Magnetic Control of a Charge-neutralized Ion Beam

Abstract

Charge-neutralized ion beam control is more complex than control of charged beams. While focusing techniques for charged beams have been widely studied, many of the tools available for controlling charged beams are not suitable for chargeneutralized beams. Presented here is a scheme for controlling charge-neutralized beams using a distortion of a magnetic guide field via the presence of two current carrying wires. The extent to which the beam can be controlled is evaluated using a classical trajectory Monte Carlo simulation.

Magnetic plasma expulsion

“…The purpose of magnetic plasma expulsion is to keep plasma from entering a given boundary, in contrast to magnetic plasma confinement, which seeks to contain plasma within a given boundary. The concept of magnetic plasma expulsion presented here is related to work recently reported for control of space charged neutralized ion beams, 1 though early studies were conducted in a fusion plasma context. 2 When used in conjunction with magnetic plasma confinement, magnetic plasma expulsion may allow the insertion of instrumentation into a magnetically confined plasma without adversely affecting the confinement properties or purity of the confined plasma.…”