Saturation of energetic particle driven Alfven wave instability through velocity space diffusion

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Physics Letters. A

DOI:https://doi.org/10.1016/0375-9601(92)91084-5· OSTI ID:1178254

Gang, F. Y. ^[1]; Sigmar, D. J. ^[1]; Leboeuf, J. N. ^[2]

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1. Massachusetts Institute of Technology, Minneapolis, MN. Plasma Fusion Center
2. Oak Ridge National Lab., TN

It is demonstrated both numerically and analytically that the energetic particle driven Alfven wave instability saturates when the Alfven wave fluctuations are still quasi-coherent. The saturation is due to particle velocity space diffusion which steepens the velocity gradient of the resonant particles, thereby enhancing wave damping (Landau Damping).

• Research Organization: Massachusetts Institute of Technology, Minneapolis, MN (US). Plasma Fusion Center
• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-91ER54109
• OSTI ID: 1178254
• Report Number(s): PFC/JA-91-24
• Journal Information: Physics Letters. A, Vol. 161, Issue 6; ISSN 0375-9601
• Country of Publication: United States
• Language: English