Electron energy distribution function in the divertor region of the COMPASS tokamak

0460266 - ÚFP 2017 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Dimitrova, Miglena - Hasan, E. - Ivanova, P. - Vasileva, E. - Popov, T. - Dejarnac, Renaud - Stöckel, Jan - Pánek, Radomír
Electron energy distribution function in the divertor region of the COMPASS tokamak.
Journal of Physics Conference Series. Vol. 700. Bristol: IOP Publishing, Ltd., 2016, s. 012009. IOPscience. ISSN 1742-6588. E-ISSN 1742-6596.
[International Summer School on Vacuum, Electron and Ion Technologies/19./. Sozopol (BG), 21.09.2015-25.09.2015]
Grant CEP: GA MŠMT(CZ) LM2011021
Institucionální podpora: RVO:61389021
Klíčová slova: Divertor probes * H-mode * tungsten samples * electron energy distribution function * parallel power flux density
Obor OECD: Fluids and plasma physics (including surface physics)
http://iopscience.iop.org/article/10.1088/1742-6596/700/1/012009

The plasma parameters during an L-mode hydrogen discharge in the COMPASS tokamak with a toroidal magnetic field BT =1.15 T, line-averaged electron density ne = 6×1019 m−3 and a plasma current variation from 209 kA to 100 kA were studied in the divertor region. The electron energy distribution function for 209 kA at the high-field side and the private region is Maxwellian with a temperature in the range of 5 – 9 eV, while around the outer strike point and the low-field side it is bi-Maxwellian with a low-energy electron group (4 – 5 eV) and higher energy electrons (10 – 20 eV). As the plasma current decreases, the appearance of the bi-Maxwellian EEDF is shifted towards the low-field side; at plasma current of 100 kA, the EEDF is Maxwellian in the whole divertor region.
Trvalý link: http://hdl.handle.net/11104/0260391