Radial transport characteristics of fast ions due to energetic-particle modes inside the last closed-flux surface in the compact helical system.
The internal behavior of fast ions interacting with magnetohydrodynamic bursts excited by energetic ions has been experimentally investigated in the compact helical system. The resonant convective oscillation of fast ions was identified inside the last closed-flux surface during an energetic-particle mode (EPM) burst. The phase difference between the fast-ion oscillation and the EPM, indicating the coupling strength between them, remains a certain value during the EPM burst and drives an anomalous transport of fast ions.
Nagaoka
Kenichi
K
National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan.
Isobe
Mitsutaka
M
Toi
Kazuo
K
Shimizu
Akihiro
A
Fujisawa
Akihide
A
Ohshima
Shunsuke
S
Nakano
Haruhisa
H
Osakabe
Masaki
M
Todo
Yasushi
Y
Akiyama
Tsuyoshi
T
Nagashima
Yoshihiko
Y
Suzuki
Chihiro
C
Nishimura
Shin
S
Yoshimura
Yasuo
Y
Matsuoka
Keisuke
K
Okamura
Shoichi
S