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 () 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 is characterized by a broadband with a power law. The mean wave number satisfies the condition , where is the electron Larmor radius.
- Received 11 April 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.255007
© 2012 American Physical Society