Heat pulse propagation across the rational surface in a large helical device plasma with counter-neutral beam injection

M. Yakovlev, S. Inagaki, T. Shimozuma, S. Kubo, T. Morisaki, Y. Nagayama, K. Kawahata, A. Komori

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Core electron temperature profile flattening is observed in a large helical device [A. Iiyoshi Nucl. Fusion 39, 1245 (1999)] inward shifted plasma with counter-neutral beam injection. To study this phenomenon, heat pulse experiments are performed by on-axis electron cyclotron heating power modulation. A unique feature of heat pulse propagation is observed near the mn=21 rational surface (m, n are the poloidal and toroidal mode numbers, respectively). A simultaneous response of the temperature perturbation on radially separated flux surfaces is shown. The change in the magnetic field topology due to the presence of a magnetic island structure can explain this nonmonotonic heat pulse propagation. The estimated O-point position of the island is located near the mn=21 rational surface.

Original languageEnglish
Article number092506
Pages (from-to)1-6
Number of pages6
JournalPhysics of Plasmas
Volume12
Issue number9
DOIs
Publication statusPublished - Sep 1 2005
Externally publishedYes

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beam injection
neutral beams
counters
heat
propagation
pulses
electron cyclotron heating
magnetic islands
flattening
temperature profiles
topology
fusion
electron energy
modulation
perturbation
magnetic fields
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Heat pulse propagation across the rational surface in a large helical device plasma with counter-neutral beam injection. / Yakovlev, M.; Inagaki, S.; Shimozuma, T.; Kubo, S.; Morisaki, T.; Nagayama, Y.; Kawahata, K.; Komori, A.

In: Physics of Plasmas, Vol. 12, No. 9, 092506, 01.09.2005, p. 1-6.

Research output: Contribution to journalArticle

Yakovlev, M, Inagaki, S, Shimozuma, T, Kubo, S, Morisaki, T, Nagayama, Y, Kawahata, K & Komori, A 2005, 'Heat pulse propagation across the rational surface in a large helical device plasma with counter-neutral beam injection', Physics of Plasmas, vol. 12, no. 9, 092506, pp. 1-6. https://doi.org/10.1063/1.2044447
Yakovlev, M. ; Inagaki, S. ; Shimozuma, T. ; Kubo, S. ; Morisaki, T. ; Nagayama, Y. ; Kawahata, K. ; Komori, A. / Heat pulse propagation across the rational surface in a large helical device plasma with counter-neutral beam injection. In: Physics of Plasmas. 2005 ; Vol. 12, No. 9. pp. 1-6.
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AU - Kawahata, K.

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