Limitation of the ECRIS performance by kinetic plasma instabilities (invited)
Tarvainen, O., Kalvas, T., Koivisto, H., Komppula, J., Kronholm, R., Laulainen, J., Izotov, I., Mansfeld, D., Skalyga, V., Toivanen, V., & Machicoane, G. (2016). Limitation of the ECRIS performance by kinetic plasma instabilities (invited). Review of Scientific Instruments, 87(2), Article 02A703. https://doi.org/10.1063/1.4931716
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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.
Electron cyclotron resonance ion source (ECRIS) plasmas are prone to kinetic instabilities due to
anisotropic electron velocity distribution. The instabilities are associated with strong microwave emission
and periodic bursts of energetic electrons escaping the magnetic confinement. The instabilities
explain the periodic ms-scale oscillation of the extracted beam current observed with several high
performance ECRISs and restrict the parameter space available for the optimization of extracted
beam currents of highly charged ions. Experiments with the JYFL 14 GHz ECRIS have demonstrated
that due to the instabilities the optimum Bmin-field is less than 0.8BECR, which is the value
suggested by the semiempirical scaling laws guiding the design of ECRISs.
Publisher
American Institute of PhysicsISSN Search the Publication Forum
0034-6748Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/25230010
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Periodic Beam Current Oscillations Driven by Electron Cyclotron Instabilities in ECRIS Plasmas
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Kinetic instabilities in pulsed operation mode of a 14 GHz electron cyclotron resonance ion source
Tarvainen, Olli; Kalvas, Taneli; Koivisto, Hannu; Komppula, Jani; Kronholm, Risto; Laulainen, Janne; Izotov, I.; Mansfeld, D.; Skalyga, V. (American Institute of Physics, 2016)The occurrence of kinetic plasma instabilities is studied in pulsed operation mode of a 14 GHz Aelectron cyclotron resonance type electron cyclotron resonance ion source. It is shown that the temporal delay between the ...