Experiment of magnetic island formation in Large Helical Device

Y. Nagayama; K. Narihara; Y. Narushima; N. Ohyabu; T. Hayashi; K. Ida; Inagaki Shigeru; D. Kalinina; R. Kanno; A. Komori; T. Morisaki; R. Sakamoto; S. Sudo; N. Tamura; T. Tokuzawa; H. Yamada; M. Yoshinuma

doi:10.1088/0029-5515/45/8/016

Experiment of magnetic island formation in Large Helical Device

Y. Nagayama, K. Narihara, Y. Narushima, N. Ohyabu, T. Hayashi, K. Ida, Inagaki Shigeru, D. Kalinina, R. Kanno, A. Komori, T. Morisaki, R. Sakamoto, S. Sudo, N. Tamura, T. Tokuzawa, H. Yamada, M. Yoshinuma

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

9 Citations (Scopus)

Abstract

Magnetic island formation is experimentally investigated in the Large Helical Device. The (m, n) ≤ (1, 1) vacuum magnetic island is generated by using the local island diverter field, where m and n are the poloidal and toroidal mode numbers, respectively. The island width depends on plasma parameters (the electron temperature and the β) and the magnetic axis position. In the case of R_ax ≤ 3.53 m the magnetic island in the plasma is larger than that in the vacuum field. Here, R_ax is the major radius of the magnetic axis. In the case of R_ax ≤ 3.6 m the magnetic island is not generated when the error field is less than the threshold which is increased as the β is increased. Evidence of island current is obtained when the magnetic island is formed due to a small error field. However, the mechanism that generates the island is not yet known.

Original language	English
Pages (from-to)	888-893
Number of pages	6
Journal	Nuclear Fusion
Volume	45
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/45/8/016
Publication status	Published - Aug 1 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/0029-5515/45/8/016

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@article{132ae129ca6c433189f63888f2921a17,

title = "Experiment of magnetic island formation in Large Helical Device",

abstract = "Magnetic island formation is experimentally investigated in the Large Helical Device. The (m, n) ≤ (1, 1) vacuum magnetic island is generated by using the local island diverter field, where m and n are the poloidal and toroidal mode numbers, respectively. The island width depends on plasma parameters (the electron temperature and the β) and the magnetic axis position. In the case of Rax ≤ 3.53 m the magnetic island in the plasma is larger than that in the vacuum field. Here, Rax is the major radius of the magnetic axis. In the case of Rax ≤ 3.6 m the magnetic island is not generated when the error field is less than the threshold which is increased as the β is increased. Evidence of island current is obtained when the magnetic island is formed due to a small error field. However, the mechanism that generates the island is not yet known.",

author = "Y. Nagayama and K. Narihara and Y. Narushima and N. Ohyabu and T. Hayashi and K. Ida and Inagaki Shigeru and D. Kalinina and R. Kanno and A. Komori and T. Morisaki and R. Sakamoto and S. Sudo and N. Tamura and T. Tokuzawa and H. Yamada and M. Yoshinuma",

year = "2005",

month = aug,

day = "1",

doi = "10.1088/0029-5515/45/8/016",

language = "English",

volume = "45",

pages = "888--893",

journal = "Nuclear Fusion",

issn = "0029-5515",

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TY - JOUR

T1 - Experiment of magnetic island formation in Large Helical Device

AU - Nagayama, Y.

AU - Narihara, K.

AU - Narushima, Y.

AU - Ohyabu, N.

AU - Hayashi, T.

AU - Ida, K.

AU - Shigeru, Inagaki

AU - Kalinina, D.

AU - Kanno, R.

AU - Komori, A.

AU - Morisaki, T.

AU - Sakamoto, R.

AU - Sudo, S.

AU - Tamura, N.

AU - Tokuzawa, T.

AU - Yamada, H.

AU - Yoshinuma, M.

PY - 2005/8/1

Y1 - 2005/8/1

N2 - Magnetic island formation is experimentally investigated in the Large Helical Device. The (m, n) ≤ (1, 1) vacuum magnetic island is generated by using the local island diverter field, where m and n are the poloidal and toroidal mode numbers, respectively. The island width depends on plasma parameters (the electron temperature and the β) and the magnetic axis position. In the case of Rax ≤ 3.53 m the magnetic island in the plasma is larger than that in the vacuum field. Here, Rax is the major radius of the magnetic axis. In the case of Rax ≤ 3.6 m the magnetic island is not generated when the error field is less than the threshold which is increased as the β is increased. Evidence of island current is obtained when the magnetic island is formed due to a small error field. However, the mechanism that generates the island is not yet known.

AB - Magnetic island formation is experimentally investigated in the Large Helical Device. The (m, n) ≤ (1, 1) vacuum magnetic island is generated by using the local island diverter field, where m and n are the poloidal and toroidal mode numbers, respectively. The island width depends on plasma parameters (the electron temperature and the β) and the magnetic axis position. In the case of Rax ≤ 3.53 m the magnetic island in the plasma is larger than that in the vacuum field. Here, Rax is the major radius of the magnetic axis. In the case of Rax ≤ 3.6 m the magnetic island is not generated when the error field is less than the threshold which is increased as the β is increased. Evidence of island current is obtained when the magnetic island is formed due to a small error field. However, the mechanism that generates the island is not yet known.

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U2 - 10.1088/0029-5515/45/8/016

DO - 10.1088/0029-5515/45/8/016

M3 - Article

AN - SCOPUS:23844493126

SN - 0029-5515

VL - 45

SP - 888

EP - 893

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

ER -

Experiment of magnetic island formation in Large Helical Device

Abstract

All Science Journal Classification (ASJC) codes

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