Improvement of ICRF antenna loading by local gas injection on ASDEX Upgrade

P. Jacquet; V. Bobkov; M. L. Mayoral; I. Monakhov; J. M. Noterdaeme; A. Scarabosio; I. Stepanov; Mark Vrancken; E. Wolfrum

doi:10.1088/0029-5515/52/4/042002

Improvement of ICRF antenna loading by local gas injection on ASDEX Upgrade

P. Jacquet, V. Bobkov, M. L. Mayoral, I. Monakhov, J. M. Noterdaeme, A. Scarabosio, I. Stepanov, Mark Vrancken, E. Wolfrum

Laboratory for Plasma Physics

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

Abstract

Local gas injection has recently been tested as a tool to improve coupling of ion cyclotron range of frequency (ICRF) waves to tokamak plasmas, which relies on the tunnelling of the fast wave between the antenna structure and the cut-off layer within the plasma. It is found that antenna loading resistance is substantially increased when using a local gas inlet at a deuterium gas injection rate of 5×10 ²¹els ^-1 or higher, and that the proximity of the gas inlet to the antenna is the key factor to optimize the improvement in coupling due to gas injection.

Original language	English
Article number	042002
Journal	Nuclear Fusion
Volume	52
Issue number	4
DOIs	https://doi.org/10.1088/0029-5515/52/4/042002
Publication status	Published - Apr 2012

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abstract = "Local gas injection has recently been tested as a tool to improve coupling of ion cyclotron range of frequency (ICRF) waves to tokamak plasmas, which relies on the tunnelling of the fast wave between the antenna structure and the cut-off layer within the plasma. It is found that antenna loading resistance is substantially increased when using a local gas inlet at a deuterium gas injection rate of 5×10 21els -1 or higher, and that the proximity of the gas inlet to the antenna is the key factor to optimize the improvement in coupling due to gas injection.",

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T1 - Improvement of ICRF antenna loading by local gas injection on ASDEX Upgrade

AU - Jacquet, P.

AU - Bobkov, V.

AU - Mayoral, M. L.

AU - Monakhov, I.

AU - Noterdaeme, J. M.

AU - Scarabosio, A.

AU - Stepanov, I.

AU - Vrancken, Mark

AU - Wolfrum, E.

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AB - Local gas injection has recently been tested as a tool to improve coupling of ion cyclotron range of frequency (ICRF) waves to tokamak plasmas, which relies on the tunnelling of the fast wave between the antenna structure and the cut-off layer within the plasma. It is found that antenna loading resistance is substantially increased when using a local gas inlet at a deuterium gas injection rate of 5×10 21els -1 or higher, and that the proximity of the gas inlet to the antenna is the key factor to optimize the improvement in coupling due to gas injection.

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JO - Nuclear Fusion

JF - Nuclear Fusion

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ER -

Improvement of ICRF antenna loading by local gas injection on ASDEX Upgrade

Abstract

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