TY - JOUR
T1 - Radial build between helical coil and plasma in the Large Helical Device
AU - Ohyabu, N.
AU - Yamazaki, K.
AU - Ji, Hantao
AU - Imagawa, S.
AU - Kaneko, H.
AU - Morimoto, S.
AU - Noda, N.
AU - Satow, T.
AU - Yamamoto, J.
AU - Motojima, O.
AU - LHD Design Group, Design Group
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1993/1
Y1 - 1993/1
N2 - The Large Helical Device (LHD) is a heliotron/torsatron-type confinement device (B = 4 T, R = 3.9 m) equipped with a helical divertor. In the LHD configuration, the plasma region is shifted inwards approximately a third of the plasma minor radius relative to the center of the two pairing helical coils, thus making the distance between the coil center and the edge plasma small, 328 mm on the small major radius side of the torus. Within this space, many components must be installed, such as the superconducting helical coil (163), its coil can (45), the thermal shield (30), the vacuum gap (35), the plasma vacuum vessel (15), the first wall (25) (the numbers in the parentheses are allocated radial space in mm for the respective components). Effective edge plasma control by the divertor requires a space of more than 15 mm between the plasma and the first wall. To meet the above space requirement, the thickness of the helical coil is designed to be as small as possible, yet the coil current density and maximum field strength are within the limits of reliable coil operation.
AB - The Large Helical Device (LHD) is a heliotron/torsatron-type confinement device (B = 4 T, R = 3.9 m) equipped with a helical divertor. In the LHD configuration, the plasma region is shifted inwards approximately a third of the plasma minor radius relative to the center of the two pairing helical coils, thus making the distance between the coil center and the edge plasma small, 328 mm on the small major radius side of the torus. Within this space, many components must be installed, such as the superconducting helical coil (163), its coil can (45), the thermal shield (30), the vacuum gap (35), the plasma vacuum vessel (15), the first wall (25) (the numbers in the parentheses are allocated radial space in mm for the respective components). Effective edge plasma control by the divertor requires a space of more than 15 mm between the plasma and the first wall. To meet the above space requirement, the thickness of the helical coil is designed to be as small as possible, yet the coil current density and maximum field strength are within the limits of reliable coil operation.
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U2 - 10.1016/0920-3796(93)90026-E
DO - 10.1016/0920-3796(93)90026-E
M3 - Article
AN - SCOPUS:38249007569
SN - 0920-3796
VL - 20
SP - 73
EP - 77
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
IS - C
ER -