TY - JOUR
T1 - Plasma hole
AU - Tanaka, Masayoshi Y.
AU - Nagaoka, Kenichi
AU - Okamoto, Atsushi
AU - Yoshimura, Shinji
AU - Kono, Mitsuo
N1 - Funding Information:
Manuscript received July 1, 2004. This work was supported by the Japan Society for the Promotion of Science. M. Y. Tanaka, K. Nagaoka, and S. Yoshimura are with the National Institute for Fusion Science, Gifu 509-5292, Japan (e-mail: mytanaka@nifs.ac.jp). A Okamoto is with the High Temperature Plasma Center, The University of Tokyo, Tokyo 113-8656, Japan. M. Kono is with the Faculty of Policy Studies, Chuo University, Tokyo 192-0393, Japan. Digital Object Identifier 10.1109/TPS.2005.845366
PY - 2005/4
Y1 - 2005/4
N2 - Plasma hole has been observed in a magnetized cylindrical plasma. The measurements of ion flow velocity revealed that the plasma hole has a sink flow to the core on a plane perpendicular to the magnetic field and also an axial flow. The vorticity distribution determined by the flow velocity field shows localization near the center axis. According to the flow velocity field and the vorticity distribution, the plasma hole is identified as a Burgers vortex, which is intrinsic in viscous fluids and is observed in a plasma for the first time. The effective viscosity estimated from the characteristic scale length of vorticity localization exhibits an anomaly, which is three orders of magnitude higher than the classical value.
AB - Plasma hole has been observed in a magnetized cylindrical plasma. The measurements of ion flow velocity revealed that the plasma hole has a sink flow to the core on a plane perpendicular to the magnetic field and also an axial flow. The vorticity distribution determined by the flow velocity field shows localization near the center axis. According to the flow velocity field and the vorticity distribution, the plasma hole is identified as a Burgers vortex, which is intrinsic in viscous fluids and is observed in a plasma for the first time. The effective viscosity estimated from the characteristic scale length of vorticity localization exhibits an anomaly, which is three orders of magnitude higher than the classical value.
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U2 - 10.1109/TPS.2005.845366
DO - 10.1109/TPS.2005.845366
M3 - Article
AN - SCOPUS:18844452645
SN - 0093-3813
VL - 33
SP - 454
EP - 455
JO - IEEE Transactions on Plasma Science
JF - IEEE Transactions on Plasma Science
IS - 2 I
ER -