抄録
Two types of electrostatic modes with small-poloidal wave numbers (∼1 and 10-15kHz) are observed in the edge region of Ohmically heated plasmas in the JFT-2M tokamak. The envelope of the higher frequency coherent mode is modulated at the frequency of the lower frequency mode. A bispectral analysis revealed that a significant nonlinear coupling among the two types of fluctuations and the broadband background turbulent potential fluctuations occurs inside the last closed magnetic flux surface, suggesting that a nonlinear process such as the parametric-modulational instability is involved.
本文言語 | 英語 |
---|---|
論文番号 | 095002 |
ジャーナル | Physical Review Letters |
巻 | 95 |
号 | 9 |
DOI | |
出版ステータス | 出版済み - 8月 26 2005 |
外部発表 | はい |
!!!All Science Journal Classification (ASJC) codes
- 物理学および天文学(全般)