Accession Number : ADA300335

Title :   Nonlinear Particle Dynamics in the Magnetotail: A Laboratory Study 1. The Experimental Configuration and Numerical Simulation.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Walker, D. ; Bowles, J. ; Holland, D. ; Chen, J. ; Siefring, C.

PDF Url : ADA300335

Report Date : 25 SEP 1995

Pagination or Media Count : 70

Abstract : We have performed the initial stages of an experiment designed to investigate particle dynamics in the magnetotail. The experiment was developed for and performed in the large Space Physics Simulation Chamber (SPSC) at the Naval Research Laboratory. The results of this experiment lend support to the idea that particle scattering from the magnetotail neutral sheet is not random but that there exist resonances in the number and direction of scattered particles as a function of energy. The effort began with construction and testing of the magnetic field configuration necessary to simulate the quitetime magnetotail field: a neutral sheet magnetic field profile B0(z)x with a superimposed normal field B(2)z. Once complete, electrons of variable energy were injected into the field region created and the scattered current collected by back-scattered and forward-scattered collection plates was analyzed as a function of electron energy. The experiment was used to test the hypothesis that single particle scattering from a neutral sheet type profile as described can be "coherent" and can at times demonstrate resonance effects as a function of energy. (AN)

Descriptors :   *MAGNETIC FIELDS, *ELECTRON SCATTERING, *CHARGED PARTICLES, MATHEMATICAL MODELS, ALGORITHMS, COMPUTERIZED SIMULATION, GEOMAGNETISM, STOCHASTIC PROCESSES, PLASMAS(PHYSICS), RESONANCE SCATTERING, CURRENT DENSITY, BACKSCATTERING, ELECTRON BEAMS, ELECTRON ENERGY, NONLINEAR SYSTEMS, PROFILES, NUMERICAL METHODS AND PROCEDURES, MAGNETOSPHERE, PARTICLE COLLISIONS, PARTICLE FLUX, COHERENT SCATTERING.

Subject Categories : Electricity and Magnetism
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE