Island dynamics in the large-helical-device plasmas.
In the Large Helical Device plasma discharges, the size of an externally imposed island with mode number ( n/m = 1/1) decreases substantially when the plasma is collisionless ( nu(*)< approximately 1) and the beta is finite ( > approximately 0.1%) at the island location. For the collisional plasmas with finite beta, on the other hand, the size of the island increases. However, there is a threshold in terms of the vacuum island size below which the island enlargement is not seen.
Ohyabu
N
N
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan.
Ida
K
K
Morisaki
T
T
Narihara
K
K
Komori
A
A
Watanabe
K
K
Narushima
Y
Y
Nagayama
Y
Y
Shoji
M
M
Ashikawa
N
N
Emoto
M
M
Funaba
H
H
Goto
M
M
Idei
H
H
Ikeda
K
K
Inagaki
S
S
Inoue
N
N
Isobe
M
M
Khlopenkov
K
K
Kobuchi
T
T
Kostrioukov
A
A
Kubo
S
S
Kumazawa
R
R
Liang
Y
Y
Masuzaki
S
S
Minami
T
T
Miyazawa
J
J
Morita
S
S
Muto
S
S
Mutoh
T
T
Murakami
S
S
Nakamura
Y
Y
Nakanishi
H
H
Nishimura
K
K
Noda
N
N
Notake
T
T
Ohkubo
K
K
Ohdachi
S
S
Oka
Y
Y
Osakabe
M
M
Ozaki
T
T
Peterson
B J
BJ
Sakamoto
R
R
Sakakibara
S
S
Sagara
A
A
Saito
K
K
Sasao
M
M
Sato
K
K
Sato
M
M
Seki
T
T
Shimozuma
T
T
Sudo
S
S
Suzuki
H
H
Takeiri
Y
Y
Tanaka
K
K
Tamura
N
N
Toi
K
K
Tokuzawa
T
T
Torii
Y
Y
Tsumori
K
K
Watanabe
T
T
Yamazaki
K
K
Yamada
I
I
Yamamoto
S
S
Yokoyama
M
M
Yoshimura
Y
Y
Watari
T
T
Xu
Y
Y
Kaneko
O
O
Kawahata
K
K
Yamada
H
H
Motojima
O
O