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Proceedings Paper

Liquid-metal surface under the artificial stimulation of microcapillary waves
Author(s): A. L. Kovalev; Lev M. Baskin; G. N. Fursey; Lenonid A. Shirochin
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Paper Abstract

It is evident now that the internal mechanism of explosive electron emission and vacuum discharges is determined to a considerable extent by the dynamics of tion of the liquid phase at the cathode surface. The liquid phase is always present, if only on the individual sections of solid cathode, in every type of high voltage vacuum discharge. What is nkre, it presence is fixed actually even on carbon cathodes, although the formation of the liquid phase on it is fundamentally inhibited, since at normal pressures carbon sublis by passing the iilting stage1 The interaction between the external fields and the liquid surface of the emitter leads to the ergency of different types of hydrodynamic instabilities. As a result, the surface iuicrostructures of different types are formed2. The character diinsions of structures produced have the values which provides for the creation of the fields required for the emission sustaining. As our experiments show2, the development of such instability in super-high frequency (SHF) fields results in a capillary wave swing, that, even with relatively low SHF-field strengths, may cause both field electron and field ion emission3. In this case, the high degree of reproducibility of small- scale irregularities of the microrelief of a liquid surface is, in our opinion, the reason such emitters are highly stable.

Paper Details

Date Published: 1 May 1994
PDF: 3 pages
Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174566
Show Author Affiliations
A. L. Kovalev, St. Petersburg Bonch-Bruevich Telecommunications Univ. (Russia)
Lev M. Baskin, St. Petersburg Bonch-Bruevich Telecommunications Univ. (Russia)
G. N. Fursey, St. Petersburg Bonch-Bruevich Telecommunications Univ. (Russia)
Lenonid A. Shirochin, St. Petersburg Bonch-Bruevich Telecommunications Univ. (Russia)


Published in SPIE Proceedings Vol. 2259:
XVI International Symposium on Discharges and Electrical Insulation in Vacuum

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