Journal ArticleDOI
Analysis of characteristics of a čerenkov laser via particle simulation
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TLDR
In this article, a Cerenkov laser composed of a parallel plate waveguide loaded with a dielectric sheet and a planar relativistic electron beam focused with infinite magnetostatic field was analyzed using particle simulation.Abstract:
Using a method for computer simulation, called particle simulation, this paper investigates in detail nonlinear characteristics (whose analytical treatment has been difficult to date) for a Cerenkov laser composed of a parallel plate waveguide loaded with a dielectric sheet and a planar relativistic electron beam focused with infinite magnetostatic field. The main results obtained here are summarized as follows. First, the growth of an electromagnetic wave is found to be due to energy transfer from the kinetic energy of an electron beam to the electromagnetic energy. Initially, the amplitude of an electromagnetic wave grows exponentially, and then nonlinearity gradually begins to dominate as electrons composing the electron beam are trapped in the electric field of the electromagnetic wave. In the final stage where most of the electrons are trapped, the amplitude of the electromagnetic wave gets saturated. In the early stage where the wave amplitude grows exponentially, the results obtained from particle simulation agree well with those obtained from linear analysis. In this paper, the efficiency of energy conversion from the electron beam to the electromagnetic wave is also estimated with the use of the energy carried by the electromagnetic wave at saturation.read more
Citations
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Journal ArticleDOI
Three-dimensional analysis of a Cherenkov laser via particle simulation
TL;DR: In this paper, the nonlinear properties and efficiency enhancement of a 3D Cherenkov laser with a dielectric-loaded rectangular waveguide and a finite-width planar relativistic electron beam were investigated with the aid of particle simulation.
Journal ArticleDOI
Effectiveness and limitation of the periodic boundary approximation in the analysis of single-pass electron beam devices
TL;DR: In this paper, the effectiveness and limitation of the periodic boundary condition (PBC) in the analysis of single-pass electron beam devices are discussed, and the upper bound for the growth rate is given for which the analysis with the PBC is valid.
Book ChapterDOI
FDTD Analysis of Beam-Wave Interaction
TL;DR: In this article, the authors describe a typical branch of computer simulation, called particle simulation, which treats resonant interactions between a collection of charged particles and electromagnetic waves in plasmas or electron beams.
References
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BookDOI
Plasma physics via computer simulation
TL;DR: In this article, the authors describe the theoretical effects of the spatial grid, energy-conserving simulation models, multipole models, and Kinetic theory for fluctuations and noise collisions.
Journal ArticleDOI
Generation of coherent Cerenkov radiation with an intense relativistic electron beam
TL;DR: In this article, theoretical predictions and preliminary experimental results for a microwave source consisting of a dielectric loaded waveguide and an intense relativistic electron beam are compared and compared.
Journal ArticleDOI
Cerenkov radiation in dielectric‐lined waveguides
TL;DR: In this article, a dielectric-lined waveguide was used with a relativistic electron beam to produce 1 kW of Cerenkov microwave radiation and the dependence of the output microwave frequency on the beam voltage was observed.
Journal ArticleDOI
Tunable Cerenkov lasers
John Walsh,J. Murphy +1 more
TL;DR: In this article, the concept of a tunable Cerenkov laser is introduced and expressions for the operating wavelength and stimulated emission rate are developed, focusing on the development of criteria which must be met if tunable far-infrared device operation is to be achieved.
Journal ArticleDOI
High-gain cerenkov free-electron laser at far infrared wavelengths
TL;DR: In this article, the authors derived the small-signal gain for a Cerenkov free-electron laser operating in the collective beam limit, which consists of two dielectrically lined parallel plates driven by a cold, relativistic electron beam.
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