RF power generation
Reads0
Chats0
TLDR
This paper reviews the main types of r.f. power amplifiers used for particle accelerators and concludes with a summary of the state of the art for the different technologies.Abstract:
This paper reviews the main types of r.f. power amplifiers which are, or may be, used for particle accelerators. It covers solid-state devices, tetrodes, inductive output tubes, klystrons, magnetrons, and gyrotrons with power outputs greater than 10 kW c.w. or 100 kW pulsed at frequencies from 50 MHz to 30 GHz. Factors affecting the satisfactory operation of amplifiers include cooling, matching and protection circuits are discussed. The paper concludes with a summary of the state of the art for the different technologies.read more
Citations
More filters
Journal ArticleDOI
Ammonia Synthesis by Radio Frequency Plasma Catalysis: Revealing the Underlying Mechanisms
TL;DR: In this article, metal meshes of Fe, Cu, Pd, Ag, and Au were employed as catalysts in radio frequency plasma for ammonia synthesis, with an energy yield of 0.22 g-NH3/kWh and a maximum yield of ∼10% at 150 W.
Dissertation
Cavity Field Control for Linear Particle Accelerators
TL;DR: This thesis demonstrates that a key to understand the dynamics of the field control loop is to represent it as a single-input single-output system with complex coefficients, and develops practical and theoretical tools for analysis and control design for complex-coefficient systems.
High power rf sources for the ess rf systems
Morten Jensen,Chiara Marrelli,Goran Goransson,Rutambhara Yogi,Anders J Johansson,Carlos Martins,Anders Sunesson,Rafael Montaño,Rihua Zeng +8 more
TL;DR: In this article, the authors present the preliminary design of a new 1.2 MW multi-beam super power IOT being designed together with industry for the high beta section of the linac.
Journal ArticleDOI
Modular 20 kW, 83.2-MHz Solid-State RF Amplifier for a 10-MeV Cyclotron
TL;DR: In this paper, the design and development of the modular 83.2-MHz, 20-kW solid-state-based radio frequency (RF) power amplifier, which will be used in a 10-MeV cyclotron (SKKUCY-10) under development, is described.
Journal ArticleDOI
Highly efficient, megawatt-class, radio frequency source for mobile ionospheric heaters
Brian Beaudoin,Gregory S. Nusinovich,G. M. Milikh,Antonio Ting,Steven H. Gold,Jayakrishnan A. Karakkad,Amith H. Narayan,David Matthew,Dennis Papadopoulos,Thomas M. Antonsen +9 more
TL;DR: In this article, the main features of a prototype MW-class vacuum electronics RF source for mobile ionospheric heaters are studied. But the work of our group on studying main features is limited to the design of the source.
References
More filters
Journal ArticleDOI
SiC and GaN transistors - is there one winner for microwave power applications?
TL;DR: Improvements in the growth of wide bandgap semiconductor materials, such as SiC and the GaN-based alloys, provide the opportunity to now design and fabricate microwave transistors that demonstrate performance previously available only from microwave tubes.
Journal ArticleDOI
The klystrode—An unusual transmitting tube with potential for UHF-TV
D.H. Preist,M.B. Shrader +1 more
TL;DR: In this article, the authors describe a very old and largely forgotten device which appears to hold great promise as a generator of tens to hundreds of kilowatts in the UHF range, with special advantages in TV service.
Journal ArticleDOI
Helically corrugated waveguide gyrotron traveling wave amplifier using a thermionic cathode electron gun
Adrian W. Cross,Wenlong He,Alan D. R. Phelps,Kevin Ronald,Colin G. Whyte,A. R. Young,Craig Robertson,E.G. Rafferty,J. Thomson +8 more
TL;DR: In this paper, an experimental operation of a gyrotron traveling wave amplifier with a helically corrugated waveguide using a thermionic cathode electron gun was presented, where the coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation occurred in the region of near infinite phase velocity over a broad frequency band.
Journal ArticleDOI
Diamond-based RF power transistors: Fundamentals and applications
TL;DR: The present status of diamond-based transistors for high-frequency and high-power applications is reviewed in this paper, where the authors have achieved the drain current density of 550 mA/mm, cut-off frequencies for current gain (f T ) and power gain ( f MAX ) of 45 GHz and 120 GHz, respectively, and output-power density of 2.1 W/mm at 1 GHz in class-A operation of a field-effect transistor (FET) with hydrogen (H)-surfaceterminated diamond.
Journal ArticleDOI
The Design and Performance of a 150-MW Klystron at S Band
TL;DR: In this paper, the design and performance characteristics of a 150MW pulsed klystron amplifier at the S band were described and a double-gap 2?mode output cavity was used to achieve a peak output power of 150 MW at a frequency of 2870 MHz with an efficiency of 51 percent, saturation gain of 59.3 dB, and a pulsewidth of 1?s.