Coherence effects in ultra-relativistic electron bremsstrahlung

Galitsky, V.M.; Gurevich, I.I.

doi:10.1007/bf02733969

Cited by 43 publications

(48 citation statements)

References 1 publication

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“…Both suppressions reduce the effective formation length of the photon, so the suppressions do not simply multiply [21]. For relativistic electrons, the total suppression factor S can be shown to be [21] S(T, ν) = 1…”

Section: E Total Suppressionmentioning

confidence: 99%

Molecular bremsstrahlung radiation at GHz frequencies in air

et al. 2016

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A detection technique for ultra-high energy cosmic rays, complementary to the fluorescence technique, would be the use of the molecular Bremsstrahlung radiation emitted by low-energy ionization electrons left after the passage of the showers in the atmosphere. In this article, a detailed estimate of the spectral intensity of photons at ground level originating from this radiation is presented. The spectral intensity expected from the passage of the high-energy electrons of the cascade is also estimated. The absorption of the photons in the plasma of electrons/neutral molecules is shown to be negligible. The obtained spectral intensity is shown to be 2 × 10 −21 W cm −2 GHz −1 at 10 km from the shower core for a vertical shower induced by a proton of 10 17.5 eV. In addition, a recent measurement of Bremsstrahlung radiation in air at gigahertz frequencies from a beam of electrons produced at 95 keV by an electron gun is also discussed and reasonably reproduced by the model.

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Section: E Total Suppressionmentioning

confidence: 99%

Molecular bremsstrahlung radiation at GHz frequencies in air

et al. 2016

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“…A simple calculation of this effect can be done by limiting l f to a maximum of 1X 0 [10]. This suppression is visible (stronger than LPM and dielectric suppression) for…”

Section: Suppression Of Bremsstrahlung By Pair Creation and Vice-vmentioning

confidence: 99%

Bremsstrahlung and pair creation: Suppression mechanisms and how they affect EHE air showers

Klein¹

1998

Workshop on Observing Giant Cosmic Ray Air Showers From ≫10

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Abstract. Most calculations of air shower development have been based on the BetheHeitler cross sections for bremsstrahlung and pair production. However, for energetic enough particles, a number of different external factors can reduce these cross sections drastically, slowing shower development and lengthening the showers. Four mechanisms that can suppress bremsstrahlung and pair production cross sections are discussed, and their effect on extremely high energy air showers considered. Besides lengthening the showers, these mechanisms greatly increase the importance of fluctuations in shower development, and can increase the angular spreading of showers.

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“…Thus, in practice, one has first to accurately determine which angles are relevant, and from which particular direction they are to be counted off. For instance, the Landau-Pomeranchuk-Migdal suppression of the soft part of radiation spectrum from an * Electronic address: bon@kipt.kharkov.ua electron in a thick amorphous target [6,7] is known to be described by the photon formation length depending on the mean square deflection angle accumulated by the electron in the target, with θ 2 ∼ χ 2 γ −2 [8][9][10]. On the contrary, the aforementioned case of nondipole bremsstrahlung on a pair of amorphous foils [5] seems to be related only with the free photon formation length (defined in the absence of electron scattering), when θ γ −1 [4].…”

Section: Introductionmentioning

confidence: 99%

Interference in spectrum of radiation from doubly scattered charged particle

Bondarenco

Шульга

2017

Phys. Rev. D

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Existence of different types of interference in the spectrum of radiation emitted by a doubly hard scattered electron is demonstrated. The spectrum develops oscillations in two regions: the hard, where the oscillations depend on the electron Lorentz factor, and the soft, where the oscillations depend on the electron scattering angles. This interference pattern owes to the presence of jetlike radiation configurations, formed by a piecewise-rectilinearly moving electron and the accompanying photon. The corresponding nondipole decomposition relation is derived. Notions describing proper field formation and interference, and presumably being applicable more generally, are discussed in detail.

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Coherence effects in ultra-relativistic electron bremsstrahlung

Cited by 43 publications

References 1 publication

Molecular bremsstrahlung radiation at GHz frequencies in air

Molecular bremsstrahlung radiation at GHz frequencies in air

Bremsstrahlung and pair creation: Suppression mechanisms and how they affect EHE air showers

Interference in spectrum of radiation from doubly scattered charged particle

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