Cyclotron instability in the afterglow mode of minimum-B ECRIS
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
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Review of Scientific InstrumentsAuthors
Date
2016Copyright
© 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.
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American Institute of PhysicsISSN Search the Publication Forum
0034-6748Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/25288467
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