Observation of filaments in the Globus-M tokamak via Doppler reflectometry

摘要

Plasma edge turbulence in a tokamak often manifests itself by the developing of filament structures observed during edge localized mode (ELM) and inter-ELM periods [1]. The filament like density perturbations are assumed to play an important role in peripheral transport. So the filaments are intensively investigated with the using of different methods such as fast camera images, reciprocating Langmuir probes, multi-pulse edge Thomson scattering. In this report the data concerning the filaments in the Globus-M tokamak are presented as a result of first application of Doppler reflectometry (DR) in a spherical tokamak.