Study of Breakdown/arcing for High Power RF Antennas on Fusion Applications
Castano, Carlos Henry
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Permalink
https://hdl.handle.net/2142/85907
Description
Title
Study of Breakdown/arcing for High Power RF Antennas on Fusion Applications
Author(s)
Castano, Carlos Henry
Issue Date
2006
Doctoral Committee Chair(s)
Ruzic, David N.
Department of Study
Nuclear Engineering
Discipline
Nuclear Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Nuclear
Language
eng
Abstract
CCl4 and XeF2 were used as sources of halogen ions to take advantage of the ion bombardment for breakdown amelioration by modification of the electrodes. It was found that CCl4 stabilizes the emission current but increases the enhancement factor of copper electrodes. XeF 2 exhibits a self-extinguishing emission current behavior on copper and tungsten electrodes, which allows the electrodes to achieve higher hold-off voltages. To reveal the mechanism by which chemicals modify field emitters on high voltage electrodes a different system with ultra high vacuum, and in-situ diagnostics is required. Further study is recommended.
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