Zobrazeno 1 - 10
of 68
pro vyhledávání: '"D.T. Lopes"'
Publikováno v:
2018 IEEE International Vacuum Electronics Conference (IVEC).
This work presents some preliminary results of the design of a klystron amplifier to be used as the microwave power source for an electron linear microtron accelerator. The main specifications of the microwave klystron design are: 2450 MHz of central
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::642108bbe05beb6d8d1a7786cb9f488e
https://doi.org/10.1109/ivec.2018.8391494
https://doi.org/10.1109/ivec.2018.8391494
Akademický článek
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Autor:
D.T. Lopes, Claudio C. Motta
Publikováno v:
2016 IEEE International Vacuum Electronics Conference (IVEC).
This paper describes the first stages in the development of an interaction circuit for a 12 kW X-band pulsed traveling wave tube. Requirements suggest a coupled-cavity slow wave structure is the best choice due to power handling, ease of manufacturin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf227a3e54e7b8aa8bbe645fe138b308
https://doi.org/10.1109/ivec.2016.7561878
https://doi.org/10.1109/ivec.2016.7561878
Autor:
Claudio C. Motta, D.T. Lopes
Publikováno v:
2016 IEEE International Vacuum Electronics Conference (IVEC).
This paper focus on an issue that vacuum electronics engineers face while designing wide band slow-wave structures for traveling wave tubes: The obtaining of reasonably flat gain curve over the bandwidth. It is usual to try a tradeoff between synchro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c72e1da6fdb4a165db3d220625f7082e
https://doi.org/10.1109/ivec.2016.7561879
https://doi.org/10.1109/ivec.2016.7561879
Autor:
Claudio C. Motta, D.T. Lopes
Publikováno v:
Journal of Electrostatics. 70:166-173
We derive analytic formulae for the electrostatic force between ring and disc charge distributions inside a grounded metallic pipe using the Green’s function technique. These distribution models are useful in the modeling of electron beams commonly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2bec047f11d9c9c314061e77d222720
https://doi.org/10.1016/j.elstat.2011.12.006
https://doi.org/10.1016/j.elstat.2011.12.006
Publikováno v:
Revista Científica de Produção Animal. 12:162-165
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::727c327b3235af3ae619fa539bdc39fb
https://doi.org/10.15528/2176-4158/rcpa.v12n2p162-165
https://doi.org/10.15528/2176-4158/rcpa.v12n2p162-165
Autor:
Claudio C. Motta, D.T. Lopes
Publikováno v:
IEEE Transactions on Electron Devices. 55:2498-2504
In this paper, we present results from an extensive study concerning the phase velocity and the interaction impedance characteristics of slow-wave structures (SWSs) for high-power traveling-wave tubes (TWTs). The SWS under analysis is the ring-bar on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16d4aaef39aa9ebff6570bfa86ad2d4e
https://doi.org/10.1109/ted.2008.927804
https://doi.org/10.1109/ted.2008.927804
Akademický článek
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Publikováno v:
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011).
This paper presents the experimental results of R sh /Q 0 measurements in klystron cavities using the perturbation technique. The theory involving this technique results in an expression which depends on the natural frequency f 0 and the perturbed fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90db183633add294524a3608b8d20ac8
https://doi.org/10.1109/imoc.2011.6169312
https://doi.org/10.1109/imoc.2011.6169312
Publikováno v:
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011).
This paper presents some experimental results of unloaded Q-factor, Q 0 , measurements in klystron cavities using the critical points method. The circuit model and impedance locus involving this method are outlined in order to present the experimenta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2a65f9d75d4bf4f61e66ddb5d8dda5a
https://doi.org/10.1109/imoc.2011.6169401
https://doi.org/10.1109/imoc.2011.6169401