Generation of super-short avalanche electron beams in SF6

Cheng Zhang, Victor F. Tarasenko, Tao Shao, Dmitry V. Beloplotov, Mikhail I. Lomaev, Dmitry A. Sorokin, Ping Yan

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24 Citations (Scopus)

Abstract

In this work, the generation of a super-short avalanche electron beam (SAEB) in SF6 in an inhomogeneous electric field is studied on two generators with pulse rise times of 0.5 and 2 ns, respectively. The SAEB parameters in SF6 are compared with those obtained in other gases (air, nitrogen, argon, and krypton). It is shown that the SAEB amplitude in SF6 at pressures ranging from 0.05 to 0.2 MPa is commensurable with that in krypton and is much lower than that in air and nitrogen. It is also found that in SF6, SF6 mixture with 2.5% of nitrogen, and other gases, a diffuse discharge is ignited not only at negative polarity but also at positive polarity of the electrode with small curvature radius. Furthermore, the velocity of the ionization wave front in SF6 in an inhomogeneous electric field is studied. Experimental results show that the velocity of the ionization wave front in SF6 is lower than that in air and nitrogen as well as such velocity decreases when the pressure increases from 0.05 to 0.3 MPa in all gases.

Original languageEnglish
Pages (from-to)331-341
Number of pages11
JournalLaser and Particle Beams
Volume32
Issue number2
DOIs
Publication statusPublished - 28 Jan 2014
Externally publishedYes

Keywords

  • Nanosecond pulse
  • Runaway electrons
  • Super-short avalanche electron beam
  • Velocity of the ionization wave front

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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  • Cite this

    Zhang, C., Tarasenko, V. F., Shao, T., Beloplotov, D. V., Lomaev, M. I., Sorokin, D. A., & Yan, P. (2014). Generation of super-short avalanche electron beams in SF6. Laser and Particle Beams, 32(2), 331-341. https://doi.org/10.1017/S0263034614000147