Plasma instability in the afterglow of electron cyclotron resonance discharge sustained in a mirror trap

Journal Article · Sat Dec 15 04:00:00 EST 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4769260· OSTI ID:22072628

Izotov, I; Mansfeld, D; Skalyga, V; Zorin, V ^[1]; Grahn, T; Kalvas, T; Koivisto, H; Komppula, J; Peura, P; Tarvainen, O; Toivanen, V ^[2]

---

1. Institute of Applied Physics, RAS, 46 Ulyanova St., 603950 Nizhny Novgorod (Russian Federation)
2. Department of Physics, University of Jyvaeskylae, P.O. Box 35 (YFL), 40500 Jyvaeskylae (Finland)

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.

• OSTI ID: 22072628
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AFTERGLOW
BREMSSTRAHLUNG
DISTURBANCES
ECR ION SOURCES
ELECTRON CYCLOTRON-RESONANCE
EXPERIMENTAL DATA
GHZ RANGE
MAGNETIC FIELDS
MIRRORS
NONLINEAR PROBLEMS
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA INSTABILITY
TIME RESOLUTION