgeni Kh.
Creator: Beloplotov, Dmitry V.
Creator: Burachenko, Alexander G.
Creator: Yan, Ping
Creator: Lomaev, Mikhail I.
Creator: Shao, Tao
Creator: Tarasenko, Viktor Fedotovich
Subject: убегающие электроны
наносекундные импульсные разряды
криптон
Date: 2016
DOI: 10.1103/PhysRevAccelBeams.19.030402
Description: Runaway electrons play an important role in the avalanche formation in nanosecond- and subnanosecond- pulse discharges. In this paper, characteristics of a supershort avalanche electron beam (SAEB) generated at the subnanosecond and nanosecond breakdown in sulfur hexafluoride (SF6 ) in an inhomogeneous electric field were studied. One pulser operated at negative polarity with voltage pulse amplitude of ˜130 kV and rise time of 0.3 ns. The other pulser operated at negative polarity with voltage pulse amplitude of 70 kV and rise time of ˜1.6 ns . SAEB parameters in SF6 are compared with those obtained in krypton (Kr), nitrogen (N2 ), air, and mixtures of SF6 with krypton or nitrogen. Experimental results showed that SAEB currents appeared during the rise-time of the voltage pulse for both pulsers. Moreover, amplitudes of the SAEB current in SF6 and Kr approximately ranged from several to tens of milliamps at atmospheric pressure, which were smaller than those in N2 and air (ranging from hundreds of milliamps to several amperes). Furthermore, the concentration of SF6 additive could significantly reduce the SAEB current in N2-SF6 mixture, but it slightly affected the SAEB current in Kr -SF6 mixture because of the atomic/molecular ionization cross section of the gas had a much greater impact on the SAEB current rather than the electronegativity.

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collection(s): Факультет инновационных технологий
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Identifier: vtls:000622815
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000622815
Type: статьи в журналах
Source: Physical review accelerators and beams. 2016. Vol. 19, № 3. P. 030402-1-030402-7
Language: eng

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Факультет инновационных технологий Supershort avalanche electron beam in SF6 and krypton