Investigations of microwave pulse shortening in a high power coaxial gyrotron

Author

Gilgenbach, R.M. ; Cohen, W.E. ; Peters, C.W. ; Lopez, M.R. ; Jaynes, R.L. ; Anderson, S.A. ; Lau, Y.Y. ; Brake, M.L. ; Williams, W.J. ; Spencer, T.A.

Author_Institution

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

fYear

2000

fDate

12-15 Sept. 2000

Firstpage

115

Lastpage

116

Abstract

Experiments have been performed on a coaxial gyrotron driven by the Michigan Electron Long Beam Accelerator (MELBA) at parameters: V=-0.8 MV, I=1-10 kA, and pulselength=0.5-1 microsecond. Microwave pulse shortening has been investigated by spectroscopic plasma diagnostics to characterize plasma effects inside the operating gyrotron. Radio-frequency plasma processing has been applied to clean the inside of the gyrotron in order to reduce the deleterious effects of plasma on the microwave pulselength and energy. Results show that plasma cleaning can extend the microwave pulselength and increase the integrated microwave energy output by 15-245% in this gyrotron.

Keywords

electron tube testing; gyrotrons; microwave tubes; plasma applications; plasma diagnostics; surface cleaning; -0.8 MV; 0.5 to 1 mus; 1 to 10 kA; MELBA driven gyrotron; Michigan Electron Long Beam Accelerator; RF plasma processing; high power coaxial gyrotron; microwave energy output; microwave pulse shortening; microwave pulselength; plasma cleaning; plasma deleterious effects reduction; plasma effects; radiofrequency plasma; spectroscopic plasma diagnostics; Coaxial components; Electron accelerators; Electron beams; Gyrotrons; Particle beams; Plasma accelerators; Plasma diagnostics; Plasma materials processing; Radio frequency; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on

Conference_Location

Beijing, China

Print_ISBN

0-7803-6513-5

Type

conf

DOI

10.1109/ICIMW.2000.892959

Filename

892959