Transition radiation in an ultrasonic superlattice

Grigorian, L.; Mkrtchyan, A. H.; Saharian, A. A.

doi:10.1016/s0168-583x(98)00101-3

Cited by 20 publications

(6 citation statements)

References 2 publications

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“…In [33][34][35][36][37][38][39][40] the features of the radiation (CR, DR and TR) of relativistic charged particles moving in media with parallel planar interfaces (in particular, due to presence of acoustic fields) are studied. Below we briefly discuss some results of those works.…”

Section: Cherenkov Diffraction and Transition Radiations In The Prese...mentioning

confidence: 99%

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On investigations of radiation processes in media under external influences conducted at the IAPP

Grigoryan,

Saharian,

Grigoryan

et al. 2023

J. Phys.: Conf. Ser.

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One of the areas of research conducted at the Institute of Applied Problems of Physics (IAPP) is the study of the influence of different media on the radiation processes generated by relativistic charged particles (channeling radiation, transition radiation, Cherenkov radiation, diffraction radiation, etc.). Additionally, many interesting phenomena arise when acoustic fields are excited in media. This is exactly the field of study of acoustophysics. The paper is devoted to the review of studies conducted in Lab. 3 of IAPP in these areas.

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Section: Cherenkov Diffraction and Transition Radiations In The Prese...mentioning

confidence: 99%

“…The results obtained in [33][34][35][36][37][38][39][40] can be used to control the parameters of charged particle radiation in laminated media, as well as for diagnostic of periodical structures, for instance, of photonic crystals.…”

Section: Radiation From a Varying Velocity Charge In Flight Through A...mentioning

confidence: 99%

On investigations of radiation processes in media under external influences conducted at the IAPP

Grigoryan,

Saharian,

Grigoryan

et al. 2023

J. Phys.: Conf. Ser.

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“…Introducing the polar and azimuthal angles θ and φ, the wave vector k of the radiated photon is presented as k = k(sin θ cos φ, sin θ sin φ, cos θ), where k = ω √ ε 1 /c and ω is the corresponding angular frequency. Here we use the approximation where the imaginary parts of dielectric permittivities are ignored (for the effects of imaginary part of ε 0 on the properties of the radiation see [10]). At the oblique incidence, α ̸ = 0, the radiation field is formed by a superposition of the waves with two polarizations (parallel and perpendicular polarizations).…”

Section: Introductionmentioning

confidence: 99%

“…The values of the other parameters are the same as for figure 2. Further details with numerical analysis for oblique incidence can be found in [12,13] The features for X-ray transition radiation emitted by ultrarelativistic electrons on an ultrasonic superlattice in fused quartz plate have been discussed in [10] for the normal incidence of the radiating charge. The corresponding conditions for the radiation amplification are specified.…”

Section: Introductionmentioning

confidence: 99%

Radiation processes on acoustic superlattices

Saharian,

Grigoryan,

Khachatryan

et al. 2023

J. Phys.: Conf. Ser.

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We describe several radiation processes in media excited by volume and surface acoustic waves. They include the Cherenkov and transition radiations on acoustic superlattices, transition radiation on an interface with a dynamical periodic structure, the Smith-Purcell radiation on surface waves, bremsstrahlung of high-energy electrons and the creation of electron-positron pairs by high energy photons in crystals in the presence of hypersonic waves. The conditions on the parameters of acoustic fields are specified under which their influence is essential. All these considerations show that the acoustic waves can serve as an efficient mechanism to control the parameters of various kinds of radiation processes.

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“…It is well known that the interference effects in periodic structures considerably increase the transition radiation intensity. In [7], it has been suggested to use ultrasonic waves for the generation of a periodic structure in the radiator of X-ray transition radiation. The optical transition radiation on a plate, in the presence of acoustic waves, is investigated in [8] and [9] for the cases of normal and oblique incidence of the radiating particle.…”

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confidence: 99%

Transition radiation on a superlattice in finite thickness plate generated by two acoustic waves

2018

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Forward transition radiation from relativistic electrons is investigated in an ultrasonic superlattice excited in a finite thickness plate by two acoustic waves. In the quasi-classical approximation formulae are derived for the vector potential of the electromagnetic field and for the spectral-angular distribution of the radiation intensity. Zone structures appear in the plate, which makes it possible (by an appropriate choice of the frequencies of the two acoustic waves) to control the spectral-angular distribution of the radiation through changes in the parameters of the medium. The acoustic waves generate new resonance peaks in the spectral and angular distribution of the radiation intensity. The heights of the peaks can be tuned by choosing the parameters of the acoustic waves. Numerical examples are presented for a plate of fused quartz.

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Transition radiation in an ultrasonic superlattice

Cited by 20 publications

References 2 publications

On investigations of radiation processes in media under external influences conducted at the IAPP

On investigations of radiation processes in media under external influences conducted at the IAPP

Radiation processes on acoustic superlattices

Transition radiation on a superlattice in finite thickness plate generated by two acoustic waves

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