Fast frequency-step-tunable high-power gyrotron with hybrid-magnet-system

Author

Koppenburg, Kai ; Dammertz, Günter ; Kuntze, Micheal ; Piosczyk, Bernard ; Thumm, Manfred

Author_Institution

Inst. fur Hochleistungsimpuls-und Mikrow-ellentech., EURATOM-FZK, Eggenstein-Leopoldshafen, Germany

Volume

48

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

101

Lastpage

107

Abstract

The TE_22,6 1 MW gyrotron operated at Forschungszentrum Karlsruhe (FZK) at frequencies between 114 and 166 GHz has been investigated with respect to the fast-frequency tunability in the frequency range from 132 to 147 GHz. For that purpose, the gyrotron has been equipped with a special hybrid-magnet system consisting of superconducting (sc) magnets in the cryostat and additional normal conducting (nc) copper magnets with a fast time constant. Some special problems due to the magnetic coupling between the different magnets were investigated by calculation and experiment. Making use of these investigations some different current regulation systems for the nc magnets were implemented and tested experimentally. Finally a step-tuning operation between the modes from TE_20,6 to TE_24,6 in time steps of 1 s has been achieved

Keywords

electromagnetic coupling; electromagnets; gyrotrons; superconducting magnets; tuning; 1 MW; 114 to 166 GHz; TE_20,6 mode; TE_22,6 mode; TE_24,6 mode; cryostat; current regulation systems; fast frequency-step-tunable high-power gyrotron; fast time constant; fast-frequency tunability; hybrid magnet system; magnetic coupling; normal conducting copper magnets; step-tuning operation; superconducting magnets; Frequency; Gyrotrons; Magnetic fields; Magnetic flux; Magnetic resonance; Plasma confinement; Plasma waves; Superconducting magnets; Tellurium; Tuning;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.892175

Filename

892175