6533b7d7fe1ef96bd1267a98
RESEARCH PRODUCT
Plasma instability in the afterglow of electron cyclotron resonance discharge sustained in a mirror trap
Ivan IzotovVadim SkalygaH. KoivistoT. GrahnVille ToivanenPauli PeuraV. G. ZorinTaneli KalvasOlli TarvainenJ. KomppulaDmitry Mansfeldsubject
PhysicsDense plasma focusta114Cyclotron resonanceCondensed Matter Physics01 natural sciences7. Clean energyElectron cyclotron resonanceFourier transform ion cyclotron resonance010305 fluids & plasmasTwo-stream instabilityPhysics::Plasma PhysicsPhysics::Space Physics0103 physical sciencesddc:530Electromagnetic electron wavePlasma diagnosticsAtomic physics010306 general physicsIon cyclotron resonancedescription
The work presented in this article is devoted to time-resolved diagnostics of non-linear effects observed during the afterglow plasma decay of a 14 GHz electron cyclotron resonance ion source operated in pulsed mode. Plasma instabilities that cause perturbations of the extracted ion current during the decay were observed and studied. It is shown that these perturbations are associated with precipitation of high energy electrons along the magnetic field lines and strong bursts of bremsstrahlung emission. The effect of ion source settings on the onset of the observed instabilities was investigated. Based on the experimental data and estimated plasma properties, it is assumed that the instabilities are of cyclotron type. The conclusion is supported by a comparison to other types of plasma devices which exhibit similar characteristics but which operate in a different plasma confinement regime.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-12-01 | Physics of Plasmas |