A1 Journal article (refereed)
Study of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency (2020)


Lapin, R. L., Skalyga, V. A., Izotov, I., Razin, S. V., Shaposhnikov, R. A., Vybin, S.S., Bokhanov, A. F., Kazakov, M. Y., & Tarvainen, O. (2020). Study of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency. Review of Scientific Instruments, 91(1), Article 013517. https://doi.org/10.1063/1.5128313


JYU authors or editors


Publication details

All authors or editors: Lapin, R. L.; Skalyga, V. A.; Izotov, I.; Razin, S. V.; Shaposhnikov, R. A.; Vybin, S. S.; Bokhanov, A. F.; Kazakov, M. Yu.; Tarvainen, O.

Journal or series: Review of Scientific Instruments

ISSN: 0034-6748

eISSN: 1089-7623

Publication year: 2020

Volume: 91

Issue number: 1

Article number: 013517

Publisher: American Institute of Physics

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1063/1.5128313

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68030

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1912.04673

Additional information: Contributed paper, published as part of the Proceedings of the 18th International Conference on Ion Sources, Lanzhou, China, September 2019.


Abstract

Negative hydrogen ion sources are used as injectors into accelerators and drive the neutral beam heating in ITER. Certain processes in low-temperature hydrogen plasmas are accompanied by the emission of vacuum ultraviolet (VUV) emission. Studying the VUV radiation, therefore, provides volumetric rates of plasma-chemical processes and plasma parameters. In the past, we have used gasdynamic ECR discharge for volumetric negative ion production and investigated the dependencies between the extracted H− current density and various ion source parameters. It was shown that it is possible to reach up to 80 mA/cm2 of negative ion current density with a two electrode extraction. We report experimental studies on negative hydrogen ion production in a high-density gasdynamic ECR discharge plasma consisting of two simple mirror traps together with the results of VUV emission measurements. The VUV-power was measured in three ranges—Lyα, Lyman band, and molecular continuum—varying the source control parameters near their optima for H− production. It was shown that the molecular continuum emission VUV power is the highest in the first chamber while Lyα emission prevails in the second one. Modifications for the experimental scheme for further optimization of negative hydrogen ion production are suggested.


Keywords: cyclotrons; plasma physics

Free keywords: gasdynamic electron cyclotron resonance; plasma vacuum ultraviolet emission; negative hydrogen ion production


Contributing organizations


Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1


Last updated on 2021-09-08 at 10:02