Zobrazeno 1 - 10
of 55
pro vyhledávání: '"K. Golby"'
Autor:
Matteo Pasquali, N.P. Lockwood, Wilkin Tang, K. Golby, M. LaCour, Don Shiffler, Steven B. Fairchild, Benji Maruyama
Publikováno v:
IEEE Transactions on Plasma Science. 40:1871-1877
Field emission dc cold cathodes continue as an important area of research for uses such as electron microscopy, novel X-ray sources, vacuum electronic devices, terahertz sources, and high-power microwave tubes. Each of these applications typically re
Autor:
R. Umstattd, D. Shiffler, Susan Heidger, M. LaCour, M. Ruebush, Keith Cartwright, P. Duselis, M.D. Haworth, K. Golby, D. Sullivan, John W. Luginsland
Publikováno v:
IEEE Transactions on Plasma Science. 36:718-728
Over the last decade, the Air Force Research Laboratory, Directed Energy Directorate (AFRL/DE) has engaged in a high current density field emission cathode research program. This program explored the aspects of cathode materials as well as the detail
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 23:470-474
Anode thermal response is important in determining the operation of repetitively pulsed electron diodes and the systems using them. Thermal response determines desorption, cooling requirements, and power deposition. This article describes experimenta
Autor:
M. Ruebush, M.D. Haworth, M. LaCour, Don Shiffler, K.L. Cartwright, Thomas A. Spencer, K. Golby, John W. Luginsland
Publikováno v:
IEEE Transactions on Plasma Science. 32:1262-1266
High-power microwave tubes require currents and voltages generally in excess of 1 kA and 100 kV. In the past, these system requirements led to the use of single shot machines, with repetition rates well under 1 Hz. With advances in pulsed power, the
Publikováno v:
Physics of Plasmas. 11:1680-1684
Field emission cathodes have been a subject of research for many years. These cathodes hold the promise of effective electron emission in the absence of a heater. Such devices find application in the high power microwave (HPM) arena, as well as the c
Autor:
M. Ruebush, M.D. Haworth, D. Zagar, A. Gibbs, A. LaCour, John W. Luginsland, R. Umstattd, T.A. Spencer, K. Golby, Don Shiffler
Publikováno v:
IEEE Transactions on Plasma Science. 30:1232-1237
Explosive field-emission cathodes have been the electron emitter of choice, and often necessity, for high-power microwave (HPM) tubes for many years. The materials typically used for these cathodes range from polymer and cotton velvets, to metals suc
Publikováno v:
IEEE Transactions on Plasma Science. 32:2152-2154
Carbon nanotubes (CNTs) have attracted great attention as electron emitters. These field emission cathodes operate at room temperature without a heater, in contrast to thermionic emitters that often require considerable heater power for proper operat
Publikováno v:
Applied Physics Letters. 83:428-430
Explosive field emission cathodes constitute an important class of cathodes for high power microwave tubes. These cathodes have the advantages of being light weight and the capability of operating cold. In the past, this class of cathodes suffered fr
Publikováno v:
IVEC 2012.
Experiments and simulations were performed to investigate the electric field screening effects with two and four cathodes configuration. The experiments are run using carbon fiber field emitters with various spacing between fibers. Experiments and si
Publikováno v:
IEEE Transactions on Plasma Science. 42:2580-2581
Electric field screening caused by the proximity of individual field emitters in a field emitter array influences the current that can be obtained. This paper describes the image with four carbon fiber field emitters at a 500 μm separation in a line