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Operational Domain in Hydrogen Plasmas on the GOLEM Tokamak

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Abstract

A series of discharges in hydrogen were performed in two experimental sessions. The vessel was not conditioned before the first session, while inductive heating of the vessel and cleaning glow discharge were applied before the second session. Experimental results from both sessions are compared, and optimum operational conditions for the majority of key plasma parameters are determined. It is found that plasma performance with a properly conditioned vessel is significantly better, as expected. In particular, a noticeable increase of discharge duration, and of the electron temperature is observed.

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Acknowledgements

The first experimental session was performed during 8th International Workshop and Summer School on Plasma Physics, Kiten, (June 2018, Bulgaria). Authors acknowledge an active contribution of participants of the workshop. Authors also thank to Vladimir Fuchs for careful reading the manuscript and for his valuable comments. This work was partially supported by the EU Operational program Research, Development and Education No CZ.02.1.01/0.0/0.0/16_019/0000778 Centre of Advanced Applied Sciences. Additional support has been granted from International Atomic Energy Association Research Contract F13019, entitled “Network of Small and Medium Size Magnetic Confinement Fusion Devices for Fusion Research” and the Joint project between the Bulgarian and Czech Academies of Sciences, BAS – 17-05. The opinions expressed by authors do not necessarily represent the positions of the European Commission neither IAEA.

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Authors and Affiliations

  1. Faculty on Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19, Prague, Czech Republic

    Vojtech Svoboda & Jan Stockel

  2. Faculty of Forest Industry, University of Forestry, Bulevard “Sveti Kliment Ohridski” 10, 1756, Sofia, Bulgaria

    Maya Zhekova & Plamena Marinova

  3. Acad. E. Djakov Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria

    Miglena Dimitrova

  4. Institute of Plasma Physics, AS CR, Za Slovankou 3, 182 00, Prague, Czech Republic

    Miglena Dimitrova, Ales Podolník & Jan Stockel

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  1. Vojtech Svoboda
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  2. Maya Zhekova
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  3. Miglena Dimitrova
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  4. Plamena Marinova
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  5. Ales Podolník
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  6. Jan Stockel
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Correspondence to Vojtech Svoboda.

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Svoboda, V., Zhekova, M., Dimitrova, M. et al. Operational Domain in Hydrogen Plasmas on the GOLEM Tokamak. J Fusion Energ 38, 253–261 (2019). https://doi.org/10.1007/s10894-019-00215-7

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