A way of increasing the transition radiation from a modulated electron beam in an inhomogeneous plasma

Anisimov, I. A.; Kotlyarov, I. Yu.; Levitskii, S. M.

doi:10.1007/bf01060014

Cited by 2 publications

(4 citation statements)

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“…Note that the magnitude of the transition radiation depends strongly on the position of the LPRR (in the linear part of plasma density profile or near its maximum). As shown by (2.12) and (3.5), if L ln and I sq are of the same order of magnitude, then 4) which means that the radiation at a frequency equal to the Langmuir frequency at the plasma density maximum is much stronger than the radiation at lower frequencies (note that a similar result was obtained in [8] for thin plasma layers with a parabolic concentration profile; the interpretation of this effect was given in [9]). So maxima in the spectrum of the transition radiation correspond to maxima of the plasma density profile.…”

Section: Discussion and Numerical Estimatesmentioning

confidence: 75%

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Plasma-object diagnostics via resonant transition radiation from an electron bunch

Anisimov

Lyubich

2001

J. Plasma Phys.

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The resonant transition radiation from an electron charge that moves along the concentration gradient of a cold isotropic plasma is calculated. The possibility of using this radio-emission for inhomogeneous plasma diagnostics is discussed. Measurements of this kind of radiation in a planar-stratified cold isotropic plasma give the possibility of finding out the profile function of the plasma concentration profile (parts of the plasma density profile where the density is increased over its previous maximum value along the direction of the plasma bunch velocity).

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Section: Discussion and Numerical Estimatesmentioning

confidence: 75%

“…Since only waves with κ 2 (z → −∞) > 0 make contributions to the radiation field, we can vary k r from 0 to k 0 . Using the substitutions 9) and the asymptotics for Bessel functions of large argument, we can derive (2.6) in the far zone (R → ∞):…”

Section: Resonant Transition Radiation Of An Electron Bunch In the Camentioning

confidence: 99%

Plasma-object diagnostics via resonant transition radiation from an electron bunch

Anisimov

Lyubich

2001

J. Plasma Phys.

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“…In order to calculate the integrated density Π OSW of the OSWs energy flux over the electron transit time, we use Eq. (12). Since the OSWs are evanescent waves, the OSWs Poynting vector is directed strictly along the interface, and the features of the OSWs excitation cannot be seen in the spectral density of the waves emitted into the upper hemisphere.…”

Section: Transition Radiation Of the Oblique Surface Electromagnetic ...mentioning

confidence: 99%

“…The transition radiation of surface electromagnetic waves by a non-relativistic electron bunch which crosses the vacuum-semiconductor interface or a thin plate of a semiconductor was studied in Ref. 11, and now the radiation of modulated electron beams crossing a boundary of a plasma-like medium becomes a very effective method for generation of surface electromagnetic waves 12 .…”

Section: Introductionmentioning

confidence: 99%

Terahertz transition radiation of bulk and surface electromagnetic waves by an electron entering a layered superconductor

et al. 2014

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We theoretically study the transition radiation of bulk and surface electromagnetic waves by an electron crossing an interface between a layered superconductor and an isotropic dielectric. We assume that the direction of the electron motion and the orientation of the superconducting layers are perpendicular to the interface. We derive the analytical expressions for the strongly anisotropic radiation fields and for the time-integrated energy fluxes of bulk and oblique surface electromagnetic waves (OSWs). We show that the OSWs with frequencies close to the Josephson plasma frequency ωJ provide the main contribution to the OSWs energy flux. Moreover, for frequencies close to the Josephson plasma frequency, the spectral density of the OSWs radiation diverges at some critical value of the azimuth angle ϕ. At the angles ϕ = 0 and ϕ = 90 o , the radiation field has a transverse magnetic polarization. We have also studied the Cherenkov radiation by the electron escaping from the layered superconductor and show that this radiation is almost monochromatic. A remarkable feature of the Cherenkov radiation in a layered superconductor is that, contrary to the isotropic case, the Cherenkov radiation distinctly manifests itself in the angular dependence of the radiation energy flux.

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A way of increasing the transition radiation from a modulated electron beam in an inhomogeneous plasma

Cited by 2 publications

References 1 publication

Plasma-object diagnostics via resonant transition radiation from an electron bunch

Plasma-object diagnostics via resonant transition radiation from an electron bunch

Terahertz transition radiation of bulk and surface electromagnetic waves by an electron entering a layered superconductor

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