A4 Article in conference proceedings
Gas mixing and double frequency operation of the permanent magnet quadrupole minimum-B electron cyclotron resonance ion source CUBE-ECRIS (2024)
Toivanen, V., Kalvas, T., Koivisto, H., Kosonen, S., & Tarvainen, O. (2024). Gas mixing and double frequency operation of the permanent magnet quadrupole minimum-B electron cyclotron resonance ion source CUBE-ECRIS. In 20th International Conference on Ion Sources (Article 012047). IOP Publishing. Journal of Physics : Conference Series, 2743. https://doi.org/10.1088/1742-6596/2743/1/012047
JYU authors or editors
Publication details
All authors or editors: Toivanen, Ville; Kalvas, Taneli; Koivisto, Hannu; Kosonen, Sami; Tarvainen, Olli
Parent publication: 20th International Conference on Ion Sources
Conference:
- International Conference on Ion Sources
Place and date of conference: Victoria, BC, Canada, 17.-22.9.2023
Journal or series: Journal of Physics : Conference Series
ISSN: 1742-6588
eISSN: 1742-6596
Publication year: 2024
Publication date: 01/05/2024
Number in series: 2743
Article number: 012047
Publisher: IOP Publishing
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.1088/1742-6596/2743/1/012047
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94947
Abstract
CUBE-ECRIS is a recently commissioned permanent magnet electron cyclotron resonance (ECR) ion source developed at the university of Jyväskylä accelerator laboratory. The special features of the new ion source design include an unconventional quadrupole minimum-B magnetic field structure and a slit beam extraction system necessitated by the line-shaped plasma loss fluxes. Gas mixing and double frequency operation are widely used methods to optimize high charge state ion production of conventional ECR ion sources. The work presented here demonstrates the applicability of these methods for boosting the high charge state beam currents of argon, krypton and xenon extracted from CUBE-ECRIS. Oxygen and helium were used as mixing gases and microwave frequencies between 10 and 11 GHz were used for single and double frequency operation. Gas mixing has a strong impact on the high charge state beam currents. For example, the highest observed charge state increased from 15+ to 19+ for krypton and from 16+ to 23+ for xenon with oxygen gas mixing. Double frequency operation provides an additional performance improvement, for example the currents of argon 9+ and 11+ beams, produced with gas mixing, increased 30% and 100% in double frequency operation at the same total power.
Keywords: plasma physics; cyclotrons
Contributing organizations
Related projects
- The effect of magnetic field configuration on the performance of minimum-B ECR ion source
- Koivisto, Hannu
- Research Council of Finland
Ministry reporting: Yes
Preliminary JUFO rating: 1