Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning

the W7-X Team

doi:10.1016/j.fusengdes.2017.05.019

Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning

the W7-X Team

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	303-308
Number of pages	6
Journal	Fusion Engineering and Design
Volume	123
DOIs	https://doi.org/10.1016/j.fusengdes.2017.05.019
Publication status	Published - Nov 2017

Keywords

Fast particle generation
Heating
ICRH antenna
W7-X
Wall conditioning

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10.1016/j.fusengdes.2017.05.019

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title = "Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning",

abstract = "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.",

keywords = "Fast particle generation, Heating, ICRH antenna, W7-X, Wall conditioning",

author = "{the W7-X Team} and B. Schweer and J. Ongena and V. Borsuk and D. Birus and S. Bozhenkov and Bardawil, {D. Casta{\~n}o} and F. Durodi{\'e} and D. Hartmann and Hollfeld, {K. P.} and P. Kallmeyer and A. Krivska and F. Louche and A. Messiaen and O. Neubauer and G. Offermanns and G. Satheeswaran and {Van Schoor}, M. and M. Vervier and R. Wolf",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = nov,

doi = "10.1016/j.fusengdes.2017.05.019",

language = "English",

volume = "123",

pages = "303--308",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

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AU - the W7-X Team

AU - Schweer, B.

AU - Ongena, J.

AU - Borsuk, V.

AU - Birus, D.

AU - Bozhenkov, S.

AU - Bardawil, D. Castaño

AU - Durodié, F.

AU - Hartmann, D.

AU - Hollfeld, K. P.

AU - Kallmeyer, P.

AU - Krivska, A.

AU - Louche, F.

AU - Messiaen, A.

AU - Neubauer, O.

AU - Offermanns, G.

AU - Satheeswaran, G.

AU - Van Schoor, M.

AU - Vervier, M.

AU - Wolf, R.

PY - 2017/11

Y1 - 2017/11

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AB - 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.

KW - Fast particle generation

KW - Heating

KW - ICRH antenna

KW - W7-X

KW - Wall conditioning

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JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning

Abstract

Keywords

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