The effect of microwave power on the Ar9+ and Ar13+ optical emission intensities and ion beam currents in ECRIS
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
Published inAIP Conference Proceedings
© AIP Publishing, 2018
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.
Parent publication ISBN978-0-7354-1727-4
ConferenceInternational Conference on Ion Sources
Is part of publicationProceedings of the 17th International Conference on Ion Sources
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Related funder(s)European Commission
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThe 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). ...
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