GOL-PET experiments on THZ-emission from dense plasma at relativistic electron beam relaxation

Author

Arzhannikov, A.V. ; Burdakov, A.V. ; Burmasov, V.S. ; Gavrilenko, D.E. ; Ivanov, I.A. ; Kasatov, A.A. ; Kuznetsov, S.A. ; Makarov, M.A. ; Mekler, K.I. ; Polosatkin, S.V. ; Postupaev, V.V. ; Rovenskikh, A.F. ; Sinitsky, S.L. ; Sklyarov, V.F. ; Stepanov, V.

Author_Institution

Novosibirsk State Univ., Novosibirsk, Russia

fYear

2015

fDate

24-28 May 2015

Firstpage

1

Lastpage

1

Abstract

Summary form only given. Electromagnetic emission from plasma in the vicinity of the fundamental plasma frequency and at its double value during a relativistic electron beam (REB) relaxation is studied at the GOL-3 facility [1]. In our paper we will present results of experiments carried out on the specialized GOL-PET device for the emission of terahertz radiation from plasma at its density ~ 10¹⁵ cm^-3 and the magnetic field strength 2-4 T. The plasma column created by a high-voltage discharge in the GOL-PET device has its diameter 6 cm and the length about of 250 cm. The injected electron beam has the following parameters: ~0.8 MeV, ~20 kA, ~10 μs. The beam current density in the plasma is up to 3kA/cm². The radiation in the frequency interval from 0.1 up to 0.8 THz is analyzed by fast eight-channel polychromator and polarimeter based on frequency selection quasioptical elements.Results of the experimental measurements will be discussed in accordance to theoretical description with taking into account the influence of the magnetic field and high level turbulent in the plasma [2].

Keywords

discharges (electric); plasma beam injection heating; plasma density; plasma diagnostics; plasma magnetohydrodynamics; plasma turbulence; polarimeters; relativistic electron beams; GOL-3 facility; GOL-PET device; beam current density; current 20 kA; dense plasma; electromagnetic emission; electron volt energy 0.8 MeV; fast eight-channel polychromator; frequency 0.1 THz to 0.8 THz; frequency interval; frequency selection quasioptical elements; fundamental plasma frequency; high level plasma turbulence; high-voltage discharge; injected electron beam; magnetic field strength; magnetic flux density 2 T to 4 T; plasma column; plasma density; polarimeter; relativistic electron beam relaxation; size 250 cm; size 6 cm; terahertz radiation emission; time 10 mus; Discharges (electric); Electromagnetics; Electron beams; Magnetic fields; Nuclear physics; Plasmas; Terahertz radiation;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Sciences (ICOPS), 2015 IEEE International Conference on

Conference_Location

Antalya

Type

conf

DOI

10.1109/PLASMA.2015.7179505

Filename

7179505