Study of non-linear coupling of fluctuations at long distance in LHD

S. Inagaki; T. Tokuzawa; T. Kobayashi; S. I. Itoh; K. Itoh; K. Ida; A. Fujisawa; S. Kubo; T. Shimozuma; N. Tamura; N. Kasuya; H. Tsuchiya; Y. Nagayama

doi:10.1088/0029-5515/54/11/114014

Study of non-linear coupling of fluctuations at long distance in LHD

S. Inagaki, T. Tokuzawa, T. Kobayashi, S. I. Itoh, K. Itoh, K. Ida, A. Fujisawa, S. Kubo, T. Shimozuma, N. Tamura, N. Kasuya, H. Tsuchiya, Y. Nagayama

Division of Nuclear Fusion Dynamics

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

11 Citations (Scopus)

Abstract

Non-linear coupling between fluctuations at different radial locations is observed on the Large Helical Device (LHD) plasma. The summed bi-coherence between the low frequency macro-scale fluctuation (frequency is f=2.75kHz) at ρ=r_eff/a₉₉=0.63 (where a₉₉ is averaged plasma radius) and the high-frequency micro-scale fluctuations (frequency range of f>150kHz) at ρ=0.88 is found to converge to a non-zero and finite value. The bi-phase analysis provides another basis for the non-linear interaction across the long distance. These results are associated with the violation local closure for transport relation.

Original language	English
Article number	114014
Journal	Nuclear Fusion
Volume	54
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/54/11/114014
Publication status	Published - Oct 1 2014

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

Access to Document

10.1088/0029-5515/54/11/114014

Cite this

@article{363fc47c481e4d29a0f86fccb0966b40,

title = "Study of non-linear coupling of fluctuations at long distance in LHD",

abstract = "Non-linear coupling between fluctuations at different radial locations is observed on the Large Helical Device (LHD) plasma. The summed bi-coherence between the low frequency macro-scale fluctuation (frequency is f=2.75kHz) at ρ=reff/a99=0.63 (where a99 is averaged plasma radius) and the high-frequency micro-scale fluctuations (frequency range of f>150kHz) at ρ=0.88 is found to converge to a non-zero and finite value. The bi-phase analysis provides another basis for the non-linear interaction across the long distance. These results are associated with the violation local closure for transport relation.",

author = "S. Inagaki and T. Tokuzawa and T. Kobayashi and Itoh, {S. I.} and K. Itoh and K. Ida and A. Fujisawa and S. Kubo and T. Shimozuma and N. Tamura and N. Kasuya and H. Tsuchiya and Y. Nagayama",

note = "Publisher Copyright: {\textcopyright} 2014 IAEA, Vienna.",

year = "2014",

month = oct,

day = "1",

doi = "10.1088/0029-5515/54/11/114014",

language = "English",

volume = "54",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "11",

}

TY - JOUR

T1 - Study of non-linear coupling of fluctuations at long distance in LHD

AU - Inagaki, S.

AU - Tokuzawa, T.

AU - Kobayashi, T.

AU - Itoh, S. I.

AU - Itoh, K.

AU - Ida, K.

AU - Fujisawa, A.

AU - Kubo, S.

AU - Shimozuma, T.

AU - Tamura, N.

AU - Kasuya, N.

AU - Tsuchiya, H.

AU - Nagayama, Y.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Non-linear coupling between fluctuations at different radial locations is observed on the Large Helical Device (LHD) plasma. The summed bi-coherence between the low frequency macro-scale fluctuation (frequency is f=2.75kHz) at ρ=reff/a99=0.63 (where a99 is averaged plasma radius) and the high-frequency micro-scale fluctuations (frequency range of f>150kHz) at ρ=0.88 is found to converge to a non-zero and finite value. The bi-phase analysis provides another basis for the non-linear interaction across the long distance. These results are associated with the violation local closure for transport relation.

AB - Non-linear coupling between fluctuations at different radial locations is observed on the Large Helical Device (LHD) plasma. The summed bi-coherence between the low frequency macro-scale fluctuation (frequency is f=2.75kHz) at ρ=reff/a99=0.63 (where a99 is averaged plasma radius) and the high-frequency micro-scale fluctuations (frequency range of f>150kHz) at ρ=0.88 is found to converge to a non-zero and finite value. The bi-phase analysis provides another basis for the non-linear interaction across the long distance. These results are associated with the violation local closure for transport relation.

UR - http://www.scopus.com/inward/record.url?scp=84908520980&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908520980&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/54/11/114014

DO - 10.1088/0029-5515/54/11/114014

M3 - Article

AN - SCOPUS:84908520980

SN - 0029-5515

VL - 54

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 11

M1 - 114014

ER -

Study of non-linear coupling of fluctuations at long distance in LHD

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this