The biased disc of an electron cyclotron resonance ion source as a probe of instability-induced electron and ion losses
Abstract
Electron Cyclotron Resonance Ion Source (ECRIS) plasmas are prone to kinetic instabilities resulting in loss of electron and ion confinement. It is demonstrated that the biased disk of an ECRIS can be used as a probe to quantify such instability-induced electron and ion losses occurring in less than 10 µs. The qualitative interpretation of the data is supported by the measurement of the energy spread of the extracted ion beams implying a transient plasma potential >1.5 kV during the instability. A parametric study of the electron losses combined with electron tracking simulations allows for estimating the fraction of electrons expelled in each instability event to be on the order of 10% of the total electron population.
Main Authors
Format
Articles
Research article
Published
2019
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-202003042275Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
0034-6748
DOI
https://doi.org/10.1063/1.5126935
Conference
International Conference on Ion Sources
Language
English
Published in
Review of Scientific Instruments
Citation
- Tarvainen, O., Kronholm, R., Kalvas, T., Koivisto, H., Izotov, I., Skalyga, V., Toivanen, V., & Maunoury, L. (2019). The biased disc of an electron cyclotron resonance ion source as a probe of instability-induced electron and ion losses. Review of Scientific Instruments, 90(12), Article 123303. https://doi.org/10.1063/1.5126935
License
Funder(s)
Research Council of Finland
European Commission
Funding program(s)
Akatemiahanke, SA
Research infrastructures, H2020
Academy Project, AoF
Research infrastructures, H2020
Additional information about funding
This work has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 654002, the Academy of Finland under the Finnish Centre of Excellence Program 2012–2017 (Nuclear and Accelerator Based Physics Research at JYFL, Project No. 213503), and the Academy of Finland Project (No. 315855). The research of V. A. Skalyga and I. V. Izotov was carried out within the state assignment of the Ministry of Science and Higher Education of the Russian Federation under Grant No. 0035-2019-0002.
Copyright© 2019 Author(s)