The effect of microwave power on the Ar9+ and Ar13+ optical emission intensities and ion beam currents in ECRIS
Abstract
The production of Ar9+ and Ar13+ ions in an ECRIS plasma and the efficiency of the ion beam extraction and transport of the resulting Ar9+ and Ar13+ ion beams have been studied with the JYFL 14 GHz ECRIS by using optical emission spectroscopy and measurement of the m/q analyzed beam currents. The relative changes in both the optical emission and the ion beam current in CW mode as function of microwave power and in amplitude modulation (AM) operation mode are reported. The results indicate a discrepancy between the parametric dependence of high charge state ion densities in the core plasma and their extracted beam currents. The observation implies that in CW mode the ion currents could be limited by diffusion transport and electrostatic confinement of the ions rather than beam formation in the extraction region and subsequent transport.
Main Authors
Format
Conferences
Conference paper
Published
2018
Series
Subjects
Publication in research information system
Publisher
AIP Publishing
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201810084372Use this for linking
Parent publication ISBN
978-0-7354-1727-4
Review status
Peer reviewed
ISSN
0094-243X
DOI
https://doi.org/10.1063/1.5053288
Conference
International Conference on Ion Sources
Language
English
Published in
AIP Conference Proceedings
Is part of publication
Proceedings of the 17th International Conference on Ion Sources
Citation
- Kronholm, R., Sakildien, M., Neben, D., Koivisto, H., Kalvas, T., Tarvainen, O., Laulainen, J., & Jones, P. (2018). The effect of microwave power on the Ar9+ and Ar13+ optical emission intensities and ion beam currents in ECRIS. In J. Lettry, E. Mahner, B. Marsh, R. Pardo, & R. Scrivens (Eds.), Proceedings of the 17th International Conference on Ion Sources (Article 040014). AIP Publishing. AIP Conference Proceedings, 2011. https://doi.org/10.1063/1.5053288
License
Funder(s)
European Commission
Funding program(s)
Research infrastructures, H2020
Research infrastructures, H2020
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can be held responsible for them.
Additional information about funding
The project has received funding from the European Unions Horizon 2020 research and innovation programme under
grant agreement No 654002 and the Academy of Finland under the Finnish Centre of Excellence Programme 2012-
2017 (Nuclear and Accelerator Based Physics Research at JYFL). The work is also based on the research supported
in part by iThemba LABS and the National Research Foundation of South Africa (Grant Numbers 109887).
Copyright© AIP Publishing, 2018