Velocity ratio measurement diagnostics and simulations of a relativistic electron beam in an axis encircling gyrotron

Author

Jaynes, Reginald L. ; Gilgenbach, Ronald M. ; Hochman, Jonathan M. ; Eidietis, Nicholas ; Rintamaki, Josh I. ; Cohen, William E. ; Peters, Christopher W. ; Lau, Y.Y. ; Spencer, T.A.

Author_Institution

Dept. of Nucl. Eng. & Radiol. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

27

Issue

1

fYear

1999

fDate

2/1/1999 12:00:00 AM

Firstpage

136

Lastpage

137

Abstract

This paper reports on diagnostic experiments and simulations of a large-orbit, axis-encircling gyrotron. The electron´s perpendicular to parallel velocity ratio α is measured. The experimental diagnostic consists of an apertured portion of the beam which is passed through a cusped magnetic field then collected on a glass plate. The cross section of the beam is recorded on the glass plate in a radiation darkened pattern. From the gyro-radius, B-field, and beam energy, α can be calculated. Particle distributions of the radiation darkened plate are in excellent agreement with numerical simulations of single particle orbits derived from the relativistic equations of motion. The experimental measurement of α yields values from 0.9 to 1.4. The simulations predict an α of 1.0 to 1.5

Keywords

electron optics; gyrotrons; microwave tubes; particle beam diagnostics; plasma devices; relativistic electron beam tubes; relativistic electron beams; B-field; apertured portion; beam energy; cross section; cusped magnetic field; diagnostic experiments; gyro-radius; large-orbit axis-encircling gyrotron; perpendicular to parallel velocity ratio; radiation darkened pattern; relativistic electron beam; simulations; single particle orbits; Equations; Extraterrestrial measurements; Glass; Gyrotrons; Magnetic field measurement; Numerical simulation; Orbital calculations; Orbits; Predictive models; Velocity measurement;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.763091

Filename

763091