Collective focusing ion accelerator

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5334210

Goldin, F J

The principal subject of this dissertation is the trapping confinement of pure electron plasmas in bumpy toroidal magnetic fields, with particular attention given to the trapping procedure and the behavior of the plasma during the final equilibrium. The most important aspects of the equilibrium studied were the qualitative nature of the plasma configuration and motion and its density, distribution and stability. The motivation for this study was that an unneutralized cloud of electrons contained in a toroidal system, sufficiently dense and stable, may serve to electrostatically focus ions (against centrifugal and self space charge forces) in a cyclic ion accelerator. Such an accelerator, known as a Collective Focusing Ion Accelerator (CFIA) could be far smaller than conventional designs (which use external magnetic fields directly to focus the ions) due to the smaller gyro-radium of an electron in a magnetic field of given strength. The electron cloud generally drifted poloidally at a finite radius from the toroidal minor axis. As this would preclude focusing ions with such clouds, damping this motion was investigated. Finite resistance in the normally perfectly conductive vessel wall did this. In further preparation for a working CFIA, additional experiments studied the effect of ions on the stability of the electron cloud.

• Research Organization: California Univ., Irvine (USA)
• OSTI ID: 5334210
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
CLOSED PLASMA DEVICES
CLOUDS
CONFINEMENT
CYCLIC ACCELERATORS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FOCUSING
ION SOURCES
LEPTONS
PINCH DEVICES
PLASMA CONFINEMENT
THERMONUCLEAR DEVICES
TOROIDAL PINCH DEVICES
TRAPPING