Study of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency
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
Published inReview of Scientific Instruments
© 2020 Authors.
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. ...
PublisherAmerican Institute of Physics
Publication in research information system
MetadataShow full item record
Additional information about fundingThis work was supported by the grant of Russian Science Foundation (Project No. 19-12-00377).
Showing items with similar title or keywords.
Influence of axial mirror ratios on the kinetic instability threshold in electron cyclotron resonance ion source plasma Toivanen, V.; Bhaskar, B. S.; Koivisto, H.; Maunoury, L.; Tarvainen, O.; Thuillier, T. (American Institute of Physics, 2022)Electron Cyclotron Resonance (ECR) ion source plasmas are prone to kinetic instabilities. The onset of the instabilities manifests as emission of microwaves, bursts of electrons expelled from the plasma volume, and the ...
Efficiency investigation of a negative hydrogen ion beam production with the use of the gasdynamic ECR plasma source Lapin, R. L.; Skalyga, V. A.; Izotov, I. V.; Golubev, S. V.; Razin, S. V.; Bokhanov, A. F.; Kazakov, M. Yu.; Shaposhnikov, R. A; Kiseleva, E. M.; Tarvainen, O. (IOP Publishing, 2020)Negative hydrogen ion sources are of great demand in modern physics as injectors into accelerators and drivers for neutral beam injectors for fusion devices. It has been shown earlier that the use of the gasdynamic ECR ...
Sakieldien, Moenir (University of Jyväskylä, 2018)This thesis presents the results of an investigation of the volumetric Kα emission rate/inner shell ionization rate from an Electron Cyclotron Resonance Ion Source (ECRIS) plasma tuned predominantly for high charge state ...
Komppula, Jani (University of Jyväskylä, 2015)
Observation of Poincaré-Andronov-Hopf Bifurcation in Cyclotron Maser Emission from a Magnetic Plasma Trap Shalashov, A. G.; Gospodchikov, E. D.; Izotov, I. V.; Mansfeld, D. A.; Skalyga, V. A.; Tarvainen, Olli (American Physical Society, 2018)We report the first experimental evidence of a controlled transition from the generation of periodic bursts of electromagnetic radiation into the continuous-wave regime of a cyclotron maser formed in magnetically confined ...