%0 Journal Article
%A Schweer, B.
%A Borsuk, V.
%A Durodier, F.
%A Ongena, J.
%A Vervier, M.
%A Louche, F.
%A Messian, A.
%A Hartmann, D.
%A Hollfeld, K. P.
%A Neubauer, O.
%A Offermanns, G.
%T Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning
%J Fusion engineering and design
%V 123
%@ 0920-3796
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2017-06342
%P 303-308
%D 2017
%X An ICRH antenna system is under construction to be ready for use in the operational phase 1.2 of W7-X. A two strap antenna, with a surface adapted to the 3D shape of the Last Closed Flux Surface (LCFS) of the standard magnetic configuration (m/n = 5/5), will be installed in the equatorial plane on the low field side of W7-X. The antenna system is optimised for plasma heating and wall conditioning in presence of the magnetic field in the frequency range 25–38 MHz. Each strap is short-circuited on one end, is pre-matched using a tunable capacitor on the other end with connection to the RF power source about halfway in the poloidal direction. To allow optimal coupling to different magnetic configurations in W7-X the antenna can be moved radially over a distance of 350 mm. The cooling circuits in the antenna head are designed to sustain cw W7-X plasma operation in a retracted position and 2 MW ICRH pulses with maximum 10 s duration every 300 s close to the LCFS.
%B 29th Symposium on Fusion Technology (SOFT 2016)
%C 5 Sep 2016 - 9 Sep 2016, Prague (Czech Republic)
Y2 5 Sep 2016 - 9 Sep 2016
M2 Prague, Czech Republic
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000418992000060
%R 10.1016/j.fusengdes.2017.05.019
%U https://juser.fz-juelich.de/record/837417