This article is cited in 2 papers

Interaction of laser radiation with matter. Laser plasma

Generation of a quasi-static magnetic field by a circularly polarised laser pulse due to tunnelling gas ionisation

I. M. Gabdrakhmanov^a, V. Yu. Bychenkov<sup>ab

a</sup> P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow
^b The Center for Fundamental and Applied Research, All-Russia Research Institute of Automatics, Moscow

Abstract: We present a theoretical model of the quasi-static magnetic field generation in a laser channel, which is formed behind the front of a short laser pulse that ionises a gas. The generation of a magnetic field is caused by the appearance of the electron pressure anisotropy during tunnelling ionisation of atoms. In the considered case of subrelativistic laser light intensities, the generated magnetic field can reach ~1 MG with an energy transformation ratio of about 1%, which paves the way for identifying the proposed mechanism when use is made of a wide class of ultrashort pulse lasers.

Keywords: quasi-static magnetic field, tunnelling gas ionisation, subrelativistic intensity, ultrashort laser pulses.

Received: 30.01.2020
Revised: 29.03.2020

 English version: Quantum Electronics, 2020, 50:9, 838–843

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