Breakdown Phase in the GOLEM Tokamak and Its Impact on Plasma Performance

Authors

  • Y. Siusko National Science Center Kharkov Institute of Physics and Technology
  • V. Svoboda Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering
  • J. Stockel Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering
  • I. Garkusha National Science Center Kharkov Institute of Physics and Technology, V.N. Karazin Kharkiv National University, School of Physics and Technology
  • D. Solyakov National Science Center Kharkov Institute of Physics and Technology, V.N. Karazin Kharkiv National University, School of Physics and Technology
  • I. Girka V.N. Karazin Kharkiv National University, School of Physics and Technology
  • V. Volkov V.N. Karazin Kharkiv National University, School of Physics and Technology
  • D. Bondar V.N. Karazin Kharkiv National University, School of Physics and Technology
  • V. Kondratenko V.N. Karazin Kharkiv National University, School of Physics and Technology
  • A. Boychenko V.N. Karazin Kharkiv National University, School of Physics and Technology
  • A. Krupka V.N. Karazin Kharkiv National University, School of Physics and Technology
  • D. Boloto V.N. Karazin Kharkiv National University, School of Physics and Technology
  • D. Drozdov V.N. Karazin Kharkiv National University, School of Physics and Technology
  • O. Salmin V.N. Karazin Kharkiv National University, School of Physics and Technology
  • A. Shchibrya V.N. Karazin Kharkiv National University, School of Physics and Technology

DOI:

https://doi.org/10.15407/ujpe66.3.231

Keywords:

GOLEM tokamak, breakdown, avalanche, particle losses, plasma parameters

Abstract

The effect of the breakdown phase on subsequent plasma parameters in GOLEM tokamak is investigated remotely. The dependence of the breakdown voltage and the breakdown time on the time delay between the switchings-on of a toroidal magnetic field Bt and a toroidal electric field Et for different groups of the pressure magnitudes is built. The performed experiments have shown that, for GOLEM tokamak, the shorter the temporal delay, the better are the mean plasma parameters. In addition, the breakdown phase is discussed in more details. In the discussion, the avalanche phase of the breakdown is analyzed. The dominant mechanism of particle losses during the avalanche phase, future steps, and tasks are discussed and set. The experiments on studying the breakdown phase have been carried out remotely on GOLEM tokamak by undergraduate students of V.N. Karazin Kharkiv National University.

References

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Published

2021-04-07

How to Cite

Siusko, Y., Svoboda, V., Stockel, J., Garkusha, I., Solyakov, D., Girka, I., Volkov, V., Bondar, D., Kondratenko, V., Boychenko, A., Krupka, A., Boloto, D., Drozdov, D., Salmin, O., & Shchibrya, A. (2021). Breakdown Phase in the GOLEM Tokamak and Its Impact on Plasma Performance. Ukrainian Journal of Physics, 66(3), 231. https://doi.org/10.15407/ujpe66.3.231

Issue

Vol. 66 No. 3 (2021)

Section

Plasma physics

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