Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Claudio C. Motta"'
Publikováno v:
2021 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
An analytical formulation of a multi-kilowatt ytterbium-doped double-cladding tandem-pumped fiber amplifier was developed and is reported in this paper. The model consists of a system including the laser rate, pumping and seed power equations. The mo
Publikováno v:
2021 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
An analytical formulation and modeling of an optical fiber Bragg gratings has been developed and is reported in this paper. Supported by the coupled-mode theory and considering that the mode fields of the unperturbed waveguide remain unchanged in the
Publikováno v:
2021 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
An analytical investigation of the refractive index behavior of an ytterbium-doped optical fiber silica glass as a function of the core-clad temperature, upper-level population laser density, and pumping signal intensity is presented in this paper. F
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
Autor:
Claudio C. Motta
Publikováno v:
2017 Eighteenth International Vacuum Electronics Conference (IVEC).
This work presents some preliminary results of the design of a klystron amplifier to be used as RF power source of a radio-frequency quadrupole for a proton linac accelerator. The main goals of the RF klystron design are: 358 MHz of central frequency
Autor:
Claudio C. Motta, Frank F. Sene
Publikováno v:
Materials Research, Vol 16, Iss 2, Pp 417-423 (2013)
Materials Research v.16 n.2 2013
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Volume: 16, Issue: 2, Pages: 417-423, Published: 08 FEB 2013
Materials Research v.16 n.2 2013
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Volume: 16, Issue: 2, Pages: 417-423, Published: 08 FEB 2013
A brazing process based on Ni-Mo alloy was developed to join porous tungsten cathode bottom and dense molybdenum cathode body for microwave tubes manufacture. The Ni-Mo alloy was obtained by mixing and milling powders in the eutectic composition, and
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
Publikováno v:
2016 IEEE International Vacuum Electronics Conference (IVEC).
In this work the design of a multiple-beam reentrant cavity with 6 beam tunnels for a 1.3 GHz klystron is presented. This cavity can be useful for a proton linac klystron including spallation neutron source applications. The study was carried out usi
Autor:
Claudio C. Motta
Publikováno v:
2016 IEEE International Vacuum Electronics Conference (IVEC).
In this paper an experimental apparatus for impregnated dispenser cathode Auger spectroscopy is described. The apparatus consists of three ultra-high vacuum chambers, all connected by 6 inches gate valves. In the first vacuum chamber the cathode unde
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