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Turbulent Stresses in LAPD and CSDX

Author: Adam D Light
Requested Type: Poster Only
Submitted: 2011-06-12 15:56:27

Co-authors: Y. Sechrest, D.A. Schaffner, S.H. Muller, G.D. Rossi, D. Guice, T.A. Carter, G.R. Tynan, S. Vincena,T. Munsat

Contact Info:
University of Colorado
UCB 390
Boulder, CO   80309
United States

Abstract Text:
Turbulent momentum transport can affect phenomena as diverse as intrinsic rotation in self-organized systems, stellar dynamo, astrophysical accretion, and the mechanism of internal transport barriers in fusion devices. Contributions from turbulent fluctuations, in the form of Reynolds and Maxwell stress terms, have been predicted theoretically and observed on toroidal devices. In an effort to gain general insight into the physics, we present results from turbulent stress measurements on two linear devices: the LArge Plasma Device (LAPD) at the University of California, Los Angeles, and the Controlled Shear De-correlation eXperiment (CSDX) at the University of California, San Diego. Both experiments are well-characterized linear machines in which the plasma beta can be varied. Electrostatic and magnetic fluctuations are measured over a range of plasma parameters in concert with fast imaging. Maxwell and Reynolds stresses are calculated from probe data and fluctuations are compared with fast camera images using velocimetry techniques.

Characterization: D4,D5

Comments:

University of Washington

Workshop on Innovation in Fusion Science (ICC2011) and
US-Japan Workshop on Compact Torus Plasma
August 16-19, 2011
Seattle, Washington

ICC 2011