Observation of the Effects of Radially Sheared Electric Fields on the Suppression of Turbulent Vortex Structures and the Associated Transverse Loss in GAMMA 10

Autor: Yousuke Nakashima, Akiyoshi Itakura, Isao Katanuma, Hitoshi Hojo, Junko Kohagura, Khairul Islam, Noboru Yokoyama, Makoto Ichimura, Mafumi Hirata, Hiroyuki Higaki, Masayuki Yoshikawa, Tuyosi Imai, Y. Kojima, V. P. Pastukhov, T. Numakura, Suguru Tokioka, Kameo Ishii, M. Yoshida, Yamato Tomii, Yoshinori Tatematsu, Teruo Saito, Teruji Cho, S. Miyoshi
Jazyk: angličtina
Rok vydání: 2005
Předmět:
Zdroj: Physical review letters. 94(8):085002
ISSN: 0031-9007
Popis: application/pdf
Vortexlike turbulent structures in hot-ion mode plasmas with several keV are observed in the case with a radially produced weak shear of electric fields Er. However, a strong Er shear formation due to a high ion-confining potential ϕc production clears up these vortices together with plasma-confinement improvement and disappearance of both drift-wave and turbulencelike Fourier spectral signals. These findings are based on three-time progress in ϕc in comparison to ϕc attained 1992–2002. The significant advance of ϕc is well extended in line with proposed potential-formation physics scalings.
Databáze: OpenAIRE