New mechanism of cluster-field evaporation in rf breakdown

Z. Insepov, J. H. Norem, A. Hassanein

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Using a simple field evaporation model and molecular dynamics simulations of nanoscale copper tip evolution in a high electric field gradient typical for linacs, we have studied a new mechanism for rf-field evaporation. The mechanism consists of simultaneous (collective) field evaporation of a large group of tip atoms in high-gradient fields. Thus, evaporation of large clusters is energetically more favorable when compared with the conventional, "one-by-one" mechanism. The studied mechanism could also be considered a new mechanism for the triggering of rf-vacuum breakdown. This paper discusses the mechanism and the experimental data available for electric field evaporation of field-emission microscopy tips.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalPhysical Review Special Topics - Accelerators and Beams
Volume7
Issue number12
DOIs
Publication statusPublished - Dec 1 2004

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces

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