Experimental observation of response to resonant magnetic perturbation and its hysteresis in LHD

LHD Experiment Group

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The magnetic island in the large helical device (LHD) shows the dynamic behaviour of the healing/growth transition with the hysteretic behaviour. The thresholds of plasma beta and poloidal flow for island healing are larger than that for growth. The threshold of resonant magnetic perturbation (RMP) for healing is smaller than that for growth. Furthermore, thresholds of the amplitude of RMP depend on the magnetic axis position Rax in the LHD. The RMP threshold increases as the magnetic axis position Rax increases. The poloidal viscosity may be considered as a candidate to explain the experimental observation from the viewpoint of the relationship between the electromagnetic torque and the viscous torque.

Original languageEnglish
Article number073004
JournalNuclear Fusion
Volume55
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

Fingerprint

healing
hysteresis
perturbation
thresholds
torque
magnetic islands
viscosity
electromagnetism

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

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title = "Experimental observation of response to resonant magnetic perturbation and its hysteresis in LHD",
abstract = "The magnetic island in the large helical device (LHD) shows the dynamic behaviour of the healing/growth transition with the hysteretic behaviour. The thresholds of plasma beta and poloidal flow for island healing are larger than that for growth. The threshold of resonant magnetic perturbation (RMP) for healing is smaller than that for growth. Furthermore, thresholds of the amplitude of RMP depend on the magnetic axis position Rax in the LHD. The RMP threshold increases as the magnetic axis position Rax increases. The poloidal viscosity may be considered as a candidate to explain the experimental observation from the viewpoint of the relationship between the electromagnetic torque and the viscous torque.",
author = "{LHD Experiment Group} and Y. Narushima and S. Sakakibara and S. Ohdachi and Y. Suzuki and Watanabe, {K. Y.} and S. Nishimura and S. Satake and B. Huang and M. Furukawa and Y. Takemura and K. Ida and M. Yoshinuma and I. Yamada",
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Experimental observation of response to resonant magnetic perturbation and its hysteresis in LHD. / LHD Experiment Group.

In: Nuclear Fusion, Vol. 55, No. 7, 073004, 01.07.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental observation of response to resonant magnetic perturbation and its hysteresis in LHD

AU - LHD Experiment Group

AU - Narushima, Y.

AU - Sakakibara, S.

AU - Ohdachi, S.

AU - Suzuki, Y.

AU - Watanabe, K. Y.

AU - Nishimura, S.

AU - Satake, S.

AU - Huang, B.

AU - Furukawa, M.

AU - Takemura, Y.

AU - Ida, K.

AU - Yoshinuma, M.

AU - Yamada, I.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - The magnetic island in the large helical device (LHD) shows the dynamic behaviour of the healing/growth transition with the hysteretic behaviour. The thresholds of plasma beta and poloidal flow for island healing are larger than that for growth. The threshold of resonant magnetic perturbation (RMP) for healing is smaller than that for growth. Furthermore, thresholds of the amplitude of RMP depend on the magnetic axis position Rax in the LHD. The RMP threshold increases as the magnetic axis position Rax increases. The poloidal viscosity may be considered as a candidate to explain the experimental observation from the viewpoint of the relationship between the electromagnetic torque and the viscous torque.

AB - The magnetic island in the large helical device (LHD) shows the dynamic behaviour of the healing/growth transition with the hysteretic behaviour. The thresholds of plasma beta and poloidal flow for island healing are larger than that for growth. The threshold of resonant magnetic perturbation (RMP) for healing is smaller than that for growth. Furthermore, thresholds of the amplitude of RMP depend on the magnetic axis position Rax in the LHD. The RMP threshold increases as the magnetic axis position Rax increases. The poloidal viscosity may be considered as a candidate to explain the experimental observation from the viewpoint of the relationship between the electromagnetic torque and the viscous torque.

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