The Large Helical Device (LHD) helical divertor

N. Ohyabu; T. Watanabe; H. Ji; H. Akao; T. Ono; T. Kawamura; K. Yamazaki; K. Akaishi; N. Inoue; A. Komori; Y. Kubota; N. Noda; A. Sagara; H. Suzuki; O. Motojima; M. Fujiwara; A. Iiyoshi

doi:10.1088/0029-5515/34/3/I07

The Large Helical Device (LHD) helical divertor

N. Ohyabu
, T. Watanabe
, H. Ji
, H. Akao
, T. Ono
, T. Kawamura
, K. Yamazaki
, K. Akaishi
, N. Inoue
, A. Komori
, Y. Kubota
, N. Noda
, A. Sagara
, H. Suzuki
, O. Motojima
, M. Fujiwara
, A. Iiyoshi

Astrophysical Sciences

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

183 Scopus citations

Abstract

The Large Helical Device (LHD) now under construction is a heliotron/torsatron device with a closed divertor system. The edge LHD magnetic structure has been studied in detail. A peculiar feature of the configuration is the existence of edge surface layers, a complicated three dimensional magnetic structure which does not, however, seem to hamper the expected divertor functions. Two divertor operational modes are being considered for the LHD experiment-high density, cold radiative divertor operation as a safe heat removal scheme and high temperature divertor plasma operation. In the latter operation, a divertor plasma with a temperature of a few keV, generated by efficient pumping, is expected to lead to a significant improvement in core plasma confinement. Conceptual designs of the LHD divertor components are under way.

Original language	English (US)
Article number	I07
Pages (from-to)	387-399
Number of pages	13
Journal	Nuclear Fusion
Volume	34
Issue number	3
DOIs	https://doi.org/10.1088/0029-5515/34/3/I07
State	Published - 1994

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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title = "The Large Helical Device (LHD) helical divertor",

abstract = "The Large Helical Device (LHD) now under construction is a heliotron/torsatron device with a closed divertor system. The edge LHD magnetic structure has been studied in detail. A peculiar feature of the configuration is the existence of edge surface layers, a complicated three dimensional magnetic structure which does not, however, seem to hamper the expected divertor functions. Two divertor operational modes are being considered for the LHD experiment-high density, cold radiative divertor operation as a safe heat removal scheme and high temperature divertor plasma operation. In the latter operation, a divertor plasma with a temperature of a few keV, generated by efficient pumping, is expected to lead to a significant improvement in core plasma confinement. Conceptual designs of the LHD divertor components are under way.",

author = "N. Ohyabu and T. Watanabe and H. Ji and H. Akao and T. Ono and T. Kawamura and K. Yamazaki and K. Akaishi and N. Inoue and A. Komori and Y. Kubota and N. Noda and A. Sagara and H. Suzuki and O. Motojima and M. Fujiwara and A. Iiyoshi",

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doi = "10.1088/0029-5515/34/3/I07",

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TY - JOUR

T1 - The Large Helical Device (LHD) helical divertor

AU - Ohyabu, N.

AU - Watanabe, T.

AU - Ji, H.

AU - Akao, H.

AU - Ono, T.

AU - Kawamura, T.

AU - Yamazaki, K.

AU - Akaishi, K.

AU - Inoue, N.

AU - Komori, A.

AU - Kubota, Y.

AU - Noda, N.

AU - Sagara, A.

AU - Suzuki, H.

AU - Motojima, O.

AU - Fujiwara, M.

AU - Iiyoshi, A.

PY - 1994

Y1 - 1994

N2 - The Large Helical Device (LHD) now under construction is a heliotron/torsatron device with a closed divertor system. The edge LHD magnetic structure has been studied in detail. A peculiar feature of the configuration is the existence of edge surface layers, a complicated three dimensional magnetic structure which does not, however, seem to hamper the expected divertor functions. Two divertor operational modes are being considered for the LHD experiment-high density, cold radiative divertor operation as a safe heat removal scheme and high temperature divertor plasma operation. In the latter operation, a divertor plasma with a temperature of a few keV, generated by efficient pumping, is expected to lead to a significant improvement in core plasma confinement. Conceptual designs of the LHD divertor components are under way.

AB - The Large Helical Device (LHD) now under construction is a heliotron/torsatron device with a closed divertor system. The edge LHD magnetic structure has been studied in detail. A peculiar feature of the configuration is the existence of edge surface layers, a complicated three dimensional magnetic structure which does not, however, seem to hamper the expected divertor functions. Two divertor operational modes are being considered for the LHD experiment-high density, cold radiative divertor operation as a safe heat removal scheme and high temperature divertor plasma operation. In the latter operation, a divertor plasma with a temperature of a few keV, generated by efficient pumping, is expected to lead to a significant improvement in core plasma confinement. Conceptual designs of the LHD divertor components are under way.

UR - https://www.scopus.com/pages/publications/0028387131

UR - https://www.scopus.com/pages/publications/0028387131#tab=citedBy

U2 - 10.1088/0029-5515/34/3/I07

DO - 10.1088/0029-5515/34/3/I07

M3 - Article

AN - SCOPUS:0028387131

SN - 0029-5515

VL - 34

SP - 387

EP - 399

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 3

M1 - I07

ER -

The Large Helical Device (LHD) helical divertor

Abstract

All Science Journal Classification (ASJC) codes

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