Laboratory study of kinetic instabilities in a nonequilibrium mirror-confined plasma
1 Institute of Applied Physics of Russian Academy of Sciences - 46 Ulyanov Str., 603950, Nizhny Novgorod, Russia
2 Lobachevsky State University of Nizhny Novgorod - 23 Gagarina Av., 603950, Nizhny Novgorod, Russia
Received: 30 January 2015
Accepted: 5 March 2015
Kinetic instabilities of nonequilibrium plasma heated by powerful radiation of gyrotron in electron cyclotron resonance conditions and confined in a mirror magnetic trap are reported. Instabilities are manifested as the generation of short pulses of electromagnetic radiation accompanied by precipitation of hot electrons from magnetic trap. Measuring electromagnetic field with high temporal resolution allowed to observe various dynamic spectra of electromagnetic radiation related to at least five types of kinetic instabilities. This paper may be of interest in the context of a laboratory modeling of nonstationary wave-particle interaction processes in nonequilibrium space plasma since the observed phenomena have much in common with similar processes occurring in the magnetosphere of the Earth, planets, and in solar coronal loops.
PACS: 52.72.+v – Laboratory studies of space- and astrophysical-plasma processes / 52.70.Gw – Radio-frequency and microwave measurements
© EPLA, 2015