title: Experimental observation of electron-temperature-gradient turbulence in a laboratory plasma.
abstract: We report the observation of electron-temperature-gradient (ETG) driven turbulence in the laboratory plasma of a large volume plasma device. The removal of unutilized primary ionizing and nonthermal electrons from uniform density plasma and the imposition and control of the gradient in the electron temperature (T[Symbol: see text] T(e)) are all achieved by placing a large (2 m diameter) magnetic electron energy filter in the middle of the device. In the dressed plasma, the observed ETG turbulence in the lower hybrid range of frequencies ν = (1-80 kHz) is characterized by a broadband with a power law. The mean wave number k perpendicular ρ(e) = (0.1-0.2) satisfies the condition k perpendicular ρ(e) ≤ 1, where ρ(e) is the electron Larmor radius.
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar 382 428, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Mattoo
authors.forename: S K
authors.initials: SK
authors.lastname: Singh
authors.forename: L M
authors.initials: LM
authors.lastname: Awasthi
authors.forename: R
authors.initials: R
authors.lastname: Singh
authors.forename: P K
authors.initials: PK
authors.lastname: Kaw