Turbulence in Toroidal Plasmas


Turbulent Transport

Objective: To study spatio-temporal structures and correlations in edge-layer turbulence

Significance: Low-temperature, simple-magnetized, toroidal plasmas provide a diagnosable boundary layer in which to investigate details of transport driven by turbulents and structures (clumps) within the turbulence. Insight and interpretation methods developed in these experimental devices are sought after by the magnetic-fusion community.

Long Range Goal: To characterize the influence of E x B velocity shear and parallel-velocity shear on the dynamical processes involved in turbulent transport.

Collaborators: Jeff Walker, Mark Koepke.


Spatiotemporal Plasma Turbulence

Objective: Compare complexity (intermittency, multi-fractality, transport), spatio-temporal structures, and correlations in space and fusion plasma turbulence.

Significance: Coupled plasma processes at micro- and macro-scopic scales within have similar scaling properties insensitive to the system’s specifics. Low-temperature plasma permits diagnostic access for investigating transport driven by turbulent fluctuations. Insight and interpretation methods developed in basic-physics toroidal plasma-confinement devices are sought after by the magnetic-fusion community.

Long Range Goal: To better understand the rich dynamics associated with the nonlinear equilibrium state that characterizes multi-coupled plasma quantities.

Collaborators: Stephanie Sears, Jeff Walker, Dimitris Vassiliadis, Mark Koepke

Bringing the Blue Torus into the lab.

Turbulent water flow. Image in the public domain.