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Cyclotron instability in the afterglow mode of minimum-B ECRIS

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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
Published in
Review of Scientific Instruments
Authors
Izotov, I. |
Kalvas, Taneli |
Koivisto, Hannu |
Komppula, Jani |
Kronholm, Risto |
Laulainen, Janne |
Mansfeld, D. |
Skalyga, V. |
Tarvainen, Olli
Date
2016
Discipline
KiihdytinlaboratorioAccelerator Laboratory
Copyright
© 2015 AIP Publishing LLC. Published in this repository with the kind permission of the publisher.

 
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.
Publisher
American Institute of Physics
ISSN Search the Publication Forum
0034-6748
Keywords
electron cyclotron resonance ion sources plasma instability
DOI
https://doi.org/10.1063/1.4935624
URI

http://urn.fi/URN:NBN:fi:jyu-201606062909

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/25288467

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  • Matemaattis-luonnontieteellinen tiedekunta [5283]

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