This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1016/j.fusengdes.2017.05.019 in citations.
Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning
Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning
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 t...
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Personal Name(s): | Schweer, B. (Corresponding author) |
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Borsuk, V. / Durodier, F. / Ongena, J. / Vervier, M. / Louche, F. / Messian, A. / Hartmann, D. / Hollfeld, K. P. / Neubauer, O. / Offermanns, G. | |
Contributing Institute: |
Plasmaphysik; IEK-4 Zentralinstitut für Technologie; ZEA-1 |
Published in: | Fusion engineering and design, 123 (2017) S. 303-308 |
Imprint: |
New York, NY [u.a.]
Elsevier
2017
|
DOI: |
10.1016/j.fusengdes.2017.05.019 |
Conference: | 29th Symposium on Fusion Technology (SOFT 2016), Prague (Czech Republic), 2016-09-05 - 2016-09-09 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Publikationsportal JuSER |
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. |