Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation

A. Pushkarev, Y. Isakova, V. Guselnikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The results of a study of the generation of a pulsed ion beam of gigawatt power formed by a diode with an explosive-emission potential electrode in a mode of magnetic self-insulation are presented. The studies were conducted at the TEMP-4M ion accelerator set in double pulse formation mode: the first pulse was negative (300-500 ns and 100-150 kV) and the second positive (150 ns, 250-300 kV). The ion current density was 20-40 A/cm 2; the beam composition was protons and carbon (70%) ions. It was shown that plasma is effectively formed over the entire working surface of the graphite potential electrode. During the ion beam generation a condition of magnetic cutoff of electrons along the entire length of the diode (B/B cr ≥ 4) is fulfilled. Because of the high drift rate the residence time of the electrons and protons in the anode-cathode gap is 3-5 ns, while for the C + ions it is more than 8 ns. This denotes low efficiency of magnetic self-insulation in a diode of such a design. At the same time it has been experimentally observed that during the generation of ion current (second pulse) the electronic component of the total current is suppressed by a factor of 1.5-2 for a strip diode with plane and focusing geometry. A new model of the effect of limiting the electron emission explaining the decrease in the electronic component of the total current in a diode with magnetic self-insulation is proposed.

Original languageEnglish
Title of host publicationDigest of Technical Papers-IEEE International Pulsed Power Conference
Pages881-887
Number of pages7
DOIs
Publication statusPublished - 2011
Event18th IEEE International Pulsed Power Conference, PPC 2011 - Chicago, IL, United States
Duration: 19 Jun 201123 Jun 2011

Other

Other18th IEEE International Pulsed Power Conference, PPC 2011
CountryUnited States
CityChicago, IL
Period19.6.1123.6.11

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Cite this

Pushkarev, A., Isakova, Y., & Guselnikov, V. (2011). Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation. In Digest of Technical Papers-IEEE International Pulsed Power Conference (pp. 881-887). [6191532] https://doi.org/10.1109/PPC.2011.6191532