NDLI: Effects of CsI Coating of Carbon Fiber Cathodes on the Microwave Emission From a Triode Virtual Cathode Oscillator

Content Provider	IEEE Xplore Digital Library
Author	Limin Li Lie Liu Jianchun Wen Yonggui Liu
Copyright Year	1973
Abstract	We discuss the effects of cesium iodide (CsI) coating of carbon fiber cathodes on the microwave emission from a triode virtual cathode oscillator. As compared with the uncoated cathode, the CsI-coated carbon fiber cathode significantly improved the diode performance and, most notably, lengthened the microwave pulse, from 150 to 200 ns. The light emission from the diode, the diode perveance, and the diode gap change were introduced to explain the observed extension of microwave pulse. After CsI coating, the carbon fiber cathode exhibited the absence of strong plasma, a slow plasma expansion velocity, and an almost unchanged diode gap during the main voltage pulse. It was found that heavy plasma ions, slow plasma expansion velocities, and long microwave pulses tend to be closely tied. These results show that, given a proper diode design, the carbon fiber cathodes with CsI coating have great promise for generating long-pulse microwave radiation.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	15
Ending Page	22
Page Count	8
File Size	694950
File Format	PDF
ISSN	00933813
Volume Number	37
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cathodes Coatings Carbon dioxide Microwave oscillators Diodes High power microwave generation Plasma sources Microwave generation Electron emission Electron beams vacuum electronics Cold cathodes electron guns high-power microwave (HPM) sources
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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Conditioning of Carbon Fiber Cathodes in UHV-Sealed Tubes at 200 A/cm²

Output Characteristics of the Axially Extracted Virtual Cathode Oscillator With a Cathode-Wing

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Effects of CsI Coating of Carbon Fiber Cathodes on the Microwave Emission From a Triode Virtual Cathode Oscillator

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