Effect of the expanding explosive-emission centers plasma on the impedance of a high-current diode

Svyatoslav Ya Belomyttsev, Sergei D. Korovin, Igor V. Pegel

Research output: Contribution to journalArticle

22 Citations (Scopus)


Formulas for the space-charge-limited electron current in a planar diode with a small hemispherical or hemicylindrical plasma emitter have been obtained theoretically and by a numerical simulation. For a periodic cathode structure of hemispherical emitters, an approximate expression for current is derived. Based on these results, the increase in current with time in high-current explosive-emission diodes is explained. A condition has been found under which the expanding cathode plasma has no effect on the diode impedance. This is related to the electric field pressure on the cathode. A configuration of the cathode surface has been proposed which provides realization of this condition.

Original languageEnglish
Pages (from-to)1572-1577
Number of pages6
JournalIEEE Transactions on Plasma Science
Issue number6
Publication statusPublished - 1 Dec 1999
Externally publishedYes



  • Blade-type cathode
  • Cathode plasma expansion
  • Child-langmuir's law
  • Dexpanding hemispherical plasma emitter
  • Diode impedance
  • Diode perveance
  • Discontinuity of emission surface

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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