Causal Relationship between Zonal Flow and Turbulence in a Toroidal Plasma
-
- Fujisawa Akihide
- National Institute for Fusion Science
-
- Shimizu Akihiro
- National Institute for Fusion Science
-
- Nakano Haruhisa
- National Institute for Fusion Science
-
- Ohshima Shinsuke
- National Institute for Fusion Science
-
- Itoh Kimitaka
- National Institute for Fusion Science
-
- Nagashima Yoshihiko
- RIAM, Kyushu University
-
- Itoh Sanae-I.
- RIAM, Kyushu University
-
- Iguchi Harukazu
- National Institute for Fusion Science
-
- Yoshimura Yasuo
- National Institute for Fusion Science
-
- Minami Takashi
- National Institute for Fusion Science
-
- Nagaoka Keiichi
- National Institute for Fusion Science
-
- Takahashi Chihiro
- National Institute for Fusion Science
-
- Kojima Mamoru
- National Institute for Fusion Science
-
- Nishimura Shin
- National Institute for Fusion Science
-
- Isobe Mitsutaka
- National Institute for Fusion Science
-
- Suzuki Chihiro
- National Institute for Fusion Science
-
- Akiyama Tsuyoshi
- National Institute for Fusion Science
-
- Ido Takeshi
- National Institute for Fusion Science
-
- Matsuoka Keisuke
- National Institute for Fusion Science
-
- Okamura Shoichi
- National Institute for Fusion Science
-
- Diamond Patrick H.
- University of California, San Diego
Search this article
Abstract
Electric field fluctuations are directly measured using twin heavy-ion-beam probes in Compact Helical System. The spectrum of the electric field fluctuation reveals the existence of a zonal flow at a frequency of less than 1 kHz, coherent modes with a long correlation length (conjectured as geodesic acoustic modes), and background turbulence. Analyses using a wavelet elucidate nonlinear interactions between these fluctuation components in disparate scales. The highlighted findings are that the turbulent fluctuations should be modulated in response to the direction of zonal flow, and should be suppressed, on average, by the zonal flow. This is the first observation that demonstrates the causal linkage between zonal flow and turbulence in toroidal plasmas at a high temperature.
Journal
-
- Journal of the Physical Society of Japan
-
Journal of the Physical Society of Japan 76 (3), 033501-033501, 2007
THE PHYSICAL SOCIETY OF JAPAN
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390282679170796416
-
- NII Article ID
- 130005296679
- 110006240182
- 210000106570
-
- NII Book ID
- AA00704814
-
- ISSN
- 13474073
- 00319015
-
- NDL BIB ID
- 8688248
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed