NDLI: Performance of textured carbon on copper electrode multistage depressed collectors with medium-power traveling wave tubes

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Performance of textured carbon on copper electrode multistage depressed collectors with medium-power traveling wave tubes

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ramins, Peter Curren, Arthur N.
Copyright Year	1986
Description	Performance of multistage depressed collectors (MDCs) using textured carbon on copper substrate electrode surfaces was evaluated in conjunction with medium-power traveling wave tubes (TWTs). The MDC and TWT overall efficiencies for these electrodes were measured and compared with those obtained with the same TWT and a copper electrode MDC of identical design. Long-term stability of the carbon-coated copper electrode surfaces was investigated by periodic evaluation of TWT-MDC performance over an extended period of continuous wave (CW) operation. Application of textured carbon coating on copper MDC electrode surfaces produced a 13% improvement in both MDC and TWT overall efficiencies for the TWT-MDC tests. During 1600 hr of CW operation with a medium power TWT, no significant changes in MDC performance were noted. This indicated good stability of the textured carbon electrode surfaces. This stability was confirmed by scanning electron microscope examinations of the electrode surfaces before assembly of the MDC and after completion of the test program.
File Size	3033330
Page Count	12
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870008557
Archival Resource Key	ark:/13960/t44r2s920
Language	English
Publisher Date	1986-11-01
Access Restriction	Open
Subject Keyword	Electronics And Electrical Engineering Electrodes Traveling Wave Tubes Surface Reactions Accumulators Electron Emission Copper Electron Microscopy Carbon Current Density Sputtering Substrates Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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