Tokamak. / Edge plasmas. / Edge region. / Electron densities. / Electron energy distribution functions. / First derivative. / Ion density. / Local measurement. / Plasma parameter. / Plasma potential. / Radial position. / Scrape-off layer. / Current voltage characteristics. / Dissociation. / Distribution functions. / Electric power distribution. / Electron energy analyzers. / Electron energy levels. / Fusion reactors. / Ion beams. / Langmuir probes. / Plasma density. / Plasma devices. / Plasma turbulence. / Probes. / Electron temperature.