Theory of Cerenkov Radiation (Iii)

Bolotovskiĭ, Boris M.

doi:10.1070/pu1962v004n05abeh003380

Cited by 130 publications

(95 citation statements)

References 4 publications

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“…[4]. Since that time, many facets of the Vavilov-Cherenkov radiation have been explored, see for example the old [5,6] and the recent [7] reviews as well as monographs [8,9].…”

Section: Introductionmentioning

confidence: 99%

Quantum calculation of the Vavilov-Cherenkov radiation by twisted electrons

2016

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We present the detailed quantum electrodynamical description of Vavilov-Cherenkov radiation emitted by a relativistic twisted electron in the transparent medium. Simple expressions for the spectral and spectral-angular distributions as well as for the polarization properties of the emitted radiation are obtained. Unlike the plane-wave case, the twisted electron produces radiation within the annular angular region, with enhancement towards its boundaries. Additionally, the emitted photons can have linear polarization not only in the scattering plane but also in the orthogonal direction. We find that the Vavilov-Cherenkov radiation emitted by an electron in a superposition of two vortex states exhibits a strong azimuthal asymmetry. Thus, the Vavilov-Cherenkov radiation offers itself as a convenient diagnostic tool of such electrons and complements the traditional microscopic imaging.

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“…[4]. Since that time, many facets of the Vavilov-Cherenkov radiation have been explored, see for example the old [5,6] and the recent [7] reviews as well as monographs [8,9].…”

Section: Introductionmentioning

confidence: 99%

Quantum calculation of the Vavilov-Cherenkov radiation by twisted electrons

2016

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“…23 We can understand that the fields in the problem are made up of the field of a charged particle in an infinite medium and the fields due to the presence of the boundary. Thus the total radiated energy per unit length of path can be calculated as .…”

Section: Theoretical Statementmentioning

confidence: 99%

“…The similar problem for normal dielectric materials was investigated before. [21][22][23] This particular problem presented here is of great interest for the generation of microwaves up to Terahertz waves. This is because the amplitude of the surface wave can be greatly enhanced over some normal dielectric material case when the RCR occurs in the DNM.…”

Section: Introductionmentioning

confidence: 99%

Novel electromagnetic radiation in a semi-infinite space filled with a double-negative metamaterial

et al. 2012

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We have theoretically investigated the electromagnetic radiation excited by a charged particle moving along a semi-infinite space filled with a double-negative metamaterial (DNM). Cherenkov radiation in the double-negative region exhibits reversed or backward radiation behavior. The spectral density of reversed Cherenkov radiation (RCR) has a continuous distribution over the radiation frequency region. The influence of some important parameters on the Cherenkov radiation energy per unit length has been discussed. The surface wave in the vacuum region presented here also is investigated. We conclude that the amplitude of the surface wave is greatly enhanced over some normal dielectric materials cases. The enhanced surface wave may be useful for high frequency and high power vacuum electron devices with the DNM.

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“…The analysis of the problem is based on the waveguide mode formalism applied to a resonant dispersive medium excited by external optical pumping. The theory of Cherenkov radiation in waveguides loaded with a dielectric medium was outlined previously in variety of publications (see, for example, the review article [5]). However, Cherenkov radiation in waveguides with dispersive…”

Section: Introductionmentioning

confidence: 99%

Wakefields Generated by Electron Beams Passing through a Waveguide Loaded with an Active Medium

Tyukhtin

Kanareykin

Schoessow

2006

AIP Conference Proceedings

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Abstract. The wakefields of a relativistic electron beam passing through a waveguide loaded with an active medium with weak resonant dispersion have been considered. For the calculations in this paper the parameters of the medium are those of a solution of fullerene (C 60 ) in a nematic liquid crystal that exhibits activity in the X-band [4]. It was shown that several of the TM accelerating modes can be amplified for the geometries under consideration; structures in which higher order modes are amplified exhibit essential advantages as PASERs. In particular, the amplification of the highest mode occurs in a structure loaded with a rather thick active medium layer that maximizes the energy stored by the active medium.

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Theory of Cerenkov Radiation (Iii)

Cited by 130 publications

References 4 publications

Quantum calculation of the Vavilov-Cherenkov radiation by twisted electrons

Quantum calculation of the Vavilov-Cherenkov radiation by twisted electrons

Novel electromagnetic radiation in a semi-infinite space filled with a double-negative metamaterial

Wakefields Generated by Electron Beams Passing through a Waveguide Loaded with an Active Medium

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