Accession Number : ADA315613

Title :   Investigation of Charged Particle Dynamics in Electromagnetic Fields.

Descriptive Note : Final technical rept. 1 Jul 92-30 Jun 96,

Corporate Author : TEXAS TECH UNIV LUBBOCK DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Axton, C. K. ; Ishihara, O. ; Maston, J. ; Tyson, V. ; Zieher, K. W.

PDF Url : ADA315613

Report Date : 30 AUG 1996

Pagination or Media Count : 22

Abstract : Photon interaction with plasma turbulence induced by relativistic beam-plasma instability was stud by the 2 and 1/2 D particle simulation code MAGIC. The relativistic beam induced the instability through coupling between the beam plasma mode and an electromagnetic mode resulting in electromagnetic turbulence. The observed growth rate of the instability, as a function of beam velocity and wave vector, agreed well with the linear theory. Harmonic generation is observed in the simulation at the second harmonic. Harmonic generation falls off for frequencies above the electron plasma frequency. Harmonic generation falls of for a relativistic factor of the beam above 3. The electron dynamics in a relativistic Iclystron scheme was investigated using the same code MAGIC. The bunching of the injected electron beam was achieved by periodic deflection of the electron beam and subsequent deflection by 270 degrees in a static magnetic field. The simulation achieved oscillation of the system with a single-cell cavity. A single-cell cavity resonator was constructed and investigated experimentally. It achieve--a qualifactor of Q = 7800 after silver brazing the parts.

Descriptors :   *COMPUTER PROGRAMS, *COMPUTERIZED SIMULATION, *ELECTROMAGNETIC FIELDS, *CHARGED PARTICLES, VELOCITY, FREQUENCY, MAGNETIC FIELDS, INTERACTIONS, DYNAMICS, GROWTH(GENERAL), PLASMAS(PHYSICS), THEORY, DEFLECTION, RATES, TURBULENCE, CAVITIES, ELECTRONS, ELECTRON BEAMS, LINEARITY, PHOTONS, OSCILLATION, STATICS, ELECTROMAGNETISM, BEAMS(RADIATION), INSTABILITY, SILVER, BRAZING, CAVITY RESONATORS, ELECTRODYNAMICS, HARMONIC GENERATORS.

Subject Categories : Computer Programming and Software
      Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE