Bounce Precession Fishbones in the National Spherical Tokamak Experiment

Fredrickson, Eric ; Chen, Liu ; Fredrickson, Roscoe White Eric ; White, Roscoe

Princeton University. Plasma Physics Laboratory.

关键词: Beam Plasma Interactions;    Beam Injection;    Fishbone Instability;    70 Plasma Physics And Fusion Technology;    Spherical Tokamak;   

DOI  :  10.2172/813691
RP-ID  :  PPPL-3715
RP-ID  :  AC02-76CH03073
RP-ID  :  813691

美国|英语

来源: UNT Digital Library

【 摘 要 】

Bursting modes are observed on the National Spherical Torus Experiment [M. Ono et al., Nucl. Fusion 40 (2000) 557], which are identified as bounce-precession-frequency fishbone modes. They are predicted to be important in high-current, low-shear discharges with a significant population of trapped particles with a large mean-bounce angle, such as produced by near-tangential beam injection into a large aspect-ratio device. Such a distribution is often stable to the usual precession-resonance fishbone mode. These modes could be important in ignited plasmas, driven by the trapped-alpha-particle population.