Zobrazeno 1 - 10
of 109
pro vyhledávání: '"M.D. Haworth"'
Publikováno v:
IEEE Transactions on Plasma Science. 40:3046-3051
A compact axial π-mode extraction scheme, which is based on a patent by Greenwood, is demonstrated in conjunction with the UM/L-3 relativistic magnetron using the particle-in-cell code ICEPIC. Cases utilizing Greenwood's extraction technique were co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b18ae86e39162ebf8650de6a51f33f91
https://doi.org/10.1109/tps.2012.2217758
https://doi.org/10.1109/tps.2012.2217758
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::810c1095930419fdd60d86ede6379345
https://doi.org/10.1109/tps.2008.926227
https://doi.org/10.1109/tps.2008.926227
Publikováno v:
Computing in Science & Engineering. 9:18-28
Shaped cathodes enhance key magnetron performance parameters, such as output power, power efficiency, and impedance. Simulations using these novel designs showed a dramatic increase in the range of magnetic field in which the magnetron functions, a d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57058013f7c109b500fbf86cd3fe06c4
https://doi.org/10.1109/mcse.2007.131
https://doi.org/10.1109/mcse.2007.131
Autor:
K.L. Cartwright, Trevor Strickler, M.D. Haworth, David Price, John Luginsland, David W. Jordan, Peter Mardahl, M. R. Lopez, V.B. Neculaes, Yue Ying Lau, W.M. White, M. C. Jones, Mark D. Johnston, Ronald M. Gilgenbach, T.A. Spencer
Publikováno v:
IEEE Transactions on Plasma Science. 32:1171-1180
Relativistic magnetron experiments performed on a six-cavity device have generated over 300 MW total microwave power near 1 GHz. These experiments were driven by the long-pulse electron beam from an accelerator with parameters as follows: voltage of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9df6a25d9cce2bdc1ac9682ba882f70b
https://doi.org/10.1109/tps.2004.828898
https://doi.org/10.1109/tps.2004.828898
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a245b5ac4b5ac11c6401657413707142
https://doi.org/10.1109/tps.2004.827608
https://doi.org/10.1109/tps.2004.827608
Autor:
D. Zagar, R. J. Umstattd, M. Ruebush, Matthew LaCour, Don Shiffler, M.D. Haworth, Ken Golby, T. Knowles
Publikováno v:
Review of Scientific Instruments. 73:4358-4362
Explosive field emission cathodes comprise an important class of cathodes for high power microwave tubes, having the advantages of light weight as well as requiring no heater for electron emission. Generally, however, this class of cathodes suffers f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4a76263ca51503361b354ae7e48f930
https://doi.org/10.1063/1.1516853
https://doi.org/10.1063/1.1516853
Autor:
M.D. Haworth, V. Bogdan Neculaes, M.D. Johnston, M.C. Jones, M.W. Keyser, John W. Luginsland, David Price, Ronald M. Gilgenbach, Yue Ying Lau, David W. Jordan, M.R. Lopez, Raymond W. Lemke, C.W. Peters, S.A. Anderson, T.A. Spencer, H. Miyake
Publikováno v:
IEEE Transactions on Plasma Science. 30:947-955
Experiments have been performed on a relativistic magnetron driven at e-beam accelerator peak parameters: voltage = -0.4 MV, current = 16 kA, and pulselength = 0.5 /spl mu/s. The magnetron is a six-vane device operating at about 1 GHz with extraction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0211c63709ca7279ee0f947733f3880
https://doi.org/10.1109/tps.2002.801543
https://doi.org/10.1109/tps.2002.801543
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e36e46a1ba4ce1b8df370ea954c73db3
https://doi.org/10.1109/tps.2002.802146
https://doi.org/10.1109/tps.2002.802146
Publikováno v:
IEEE Transactions on Plasma Science. 30:992-997
Recent experimental and computer simulation results on a magnetically insulated transmission line oscillator (MILO) have indicated that the large beam-current density emitted from each end of the cathode leads to anode plasma formation. This initiate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5692096bd5b5e3f3937b1b8123587990
https://doi.org/10.1109/tps.2002.801550
https://doi.org/10.1109/tps.2002.801550
Autor:
Kyle J. Hendricks, M.D. Haworth
Publikováno v:
IEEE Transactions on Plasma Science. 30:1215-1219
The ability to radiate the microwave pulse generated by a high-power microwave source can be limited by the interface from the vacuum to the ambient atmosphere. We report here on experiments that use geometric changes to control the tangential electr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec17d50db069b12142f43367b320e1b6
https://doi.org/10.1109/tps.2002.801654
https://doi.org/10.1109/tps.2002.801654