9 papers
Constraints on the magnetic field evolution in tokamak power plants
Allen H Boozer
Forty-five years ago a coordinate system was shown to exist that gave simple but exact expressions whenever and wherever a toroidal plasma equilibrium $\vec{\nabla}p=\vec{j}\times\…
Magnetic Field Line Chaos, Cantori, and Turnstiles in Toroidal Plasmas
Allen H Boozer
The mathematical concepts of chaos, cartori, and turnstiles underlie a number of areas of tokamak and stellarator physics. Nevertheless, these concepts have seldom explicitly appea…
Electron Inertia and Magnetic Reconnection
Allen H Boozer
When electron inertia is the only non-ideal effect in the evolution of a magnetic field , the field lines of reconnect, but the lines of a related field $\vec{\m…
The subtlety of the outermost stellarator magnetic surface
Alkesh Punjabi, Allen H. Boozer
An analytic model of the magnetic field line behavior in a stellarator is used to study the subtlety of the concept of an outermost magnetic surface. The analytic model that we use…
Magnetic reconnection and dynamos in the presence of plasma turbulence
Allen H Boozer
Evolving magnetic fields are frequently embedded in plasmas that are turbulent. When the primary interest is in effects that are on a large scale compared to that of the turbulence…
Efficient analysis of magnetic field line behavior in toroidal plasmas
Allen H Boozer
The confinement of plasmas in tokamaks and stellarators depends on magnetic field lines lying in nested toroidal surfaces. The transition near the plasma edge away from the lines l…