Journal ArticleDOI
High-Current Electron Beams for High-Power Free-Electron Masers Based on Two-Dimensional Periodic Lattices
Ivan Konoplev,P. MacInnes,Adrian W. Cross,L. Fisher,Alan D. R. Phelps,Wenlong He,Kevin Ronald,Colin G. Whyte,Craig Robertson +8 more
Reads0
Chats0
TLDR
In this article, the authors present the studies of high-current magnetically confined annular electron beams and discuss their production and transportation through a coaxial beam channel which formed the interaction region of a free-electron maser.Abstract:
High-power gigawatt-level radiation can be generated by the interaction of an electromagnetic wave and an annular electron beam with a transverse dimension much larger than the operating wavelength. The use of such a large-circumference annular beam allows the generation of high beam currents while also maintaining low space charge and RF power densities inside the interaction region. This circumvents the problems associated with potential depression in the beam channel and RF breakdown inside the oscillator. In this paper, we present the studies of high-current magnetically confined annular electron beams and discuss their production and transportation through a coaxial beam channel which formed the interaction region of a free-electron maser (FEM). The results from numerical simulations, using the software packages KARAT and MAGIC, are compared with the experimental measurements. The operation of a FEM, driven by a high-current annular electron beam, is presented, and the tunability of the maser, inside a frequency range defined by an input 2-D Bragg mirror, is demonstrated.read more
Citations
More filters
Journal ArticleDOI
Numerical Analysis of High-Power X-Band Sources, at Low Magnetic Confinement, for Use in a Multisource Array
P. MacInnes,Craig R. Donaldson,Colin G. Whyte,A. J. MacLachlan,Kevin Ronald,Alan D. R. Phelps,Adrian W. Cross +6 more
TL;DR: In this article , the authors presented the numerical analysis of a short-pulse (1.4kA) EH-band backward-wave oscillator driven by a 210-keV, 1.4-kA electron beam, suitable for use as the radiative element in an array.
Proceedings ArticleDOI
W-band two-dimensional periodic surface lattice for a surface field Cherenkov maser
Ivan Konoplev,A. R. Phipps,A. J. MacLachlan,Adrian W. Cross,Craig Robertson,A. R. Young,Alan D. R. Phelps +6 more
TL;DR: In this article, the design of an experiment to study a two-dimensional cylindrical lattice is presented, illustrated the mode transformations inside the set-up and discussed planned experiments with the lattice.
Proceedings ArticleDOI
A high-power Ka-band Free-Electron Maser, defined by a 2D – 1D Bragg lasing cavity
P. MacInnes,Ivan Konoplev,Adrian W. Cross,Wenlong He,H. Yin,Colin G. Whyte,Craig Robertson,Kevin Ronald,Alan D. R. Phelps +8 more
TL;DR: In this paper, the lasing cavity is defined using periodic corrugations on the drift-tube walls, whose reflection bands determine the dominant resonance of the maser, leading to monochromatic output at power levels of several tens of megawatts and pulse durations of ∼150ns (determined primarily by the pulse duration of the driving power supply of ∼250ns).
Proceedings ArticleDOI
A high-energy pulsed-power supply for high-power microwave sources
P. MacInnes,Adrian W. Cross,Ivan Konoplev,Colin G. Whyte,Wenlong He,H. Yin,Kevin Ronald,Craig Robertson,A. R. Young,Alan D. R. Phelps +9 more
TL;DR: A range of pulsed microwave sources, under investigation at the University of Strathclyde, require the generation of multi-kilo-ampere, relativistic, electron beams1,2 as discussed by the authors.
Special issue on plenary and invited papers from icops 2009
S. P. Obenschain,Andrew J. Schmitt,J.L. Weaver,Matthew F. Wolford,Frank Hegeler,Moshe Friedman,A.E. Robson,Andy J. Bayramian,J. Caird,C. Ebbers,J F Latkowski,W.J. Hogan,Wayne R. Meier,L.J. Perkins,Kathleen I. Schaffers,S. Abdel Kahlik,K. Schoonover,Dennis L. Sadowski,K.-J. Boehm,Lane Carlson,J. Pulsifer,Farrokh Najmabadi,A.R. Raffray,Mark S. Tillack,Gerald L. Kulcinski,Thad Heltemes,Ahmad M. Ibrahim,E. Marriott,Gregory A. Moses,R. Radell,Mohamed E. Sawan,John F. Santarius,G. Sviatoslavsky,S. Zenobia,Nasr M. Ghoniem,Shahram Sharafat,Jaafar A. El-Awady,Q. Hu,Chad E. Duty,Keith J. Leonard,G. Romanoski,Lance Lewis Snead,Steven J. Zinkle,C. Gentile,W. Parsells,T. Kozub,T. Dodson,D. V. Rose,Timothy J. Renk,Craig L. Olson,Neil Alexander,A. Bozek,G.W. Flint,D.T. Goodin,J. Hund,R. Paguio,R.W. Petzoldt,Diana Grace Schroen,John D. Sheliak,T. Bernat,D. Bittner,John J. Karnes,Nicole Petta,J.E. Streit,Drew Geller,James K. Hoffer,M. W. McGeoch,S C. Glidden,H. Sanders,D. Weidenheimer,D. Morton,I. D. Smith +71 more
References
More filters
Journal ArticleDOI
Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave generationa)
TL;DR: In this article, the contemporary plasma physics and other related issues of compact, high power mmw-to-THz sources are compared and contrasted to those of classic HPM generation, and future research challenges and opportunities are discussed.
Journal ArticleDOI
FEL's with Bragg reflection resonators: Cyclotron autoresonance masers versus ubitrons
TL;DR: In this paper, the authors compared the performance of cyclotron autoresonance masers (CARM's) and ubitrons at mm and sbmm waves.
Journal ArticleDOI
Pulsed Orotron - A new microwave source for submillimeter pulse high-field electron paramagnetic resonance spectroscopy
Yu.A. Grishin,Martin Fuchs,Alexander Schnegg,A. A. Dubinskii,B.S. Dumesh,F.S. Rusin,V. L. Bratman,Klaus Möbius +7 more
TL;DR: In this article, a vacuum tube device for the generation of pulsed microwave radiation in the submillimeter range (up to 380 GHz) is presented, designed for use as a source in a 360 GHz high-field/high-frequency electron paramagnetic resonance (EPR) spectrometer.
Journal ArticleDOI
Wave transformation in a multimode waveguide with corrugated walls
Journal ArticleDOI
Demonstration of a 17-GHz, high-gradient accelerator with a photonic-band-gap structure.
TL;DR: The testing of a high gradient electron accelerator with a photonic-band-gap structure, designed as a triangular lattice of metal rods with a missing central rod forming a defect confining the TM(01)-like mode and allowing the electron beam to propagate along the axis, in excellent agreement with theory.