Cyclotron instability in the afterglow mode of minimum-B ECRIS

Abstract
It was shown recently that cyclotron instability in non-equilibrium plasma of a minimum-B electron cyclotron resonance ion source (ECRIS) causes perturbation of the extracted ion current and generation of strong bursts of bremsstrahlung emission, which limit the performance of the ion source. The present work is devoted to the dynamic regimes of plasma instability in ECRIS operated in pulsed mode. Instability develops in decaying plasma shortly after heating microwaves are switched off and manifests itself in the form of powerful pulses of electromagnetic emission associated with precipitation of high energy electrons. Time-resolved measurements of microwave emission bursts are presented. It was found that even in various gases (helium and oxygen were studied) and at different values of magnetic field and heating power, the dynamic spectra demonstrate common features: decreasing frequency within a single burst as well as from one burst to another.
Main Authors
Format
Articles Research article
Published
2016
Series
Subjects
Publication in research information system
Publisher
American Institute of Physics
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201606062909Use this for linking
Review status
Peer reviewed
ISSN
0034-6748
DOI
https://doi.org/10.1063/1.4935624
Language
English
Published in
Review of Scientific Instruments
Citation
  • Izotov, I., Kalvas, T., Koivisto, H., Komppula, J., Kronholm, R., Laulainen, J., Mansfeld, D., Skalyga, V., & Tarvainen, O. (2016). Cyclotron instability in the afterglow mode of minimum-B ECRIS. Review of Scientific Instruments, 87(2), Article 02A729. https://doi.org/10.1063/1.4935624
License
Open Access
Copyright© 2015 AIP Publishing LLC. Published in this repository with the kind permission of the publisher.

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