New mechanism of cluster-field evaporation in rf breakdown
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Date
2004
Authors
Insepov, Z.
Norem, J. H.
Hassanein, A.
Journal Title
Journal ISSN
Volume Title
Publisher
Physical Review Special Topics-Accelerators and Beams
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.
Description
Keywords
rf breakdown, rf, high-gradient field
Citation
Insepov, Z., Norem, J. H., & Hassanein, A. (2004). New mechanism of cluster-field evaporation in rf breakdown. Physical Review Special Topics-Accelerators and Beams, 7(12), 122001.