TY - JOUR
T1 - Observation of zonal flow type oscillation in linear cylindrical ECR plasmas
AU - Kamataki, Kunihiro
AU - Itoh, Sanae I.
AU - Nagashima, Yoshihiko
AU - Inagaki, Shigeru
AU - Shinohara, Shunjiro
AU - Yagi, Masatoshi
AU - Yamada, Takuma
AU - Kawai, Yoshinobu
AU - Fujisawa, Akihide
AU - Itoh, Kimitaka
N1 - Funding Information:
We would like to acknowledge useful discussions with Dr. A. Fukuyama, Dr. N. Kasuya, and Dr. S. Nishimura. This work is partly supported by a Grant-in-Aid for Specially-Promoted Research of MEXT of Japan (16002005), by Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists, and by a collaborative program between the Research Institute for Applied Mechanics of Kyushu University and The National Institute for Fusion Science (NIFS) (NIFS07KOAP017)
Publisher Copyright:
© 2008 The Japan Society of Plasma Science and Nuclear Fusion Research.
PY - 2008
Y1 - 2008
N2 - Zonal flow type oscillation, which is driven by a small modulation of the electron cyclotron resonance (ECR) power in a low-frequency band (< 0.1 kHz), and its impact on drift wave turbulence are observed in linear cylindrical ECR plasmas by simultaneous spatiotemporal measurements with a multi-ring probe array. It is found that a potential low-frequency (< 0.1 kHz) oscillation can have a zonal flow type structure. Bicoherence analysis reveals that this zonal flow type oscillation has a nonlinear interaction with the drift mode. These results indicate that an electric field with zonal flow, which is excited externally, can modulate the drift mode amplitude, similar to spontaneous zonal flow.
AB - Zonal flow type oscillation, which is driven by a small modulation of the electron cyclotron resonance (ECR) power in a low-frequency band (< 0.1 kHz), and its impact on drift wave turbulence are observed in linear cylindrical ECR plasmas by simultaneous spatiotemporal measurements with a multi-ring probe array. It is found that a potential low-frequency (< 0.1 kHz) oscillation can have a zonal flow type structure. Bicoherence analysis reveals that this zonal flow type oscillation has a nonlinear interaction with the drift mode. These results indicate that an electric field with zonal flow, which is excited externally, can modulate the drift mode amplitude, similar to spontaneous zonal flow.
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U2 - 10.1585/pfr.3.047
DO - 10.1585/pfr.3.047
M3 - Article
AN - SCOPUS:77049118005
SN - 1880-6821
VL - 3
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
M1 - 047
ER -