Abstract Details
Abstracts
Author: Timothy Stoltzfus-Dueck
Requested Type: Poster
Submitted: 2025-03-14 12:18:47
Co-authors: F. I. Parra
Contact Info:
PPPL
100 Stellarator Rd
Princeton, NJ 08540
USA
Abstract Text:
One practical challenge for the centrifugal-mirror confinement concept is the large radial voltage necessary to drive supersonic azimuthal rotation. In principle, the addition of a strong azimuthal field could reduce the required voltage, since the simple azimuthal ExB drift would be replaced by more rapid azimuthal trapped-particle precession. Also, if the mirror ratio is large enough, newly-ionized ions are accelerated to the necessary parallel velocities in their first bounce orbit, both confining and significantly heating them. Unfortunately, MHD analysis shows that the centrifugal-force-confining plasma current is purely azimuthal. This implies that only the axial magnetic field contributes to the confining magnetic pressure, severely limiting the usefulness of the azimuthal magnetic field in a beta-limited plasma scenario.
Characterization: 1.0
Comments: