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Perturbative experiments have been carried out in the Joint European Torus [Fusion Sci. Technol. 53(4) (2008)] in order to identify the diffusive and convective components of toroidal momentum transport. The torque source was modulated either by modulating tangential neutral beam power or by modulating in antiphase tangential and normal beams to produce a torque perturbation in the absence of a power perturbation. The resulting periodic perturbation in the toroidal rotation velocity was modeled using time-dependent transport simulations in order to extract empirical profiles of momentum diffusivity and pinch. Details of the experimental technique, data analysis, and modeling are provided. The momentum diffusivity in the core region (0.2
Original languageEnglish
JournalPhysics of Plasmas
Volume17
Issue number9
Pages (from-to)092505
ISSN1070-664X
DOIs
StatePublished - 2010
Peer-reviewedYes
CitationsWeb of Science® Times Cited: 10

Keywords

  • Fusion energy
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