Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System

H. Yamada, K. Ida, H. Iguchi, S. Morita, O. Kaneko, H. Arimoto, M. Hosokawa, H. Idei, S. Kubo, K. Matsuoka, K. Nishimura, S. Okamura, Y. Takeiri, Y. Takita, C. Takahashi, K. Hanatani, H. C. Howe, S. P. Hirshman, D. K. Lee

研究成果: ジャーナルへの寄稿記事

39 引用 (Scopus)

抄録

The MHD equilibrium properties of neutral beam heated plasmas have been experimentally investigated in the Compact Helical System (CHS)-a low aspect ratio (Ap ∼ 5) heliotron/torsatron. This configuration is characterized by a strong breaking of helical symmetry. The radial profiles measured by various diagnostics have shown a significant Shafranov shift due to the plasma pressure. The deviation of the magnetic axis from is vacuum position has become as large as 50% of the minor radius. When the three-dimensional equilibrium code VMEC is used to reconstruct the equilibrium from the experimental data, the result is in good agreement with the experimentally observed Shafranov shift as well as with the diamagnetic pressure in plasmas with 〈β〉 ≤ 1.2% and β0 ≤ 3.3%. This beta values corresponds to half of the conventional equilibrium β limit defined by the Shafranov shift reaching a value of half of the minor radius. Although tangential neutral beam injection causes pressure anisotropies, p ||/p ≤ 3, the description of the equilibrium assuming isotropic pressure is consistent with the experiment.

元の言語英語
記事番号I03
ページ(範囲)25-32
ページ数8
ジャーナルNuclear Fusion
32
発行部数1
DOI
出版物ステータス出版済み - 12 1 1992

Fingerprint

low aspect ratio
shift
neutral beams
radii
plasma pressure
beam injection
deviation
vacuum
anisotropy
causes
symmetry
profiles
configurations

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

これを引用

Yamada, H., Ida, K., Iguchi, H., Morita, S., Kaneko, O., Arimoto, H., ... Lee, D. K. (1992). Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System. Nuclear Fusion, 32(1), 25-32. [I03]. https://doi.org/10.1088/0029-5515/32/1/I03

Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System. / Yamada, H.; Ida, K.; Iguchi, H.; Morita, S.; Kaneko, O.; Arimoto, H.; Hosokawa, M.; Idei, H.; Kubo, S.; Matsuoka, K.; Nishimura, K.; Okamura, S.; Takeiri, Y.; Takita, Y.; Takahashi, C.; Hanatani, K.; Howe, H. C.; Hirshman, S. P.; Lee, D. K.

:: Nuclear Fusion, 巻 32, 番号 1, I03, 01.12.1992, p. 25-32.

研究成果: ジャーナルへの寄稿記事

Yamada, H, Ida, K, Iguchi, H, Morita, S, Kaneko, O, Arimoto, H, Hosokawa, M, Idei, H, Kubo, S, Matsuoka, K, Nishimura, K, Okamura, S, Takeiri, Y, Takita, Y, Takahashi, C, Hanatani, K, Howe, HC, Hirshman, SP & Lee, DK 1992, 'Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System', Nuclear Fusion, 巻. 32, 番号 1, I03, pp. 25-32. https://doi.org/10.1088/0029-5515/32/1/I03
Yamada H, Ida K, Iguchi H, Morita S, Kaneko O, Arimoto H その他. Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System. Nuclear Fusion. 1992 12 1;32(1):25-32. I03. https://doi.org/10.1088/0029-5515/32/1/I03
Yamada, H. ; Ida, K. ; Iguchi, H. ; Morita, S. ; Kaneko, O. ; Arimoto, H. ; Hosokawa, M. ; Idei, H. ; Kubo, S. ; Matsuoka, K. ; Nishimura, K. ; Okamura, S. ; Takeiri, Y. ; Takita, Y. ; Takahashi, C. ; Hanatani, K. ; Howe, H. C. ; Hirshman, S. P. ; Lee, D. K. / Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System. :: Nuclear Fusion. 1992 ; 巻 32, 番号 1. pp. 25-32.
@article{086208e0948b4211a4efb6f7e1990347,
title = "Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System",
abstract = "The MHD equilibrium properties of neutral beam heated plasmas have been experimentally investigated in the Compact Helical System (CHS)-a low aspect ratio (Ap ∼ 5) heliotron/torsatron. This configuration is characterized by a strong breaking of helical symmetry. The radial profiles measured by various diagnostics have shown a significant Shafranov shift due to the plasma pressure. The deviation of the magnetic axis from is vacuum position has become as large as 50{\%} of the minor radius. When the three-dimensional equilibrium code VMEC is used to reconstruct the equilibrium from the experimental data, the result is in good agreement with the experimentally observed Shafranov shift as well as with the diamagnetic pressure in plasmas with 〈β〉 ≤ 1.2{\%} and β0 ≤ 3.3{\%}. This beta values corresponds to half of the conventional equilibrium β limit defined by the Shafranov shift reaching a value of half of the minor radius. Although tangential neutral beam injection causes pressure anisotropies, p ||/p⊥ ≤ 3, the description of the equilibrium assuming isotropic pressure is consistent with the experiment.",
author = "H. Yamada and K. Ida and H. Iguchi and S. Morita and O. Kaneko and H. Arimoto and M. Hosokawa and H. Idei and S. Kubo and K. Matsuoka and K. Nishimura and S. Okamura and Y. Takeiri and Y. Takita and C. Takahashi and K. Hanatani and Howe, {H. C.} and Hirshman, {S. P.} and Lee, {D. K.}",
year = "1992",
month = "12",
day = "1",
doi = "10.1088/0029-5515/32/1/I03",
language = "English",
volume = "32",
pages = "25--32",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System

