Journal of Plasma Physics

Papers

Turbulence changes from magnetic fields in a stationary plasma

A. B. ALEXANDERa1, C. T. RAYNORa1, D. L. WIGGINSa1, M. K. ROBINSONa1, C. C. AKPOVOa1 and J. A. JOHNSON IIIa1

a1 Center for Plasma Science and Technology, Florida A&M University, Tallahassee, FL 32310, USA (abalexander@cepast.famu.edu)

Abstract

When the krypton plasma in a DC glow discharge tube is exposed to an axial magnetic field, the turbulent energy and the characteristic dominant mode in the turbulent fluctuations are systematically and unexpectedly reduced with increasing magnetic field strength. When the index measuring the rate of transfer of energy through fluctuation scales is monitored, a lambda-like dependence on turbulent energy is routinely observed in all magnetic fields. From this, a critical turbulent energy is identified, which also decreases with increasing magnetic field strength.

(Received November 01 2010)

(Accepted November 29 2010)

(Online publication December 23 2010)