Determination of the plasma parameters in the ISTTOK tokamak(IWSSPP2014)

0430539 - ÚFP 2015 RIV BG eng O - Ostatní výsledky
Dimitrova, Miglena - Popov, Tsv.K. - Silva, C. - Fernandes, H. - Duarte, P. - Nedzelskiy, I. - Kovačič, J. - Gyergyek, T. - Stöckel, Jan - Pánek, Radomír
Determination of the plasma parameters in the ISTTOK tokamak(IWSSPP2014).
2014
Grant CEP: GA MŠMT(CZ) LM2011021; GA ČR(CZ) GAP205/12/2327
Institucionální podpora: RVO:61389021
Klíčová slova: tokamak edge plasma * plasma potential * electron energy distribution function * electron temperatura and density * first-derivative probe technique
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

Předneseno na:6th International Workshop and Summer School on Plasma Physics (IWSSPP2014),Kiten,BG,30.06.-06.07.2014, The first derivative probe technique was applied to study the ISTTOK tokamak plasma. This technique employs the electron part of the Langmuir probe current-voltage (IV) characteristic and yields information on the plasma potential and the electron energy distribution function (EEDF). The IV characteristic was measured with new electrical probes mounted on a horizontal manipulator, one oriented in parallel and the other perpendicularly to the magnetic field lines. Using the first-derivative probe technique,the plasma potential and the EEDF at different radial positions were acquired. We show that,in the vicinity of the last close flux surface (LCFS),the EEDF is non-Maxwellian and can be approximated by a bi-Maxwellian one with a dominant cold electron population and a minority group of hot electrons.In the limiter shadow, the EEDF obtained is Maxwellian.A comparison
Trvalý link: http://hdl.handle.net/11104/0235463