Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes
DOWNLOAD
Download Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes
DOWNLOAD
Author : Peter Ramins
language : en
Publisher:
Release Date : 1989
Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes written by Peter Ramins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Electrodes, Carbon categories.
A small, isotropic graphite electrode, multistage depressed collector (MDC) was designed, fabricated, and evaluated in conjunction with a 500-W, continuous wave (CW), 4.8- to 9.6-GHz traveling wave tube (TWT). The carbon electrode surfaces were used to improve the TWT overall efficiency by minimizing the secondary electron emission losses in the MDC. The design and fabrication of the brazed graphite MDC assembly are described. The brazing technique, which used copper braze filler metal, is compatible with both vacuum and the more commonly available hydrogen atmosphere brazing furnaces. The TWT and graphite electrode MDC bakeout, processing, and outgassing characteristics were evaluated and found to be comparable to TWT's equipped with copper electrode MDC's. The TWT and MDC performance was optimized for broadband CW operation at saturation. The average radiofrequency (RF), overall, and MDC efficiencies were 14.9, 46.4, and 83.6 percent, respectively, across the octave operating band. A 1500-hr CW test, conducted without the use of an appendage ion pump, showed no gas buildup and excellent stability of the electrode surfaces.
Nasa Technical Paper
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1989
Nasa Technical Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Astronautics categories.
Nasa Scientific And Technical Publications
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1991
Nasa Scientific And Technical Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Aeronautics categories.
Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes
DOWNLOAD
Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-12-31
Design Fabrication And Performance Of Brazed Graphite Electrode Multistage Depressed Collectors With 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tubes written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-31 with categories.
A small, isotropic graphite electrode, multistage depressed collector (MDC) was designed, fabricated, and evaluated in conjunction with a 500-W, continuous wave (CW), 4.8- to 9.6-GHz traveling-wave tube (TWT). The carbon electrode surfaces were used to improve the TWT overall efficiency by minimizing the secondary electron emission losses in the MDC. The design and fabrication of the brazed graphite MDC assembly are described. The brazing technique, which used copper braze filler metal, is compatible with both vacuum and the more commonly available hydrogen atmosphere brazing furnaces. The TWT and graphite electrode MCC bakeout, processing, and outgassing characteristics were evaluated and found to be comparable to TWT's equipped with copper electrode MDC's. The TWT and MDC performance was optimized for broadband CW operation at saturation. The average radiofrequency (RF), overall, and MDC efficiencies were 14.9, 46.4, and 83.6 percent, respectively, across the octave operating band. A 1500-hr CW test, conducted without the use of an appendage ion pump, showed no gas buildup and excellent stability of the electrode surfaces. Ramins, Peter and Ebihara, Ben Glenn Research Center NASA-TP-2904, E-4361, NAS 1.60:2904 RTOP 506-44-21...
Nasa Sp
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1962
Nasa Sp written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Aeronautics categories.
Nasa Scientific And Technical Publications
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1989
Nasa Scientific And Technical Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Aeronautics categories.
Government Reports Annual Index
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 199?
Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 199? with categories.
Electrical Electronics Abstracts
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1988
Electrical Electronics Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Electrical engineering categories.
Government Reports Announcements Index
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1989-09
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989-09 with Science categories.
Performance Of A Small Graphite Electrode Multistage Depressed Collector With A 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tube
DOWNLOAD
Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-12-28
Performance Of A Small Graphite Electrode Multistage Depressed Collector With A 500 W Continuous Wave 4 8 To 9 6 Ghz Traveling Wave Tube written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-28 with Science categories.
A small, isotropic graphite multistage depressed collector (MDC) and a short permanent magnet refocuser were designed, fabricated, and evaluated in conjunction with a 500-W, continuous-wave (CW), 4.8 to 9.6 GHz traveling wave tube (TWT). A novel performance optimization system and technique were used to optimize the TWT-MDC performance for saturated broad-band operation. The MDC performance was evaluated in both four- and three-stage configurations. Average TWT overall and four-stage collector efficiencies of 43.8 and 82.6 percent, respectively, were obtained for saturated octave-bandwidth operation. The isotropic graphite electrode material performed well, and shows considerable promise. However, considerably more test experience is required before definitive conclusions on its suitability for space and airborne TWT's can be made. Ramins, Peter and Lesny, Gary G. and Ebihara, Ben T. and Peet, Shelly Glenn Research Center NASA-TP-2788, E-3800, NAS 1.60:2788 RTOP 506-44-21...