NDLI: Evidence for Fowler-Nordheim behavior in RF breakdown

Content Provider	IEEE Xplore Digital Library
Author	BastaniNejad, M. Elmustafa, A.A. Ankenbrandt, C.M. Moretti, A. Popovic, M. Yonehara, K. Kaplan, D.M. Alsharo'a, M. Hanlet, P.M. Johnson, R.P. Kuchnir, M. Newsham, D.
Copyright Year	2007
Description	Author affiliation: ODU, Norfolk (BastaniNejad, M.; Elmustafa, A.A.)
Abstract	Microscopic images of the surfaces of metallic electrodes used in high-pressure gas-filled 805 MHz RF cavity experiments are used to investigate the mechanism of RF breakdown. The images show evidence for melting and boiling in small regions of ~10 micron diameter on tungsten, molybdenum, and beryllium electrode surfaces. In these experiments, the dense hydrogen gas in the cavity prevents electrons or ions from being accelerated to high enough energy to participate in the breakdown process so that the only important variables are the fields and the metallic surfaces. The distributions of breakdown remnants on the electrode surfaces are compared to the maximum surface gradient E predicted by an ANSYS model of the cavity. The local surface density of spark remnants, proportional to the probability of breakdown, shows a power law dependence on the maximum gradient, with $E^{10}$ for tungsten, $E^{11.5}$ for molybdenum, and $E^{7}$ for beryllium. This strong E dependence is reminiscent of Fowler-Nordheim behaviour of electron emission from a cold cathode, which is explained by the quantum-mechanical penetration of a barrier that is characterized by the work function of the metal.
Starting Page	2499
Ending Page	2501
File Size	444594
Page Count	3
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4441296
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Electric breakdown Electrodes Tungsten Microscopy Hydrogen Electrons Acceleration Predictive models Sparks
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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