Low power test of the ITER electron cyclotron equatorial launcher mock-up

Author

Fukunari, Masafumi ; Takahashi, Koichi ; Oda, Yuta ; Kajiwara, Kagemasa ; Sakamoto, Kazumitsu ; Omori, Tatsuya ; Henderson, Mike

Author_Institution

Univ. of Tokyo, Kashiwa, Japan

fYear

2013

fDate

1-6 Sept. 2013

Firstpage

1

Lastpage

2

Abstract

Beam propagation behavior of the ITER EC equatorial launcher mock-up was investigated at low power level. A 170 GHz, HE₁₁ mode generator was used as a beam source. Maximum intensity at the mirror-edge was -35 dB which was almost background level and no signal was obtained on the beamduct wall. Assuming a radiation from the waveguide nearest to the wall an intensity profile on the beam-duct wall was estimated, the maximum intensity on the beam-duct wall and at the mirror-edge were a level of -40 dB, and of -13dB, respectively. At outlet of the EL mock-up, single peak radiation profile was confirmed and the beam center was located as designed. The peak intensity of the side lobes were about -20 dB which is reasonably small.

Keywords

Tokamak devices; plasma electromagnetic wave propagation; plasma filled waveguides; plasma radiofrequency heating; plasma toroidal confinement; HE₁₁ mode generator; ITER electron cyclotron equatorial launcher mock-up; beam center; beam propagation behavior; beam source; beam-duct wall; frequency 170 GHz; intensity profile; low power test; maximum intensity; mirror-edge; single peak radiation profile;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on

Conference_Location

Mainz

Type

conf

DOI

10.1109/IRMMW-THz.2013.6665681

Filename

6665681