Skip to main content
eScholarship
Open Access Publications from the University of California

An investigation of beam driven alfvén instabilities in the diii-d tokamak

  • Author(s): Heidbrink, WW
  • Strait, EJ
  • Doyle, E
  • Sager, G
  • Snider, RT
  • et al.
Abstract

Neutral beams were injected into low field (B = 0.7-1.0 T) deuterium plasmas in an attempt to destabilize toroidicity induced Alfvén eigenmodes (TAE modes). When the parallel beam velocity approached the Alfvén velocity and the volume averaged beam beta exceeded 2%, localized, propagating modes with n = 2-10 were observed. As much as 45% of the beam power was lost as a result of the modes. The threshold for TAE instability is at least one order of magnitude higher than that predicted by Fu and VanDam (Phys. Fluids B 1 (1989) 1949). © 1991, IOP publishing Ltd.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View