|TORIC Full wave RF mode conversion
Research in the Fusion Theory Group is performed in support of the
national and international magnetic fusion programs, as well as the
(C-Mod) and the Levitated Dipole Experiment (LDX).
This research is
is divided into four major areas:
(Click the titles below for information on current research activities
in each area)
Magnetohydrodynamics (MHD) describes a plasma as a current carrying
fluid interacting with electromagnetic fields. In single fluid MHD all
species have the same lowest order flow velocity, with any small differences
accounting for the current. In multi-fluid or extended MHD the species
flow velocities are independent and finite gyroradius effects are retained.
Radio frequency waves in different frequency regimes can be used to heat
plasma to fusion relevant temperatures, and to generate plasma currents. They
can also be used to modify the current profile to control some MHD instabilities
and improve confinement.
Plasma wave induced micro-turbulence as well as collisional transport impact
confinement in toroidal plasma confinement devices. The interplay of turbulence,
collisions, and plasma edge phenomena determine attainable pressures, and
hence fusion power, in magnetic fusion relevant plasmas.
The Levitated Dipole Experiment (LDX) represents a novel alternate path to
fusion and provides a controlled laboratory setting for studying dipole
magnetic field confined plasmas. Other non-tokamak geometries such as Z-pinches,
stellarators and reversed field pinches are are also being investigated.