Psfc/ja-97-6 Lower Bound in Energy for Chaotic Dynamics of Ions

Psfc/ja-08-25 Chaotic Magnetic Fields Due to Asymmetric Current Configurations – Modeling Cross-field Particle Diffusion in Cosmic Rays

PSFC/JA-03-02 Superconducting options for final optics magnets for the Heavy Ion Driver in Inertial Fusion Energy

The environment close to the chamber in inertial fusion confinement imposes severe constrains on magnets used for final focusing magnets needed for the heavy ion driver. Space is at a premium, requiring close proximity of adjacent magnets, making magnet integration imperative. In addition, the high radiation flux and heating rate imposes requirements that are as stringent as in magnetic fusion....

Ion Dynamics in Multiple Electrostatic Waves in a Magnetized Plasma

A general theoretical study of the dynamics of ions interacting with multiple elec-trostatic waves, propagating perpendicularly to a uniform magnetic field, is performed. For appropriately chosen frequencies and wavenumbers we discover a new nonlinear phenomenon of coherent acceleration (or deceleration) which energizes (or extracts energy from) ions. Ions whose initial energies are below the l...

Variational Calculation of Neoclassical Ion Heat Flux in the Banana Regime for Axisymmetric Magnetic Geometry

This work was supported by the U.S. Department of Energy, Grant No. DE-FG02-91ER54109 . Reproduction, translation, publication, use and disposal, in whole or in part, by or for the United States government is permitted. Submitted for publication in Plasma Physics and Controlled Fusion (2011) PSFC/JA-11-39 Variational Calculation of Neoclassical Ion Heat Flux in the Banana Regime for Axisymmetri...

Interaction of Ions with a Spectrum of Electrostatic Waves

A single electrostatic, lower-hybrid wave, propagating across a magnetic eld,can energize ions only if the ion dynamics becomes chaotic [1]. We show that low energy ions, which would not gain energy from a single wave, can gain energy from two or more waves provided the wavelengths and frequencies are chosen appropriately. An appropriate choice can also lead to an extraction of ion energy by th...