Accession Number : AD0451070


Title :   TRAPPING AND LOSS OF CHARGED PARTICLES IN A PERTURBED MAGNETIC FIELD,


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS


Personal Author(s) : Wingerson,R C ; Dupree,T H ; Rose,D J


Report Date : 14 May 1964


Pagination or Media Count : 10


Abstract : The properties of a nonadiabatic magnetic system for trapping and confining charged particles are derived. The trapping mechanism is a helical perturbation that matches the gyrations of an incoming particle beam. These particles, in resonance with the structure, convert their axial energy into transverse energy even in the absence of a magnetic mirror. By the same scheme, a spiraling beam could be straightened out. The best injection system is a fourconductor set, which is analyzed in detail. Once confined, the particles experience small and almost random nonadiabatic perturbations in their motion; they diffuse in both real and velocity space. A linear operator that governs this diffusion is presented; it is applicable to a uniform magnetic field with small perturbations. The velocity-space diffusion in a magnetic mirror is calculated for a general perturbation and in particular for a helical perturbation. For this last case, the injected particles can be confined for serval hundred axial transits. (Author)


Descriptors :   *CHARGED PARTICLES , MAGNETIC FIELDS , HELIXES , PERTURBATION THEORY , RESONANCE , MIRRORS , MOLECULAR BEAMS , ION BEAMS , PARTICLE TRAJECTORIES , USSR , UNITED KINGDOM , TOPOLOGY , DIFFERENTIAL GEOMETRY , PLASMAS(PHYSICS)


Distribution Statement : APPROVED FOR PUBLIC RELEASE