Mode competition in the 170 GHz coaxial gyrotron cavity for ITER

Author

Dumbrajs, Olgierd ; Avramides, Konstantinos A. ; Piosczyk, Bernhard

Author_Institution

Assoc. Euratom-Tekes, Helsinki Univ. of Technol., Helsinki

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

48

Lastpage

49

Abstract

170 GHz coaxial cavity gyrotrons with 2 MW output power in continuous wave (CW) operation are regarded as potential ECRH sources in ITER. A first industrial prototype of such a gyrotron has already been fabricated and delivered to CRPP Lausanne, where a suitable test facility has been constructed. Experimental tests are expected for the second half of this year. In view of the further development work, it is important to improve our understanding of the complicated processes of mode competition occurring in oversized coaxial cavities. An example of the comparison between the results obtained by means of four independent codes is presented and discrepancies between the theoretical end experimental results are discussed.

Keywords

gyrotrons; millimetre wave tubes; ECRH sources; ITER; coaxial cavities; coaxial gyrotron cavity; continuous wave operation; four independent codes; frequency 170 GHz; mode competition; power 2 MW; Coaxial components; Electron beams; Frequency; Geometry; Gyrotrons; Maxwell equations; Power generation; Q factor; Stationary state; Voltage; coaxial cavity; corrugations; gyrotron; mode competition;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-1438-3

Type

conf

DOI

10.1109/ICIMW.2007.4516389

Filename

4516389