"Dimitrova, Miglena" . "Fernandes, H." . . "Gyergyek, T." . . "[03A7F1A9A5AC]" . "I, P(GAP205/12/2327), P(LM2011021)" . "10"^^ . "Determination of the plasma parameters in the ISTTOK tokamak(IWSSPP2014)"@en . . . "Dimitrova, Miglena" . "St\u00F6ckel, Jan" . "RIV/61389021:_____/14:00430539!RIV15-GA0-61389021" . . "P\u0159edneseno 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" . . . . "Silva, C." . "Determination of the plasma parameters in the ISTTOK tokamak(IWSSPP2014)"@en . . "Duarte, P." . "RIV/61389021:_____/14:00430539" . . "P\u0159edneseno 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"@en . "tokamak edge plasma; plasma potential; electron energy distribution function; electron temperatura and density; first-derivative probe technique"@en . "Determination of the plasma parameters in the ISTTOK tokamak(IWSSPP2014)" . . "P\u00E1nek, Radom\u00EDr" . "Nedzelskiy, I." . . . "10843" . . . "3"^^ . . "Popov, Tsv.K." . "Kova\u010Di\u010D, J." . "Determination of the plasma parameters in the ISTTOK tokamak(IWSSPP2014)" . . . . .