Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Steve Schwartzkopf"'
Autor:
David Marsden, R. Lawrence Ives, Lou Falce, A. Malygin, George Collins, Daniel Busbaher, Michael Read, Steve Schwartzkopf
Publikováno v:
IEEE International Vacuum Electronics Conference.
Efforts are continuing to improve the quality of controlled porosity reservoir cathodes and measure performance. CPR cathodes are being incorporated into several new configurations, including a magnetron injection gun, 15-beam klystron, 18-beam klyst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69ab971b998bab9048a39d1ad39dbca8
https://doi.org/10.1109/ivec.2014.6857540
https://doi.org/10.1109/ivec.2014.6857540
Autor:
Michael Effgen, Michael Read, David Marsden, Lou Falce, Steve Schwartzkopf, Philipp Borchard, A. Malygin, George Collins, Daniel Busbaher, R. Lawrence Ives
Publikováno v:
2013 IEEE 14th International Vacuum Electronics Conference (IVEC).
Efforts are continuing to improve the quality of controlled porosity reservoir cathodes and measure performance. CPR cathodes are being incorporated into several new configurations, including a magnetron injection gun, 15-beam klystron, and a Pierce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08afff0a1f22d7bf9552c9f1908c66e1
https://doi.org/10.1109/ivec.2013.6571041
https://doi.org/10.1109/ivec.2013.6571041
Autor:
George Collins, G. Miram, David Marsden, Louis R. Falce, Bryan Smith, Steve Schwartzkopf, R. Lawrence Ives
Publikováno v:
35th International Conference on Infrared, Millimeter, and Terahertz Waves.
Sintered tungsten wire, reservoir cathodes offer high current density operation with very long life time. The diffusion rate can be selected consistent with the current emission density. This presentation will describe the impact of this technology a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e079e0c20169bd83a8ab9c66c8917468
https://doi.org/10.1109/icimw.2010.5613042
https://doi.org/10.1109/icimw.2010.5613042
Autor:
George Collins, Steve Schwartzkopf, R. Lawrence Ives, David Marsden, G. Miram, Louis R. Falce, Bryan Smith
Publikováno v:
2010 IEEE International Vacuum Electronics Conference (IVEC).
Sintered tungsten wire reservoir cathodes offer the promise of high current density operation with very long life time. The fabrication technique provides controlled porosity for diffusion of barium and oxygen to the emission surface to reduce the wo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d8a739d985a37c857fc0a91c90703d1
https://doi.org/10.1109/ivelec.2010.5503597
https://doi.org/10.1109/ivelec.2010.5503597
Autor:
Louis R. Falce, Ron Witherspoon, George Collins, David Marsden, G. Miram, Bryan Smith, R. Lawrence Ives, Steve Schwartzkopf
Publikováno v:
2009 34th International Conference on Infrared, Millimeter, and Terahertz Waves.
Sintered tungsten wire cathodes offer the promise of high current density operation with very long life time. The fabrication technique provides controlled porosity for diffusion of barium and oxygen to the emission surface for work function reductio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcb33cbce9d5722e37e1ed90d2f29787
https://doi.org/10.1109/icimw.2009.5324740
https://doi.org/10.1109/icimw.2009.5324740
Autor:
Steve Schwartzkopf, David Marsden, Lou Lawrence Ives, Ron Witherspoon, Bryan Smith, George Collins Falce, K. Gunther, G. Miram, Marc Curtis
Publikováno v:
2009 IEEE International Vacuum Electronics Conference.
Research is continuing on development of controlled porosity cathodes capable of very long life times. Tungsten wires are sintered to form a material consisting of a uniform pattern of pores to transport barium from a reservoir. The combination of un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ba0ab9ad7fbcb68652cb0bb74637b5e
https://doi.org/10.1109/ivelec.2009.5193464
https://doi.org/10.1109/ivelec.2009.5193464
Autor:
K. Gunther, Louis R. Falce, M. Curtis, G. Miram, Robert Lawrence Ives, Steve Schwartzkopf, George Collins
Publikováno v:
2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves.
Long life, high current density cathodes are required of several THz RF sources. Conventional porous tungsten cathodes are limited to current densities less than 10 A/cm2 for reasonable lifetimes. This presentation describes research to develop long
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aafd1d92884f21d750b16be0605c8225
https://doi.org/10.1109/icimw.2008.4665465
https://doi.org/10.1109/icimw.2008.4665465
Autor:
Steve Schwartzkopf, Lawrence Ives, G. Miram, K. Gunther, Louis R. Falce, Ron Witherspoon, Marc Curtis
Publikováno v:
2007 IEEE International Vacuum Electronics Conference.
At IVEC 2006, Calabazas Creek Research, Inc. (CCR) reported on a novel technique to fabricate controlled porosity cathodes. In this process, 20 micron diameter tungsten wires are bundled and sintered to create a porous structure where the pores penet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c542ae9caa075af35f84dd807057b245
https://doi.org/10.1109/ivelec.2007.4283272
https://doi.org/10.1109/ivelec.2007.4283272
Autor:
M. Caplan, R. Wilcox, David Marsden, T. Robinson, Ron Witherspoon, Carol L. Kory, Lawrence Ives, J. Neilson, Steve Schwartzkopf
Publikováno v:
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004..
Terahertz backward wave oscillators (BWOs) are needed for spectroscopy applications from astrophysics to chemical and biological agent detection. A 600-700 GHz BWO is nearing completion that includes a depressed collector and high purity, quasi-optic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ecf56107a4efe840a48c9473964fa26
https://doi.org/10.1109/icimw.2004.1422272
https://doi.org/10.1109/icimw.2004.1422272
Autor:
Carol L. Kory, Ron Witherspoon, T. Robinson, M. Caplan, M.E. Read, Steve Schwartzkopf, J. Neilson, R. Wilcox, Lawrence Ives
Publikováno v:
2006 IEEE International Vacuum Electronics Conference held Jointly with 2006 IEEE International Vacuum Electron Sources.
A 600-700 GHz backward wave oscillator is under development for the National Aeronautics and Space Administration for molecular spectroscopy. Previous tests identified problems with the cathode and magnetics circuit, which were corrected in the most
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3aa2f17b62ee20468f60cda617fd4b22
https://doi.org/10.1109/ivelec.2006.1666365
https://doi.org/10.1109/ivelec.2006.1666365