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 in
AIP Conference ProceedingsAuthors
Date
2018Copyright
© 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.
Publisher
AIP PublishingParent publication ISBN
978-0-7354-1727-4Conference
International Conference on Ion SourcesIs part of publication
Proceedings of the 17th International Conference on Ion SourcesISSN Search the Publication Forum
0094-243XKeywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/28653309
Metadata
Show full item recordCollections
Related funder(s)
European CommissionFunding program(s)
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 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). ...License
Related items
Showing items with similar title or keywords.
-
Plasma response to amplitude modulation of the microwave power on a 14 GHz electron cyclotron resonance ion source
Neben, Derek; Tarvainen, Olli; Kronholm, Risto; Koivisto, Hannu; Kalvas, Taneli; Machicoane, Guillaume; Leitner, Daniela (AIP Publishing, 2018)This paper reports the effects of sinusoidal microwave power Amplitude Modulation (AM) on the performance of Electron Cyclotron Resonance (ECR) ion sources. The study was conducted on the 14 GHz ECR ion source ECR2 at the ... -
Experimental evidence on microwave induced electron losses from ECRIS plasma
Sakildien, M.; Tarvainen, Olli; Kronholm, Risto; Izotov, I.; Skalyga, V.; Kalvas, Taneli; Jones, P.; Koivisto, H. (AIP Publishing LLC, 2018)The balance between warm and hot (>1 keV) electron density and their losses from the magnetic confinement system of an Electron Cyclotron Resonance Ion Source (ECRIS) plasma is considered to be one of the main factors ... -
Status of new developments in the field of high-current gasdynamic ECR ion sources at the IAP RAS
Skalyga, V. A.; Golubev, S. V.; Izotov, I. V.; Kazakov, M. Yu.; Lapin, R. L.; Razin, S. V.; Sidorov, A. V.; Shaposhnikov, R. A.; Bokhanov, A. F.; Tarvainen, Olli (AIP Publishing, 2018)The experimental and theoretical research carried out in the past at the Institute of Applied Physics (IAP RAS) resulted in development of a new type of electron cyclotron resonance ion source (ECRIS) – the gasdynamic ... -
Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics
Sakildien, Muneer; Tarvainen, Olli; Kalvas, Taneli; Koivisto, Hannu; Kronholm, Risto; Thomae, Rainer; Mira, Joele; Nemulodi, Fhumulani; Jones, Pete (AIP Publishing, 2018)Mixing a lighter gas species into the plasma of an ECRIS is known to enhance high charge state production of the heavier gas species. With this investigation, Kα diagnostics, optical emission spectroscopy and the measured ... -
The effect of plasma instabilities on the background impurities in charge breeder ECRIS
Tarvainen, Olli; Angot, Julien; Izotov, Ivan; Skalyga, Vadim; Koivisto, Hannu; Thuillier, Thomas; Kalvas, Taneli; Toivanen, Ville; Kronholm, Risto; Lamy, Thierry (AIP Publishing, 2018)Experimental observations of plasma instabilities in the 14.5 GHz PHOENIX charge breeder ECRIS are summarized. It has been found that the injection of 133Cs+ or 85Rb+ into oxygen discharge of the CB-ECRIS can trigger ...