Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Richard Donald Kowalczyk"'
Autor:
Jinchi Cai, Jeff Neilson, Aaron Jensen, Richard Donald Kowalczyk, Valery Dolgashev, Igor Syratchev, Brandon Weatherford
Publikováno v:
2018 IEEE International Vacuum Electronics Conference (IVEC).
Results are reported from an exploratory study of high efficiency X-band klystron designs. A variety of simulation tools are used to determine the peak achievable efficiency as a function of beam and circuit parameters. The core oscillation method is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bfc2a2b74e09da296f8e367de5557f8
https://doi.org/10.1109/ivec.2018.8391533
https://doi.org/10.1109/ivec.2018.8391533
Autor:
Holger Schult, Andrew Zubyk, Brandon Weatherford, L. Turek, Richard Donald Kowalczyk, Mark Frederick Kirshner, Ann Sy, Michael Boyle
Publikováno v:
2017 Eighteenth International Vacuum Electronics Conference (IVEC).
L-3 Electron Devices has successfully completed factory testing of the L6200 1.2 MW Multi-Beam Inductive Output Tube (MBIOT) for the European Spallation Source. The ten-beam, permanent magnet-focused device meets the maximum 1.2 MW output power speci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65ccb5e38fdae8ca14d058dfc26c05a0
https://doi.org/10.1109/ivec.2017.8289652
https://doi.org/10.1109/ivec.2017.8289652
Autor:
Thomas Habermann, Mark A. Kemp, P. Kolda, B. Stockwell, Stephan Lenci, Andy Haase, A. Shabazian, Aaron Jensen, Richard Donald Kowalczyk, Erik Jongewaard
Publikováno v:
2017 Eighteenth International Vacuum Electronics Conference (IVEC).
Design of a beam energy recovery system for application to the CPI VKS-8262S S-band klystron is presented. The multi stage pulsed depressed collector optics, mechanical and thermal design, energy recovery modulator, and experimental program will be h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::276ecf44cd539bd312348e355ac4663d
https://doi.org/10.1109/ivec.2017.8289688
https://doi.org/10.1109/ivec.2017.8289688
Autor:
Craig Bisset Wilsen, L. Turek, Vasilios Vlahos, Mark Frederick Kirshner, John H. Booske, Richard Donald Kowalczyk, Dane Morgan
Publikováno v:
2008 IEEE International Vacuum Electronics Conference.
To obtain a fundamental understanding of the surface processes responsible for the superior emission characteristics of scandate cathodes, a first principles investigation was carried out using the Vienna ab-initio simulation package (VASP) [G. Kress
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d422f5053b6e4cc063a36cccd7e4a09d
https://doi.org/10.1109/ivelec.2008.4556421
https://doi.org/10.1109/ivelec.2008.4556421
Publikováno v:
2007 IEEE International Vacuum Electronics Conference.
Emission gated microwave amplifiers, such as the inductive output tube (IOT), use density modulation to establish an AC current on the electron beam directly at the cathode surface. These amplifiers are compact and highly efficient, even in the linea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2b0d31d31c90a4eb4d2f628ed4847ec
https://doi.org/10.1109/ivelec.2007.4283367
https://doi.org/10.1109/ivelec.2007.4283367
Publikováno v:
2007 IEEE International Vacuum Electronics Conference.
Microwave vacuum tube amplifiers use either velocity or density modulation to establish an AC current in an electron beam which is subsequently converted to RF energy at the output of the device. VectorTM is a trajectory modulation amplifier.The Vect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57a2c66b11f66399d2343f471e295f5c
https://doi.org/10.1109/ivelec.2007.4283268
https://doi.org/10.1109/ivelec.2007.4283268
Autor:
R.J. Hansen, Richard Donald Kowalczyk, Richard True, Mark Frederick Kirshner, Craig Bisset Wilsen, L. Turek, D.R. Whaley
Publikováno v:
2006 IEEE International Vacuum Electronics Conference held Jointly with 2006 IEEE International Vacuum Electron Sources.
As part of our multi-beam development program, this paper describes the simulation and testing of a gridded gun beamstick, demonstrating off-axis Brillouin focusing of a single beam. The beam is situated off-axis to accommodate a six beamlet design.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89ad909cbd2a78d5e75f0088830bc2cf
https://doi.org/10.1109/ivelec.2006.1666176
https://doi.org/10.1109/ivelec.2006.1666176
Publikováno v:
2006 IEEE International Vacuum Electronics Conference held Jointly with 2006 IEEE International Vacuum Electron Sources.
Summary form only given. Reliable, high current density cathodes are an enabling technology for the development of vacuum tubes operating at higher frequencies, e.g. millimeter wave devices. High perveance amplifiers such as the multi-beam klystron (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38a0e010997969cbf87a571b6cca0216
https://doi.org/10.1109/ivelec.2006.1666283
https://doi.org/10.1109/ivelec.2006.1666283
Publikováno v:
2006 IEEE International Vacuum Electronics Conference held Jointly with 2006 IEEE International Vacuum Electron Sources.
Summary form only given. L-3 uses several advanced computational codes for design and analysis of klystron RF performance. This paper presents recent results from two of these: the large signal codes, TESLA and MAGIC 3D. TESLA, developed by the Naval
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7554671433d665e0b6a9d702a452b35
https://doi.org/10.1109/ivelec.2006.1666263
https://doi.org/10.1109/ivelec.2006.1666263
Publikováno v:
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786).
Summary form only given. Aluminum nitride (AlN) is a leading candidate for replacing BeO or high-purity alumina as an RF window material because of its good mechanical and electrical properties. However, forming a vacuum tight AlN-to-metal seal has,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9efa8ee35c126a97a6d9c27ba7f2ec3c
https://doi.org/10.1109/ivelec.2004.1316188
https://doi.org/10.1109/ivelec.2004.1316188