A1 Journal article (refereed)
Estimating ion confinement times from beam current transients in conventional and charge breeder ECRIS (2020)

Marttinen, M., Angot, J., Annaluru, A., Jardin, P., Kalvas, T., Koivisto, H., Kosonen, S., Kronholm, R., Maunoury, L., Tarvainen, O., Toivanen, V., & Ujic, P. (2020). Estimating ion confinement times from beam current transients in conventional and charge breeder ECRIS. Review of Scientific Instruments, 91(1), Article 013304. https://doi.org/10.1063/1.5128546

JYU authors or editors

Publication details

All authors or editors: Marttinen, M.; Angot, J.; Annaluru, A.; Jardin, P.; Kalvas, T.; Koivisto, H.; Kosonen, S.; Kronholm, R.; Maunoury, L.; Tarvainen, O.; et al.

Journal or series: Review of Scientific Instruments

ISSN: 0034-6748

eISSN: 1089-7623

Publication year: 2020

Volume: 91

Issue number: 1

Article number: 013304

Publisher: American Institute of Physics

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1063/1.5128546

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67461

Abstract

Cumulative ion confinement times are probed by measuring decaying ion current transients in pulsed material injection mode. The method is applied in a charge breeder and conventional ECRIS yielding mutually corroborative results. The cumulative confinement time estimates vary from approximately 2 ms–60 ms with a clear dependence on the ion charge-to-mass ratio—higher charges having longer residence times. The long cumulative confinement times are proposed as a partial explanation to recently observed unexpectedly high ion temperatures. The results are relevant for rare ion beam (RIB) production as the confinement time and the lifetime of stable isotopes can be used for estimating the extracted RIB production efficiency.

Keywords: plasma technology

Free keywords: plasma sources; plasma diagnostics; ion sources; plasma discharges

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Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1