Diamagnetism of rotating plasma

Abstract

Diamagnetism and magnetic measurements of a supersonically rotating plasma in a shaped magnetic field demonstrate confinement of plasma pressure along the magnetic field resulting from centrifugal force. The Grad-Shafranov equation of ideal magnetohydrodynamic force balance, including supersonic rotation, is solved to confirm that the predicted angular velocity is in agreement with spectroscopic measurements of the Doppler shifts.

Isorotation and differential rotation in a magnetic mirror with imposed E×B rotation

“…This displacement is being investigated with the aid of numerical simulations. 22 Results from these simulations indicate that R m increases by at most 10%, making it likely that the velocities reported here are indeed above u civ . Research is ongoing to extend the duration of the super-u civ phase beyond the 4.5-5.0 ms interval and will be reported elsewhere.…”

100 eV electron temperatures in the Maryland centrifugal experiment observed using electron Bernstein emission

“…Electron temperature is assumed to be constant along magnetic field lines, and the magnetic field is taken to be the vacuum magnetic field. 4 Based on an assumed electron temperature profile at midplane (z ¼ 0), the code assigns a temperature to each grid point. The temperature outside the rotating plasma is assumed to be zero.…”

“…1 A further benefit of the rotation is that the sheared velocity profile acts to stabilize the interchange instability and reduce radial transport. [1][2][3][4] The central electrode is isolated from the vacuum vessel by ceramic insulators at the two magnetic maxima, which prevent the plasma from line-tying to the vessel walls and allow rotation. The outermost flux surface, which is free to rotate, is referred to as the last good flux surface (LGFS).…”