Extreme laser radiation: physics and fundamental applications

Specific features of betatron oscillations and betatron emission in a hollow-channel plasma

A. A. Golovanov^ab, I. Yu. Kostyukov<sup>ab

a</sup> Institute of Applied Physics of the Russian Academy of Sciences, Nizhnii Novgorod
^b Lobachevski State University of Nizhni Novgorod

Abstract: Transverse betatron oscillations and the corresponding betatron emission are investigated for electrons in a strongly nonlinear wake wave excited by a high-power laser pulse in a hollowchannel plasma. The expressions for the oscillation period and critical frequency in the synchrotron regime of betatron emission are derived. A two-stage scheme is considered, in which an electron bunch formed in a plasma possessing a certain set of parameters generates betatron emission in a plasma possessing another set of parameters. The emission spectrum at the second stage is calculated in the absence of bunch acceleration.

Keywords: laser-plasma acceleration, betatron oscillations, betatron emission.

Received: 06.02.2017

 English version: Quantum Electronics, 2017, 47:3, 188–193

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