AU - Yamada, H.

AU - Ida, K.

AU - Iguchi, H.

AU - Morita, S.

AU - Kaneko, O.

AU - Arimoto, H.

AU - Hosokawa, M.

AU - Idei, H.

AU - Kubo, S.

AU - Matsuoka, K.

AU - Nishimura, K.

AU - Okamura, S.

AU - Takeiri, Y.

AU - Takita, Y.

AU - Takahashi, C.

AU - Hanatani, K.

AU - Howe, H. C.

AU - Hirshman, S. P.

AU - Lee, D. K.

PY - 1992/12/1

Y1 - 1992/12/1

N2 - The MHD equilibrium properties of neutral beam heated plasmas have been experimentally investigated in the Compact Helical System (CHS)-a low aspect ratio (Ap ∼ 5) heliotron/torsatron. This configuration is characterized by a strong breaking of helical symmetry. The radial profiles measured by various diagnostics have shown a significant Shafranov shift due to the plasma pressure. The deviation of the magnetic axis from is vacuum position has become as large as 50% of the minor radius. When the three-dimensional equilibrium code VMEC is used to reconstruct the equilibrium from the experimental data, the result is in good agreement with the experimentally observed Shafranov shift as well as with the diamagnetic pressure in plasmas with 〈β〉 ≤ 1.2% and β0 ≤ 3.3%. This beta values corresponds to half of the conventional equilibrium β limit defined by the Shafranov shift reaching a value of half of the minor radius. Although tangential neutral beam injection causes pressure anisotropies, p ||/p⊥ ≤ 3, the description of the equilibrium assuming isotropic pressure is consistent with the experiment.

AB - The MHD equilibrium properties of neutral beam heated plasmas have been experimentally investigated in the Compact Helical System (CHS)-a low aspect ratio (Ap ∼ 5) heliotron/torsatron. This configuration is characterized by a strong breaking of helical symmetry. The radial profiles measured by various diagnostics have shown a significant Shafranov shift due to the plasma pressure. The deviation of the magnetic axis from is vacuum position has become as large as 50% of the minor radius. When the three-dimensional equilibrium code VMEC is used to reconstruct the equilibrium from the experimental data, the result is in good agreement with the experimentally observed Shafranov shift as well as with the diamagnetic pressure in plasmas with 〈β〉 ≤ 1.2% and β0 ≤ 3.3%. This beta values corresponds to half of the conventional equilibrium β limit defined by the Shafranov shift reaching a value of half of the minor radius. Although tangential neutral beam injection causes pressure anisotropies, p ||/p⊥ ≤ 3, the description of the equilibrium assuming isotropic pressure is consistent with the experiment.

UR - http://www.scopus.com/inward/record.url?scp=0026631995&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026631995&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/32/1/I03

DO - 10.1088/0029-5515/32/1/I03

M3 - Article

AN - SCOPUS:0026631995

VL - 32

SP - 25

EP - 32

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 1

M1 - I03

ER -