PPPL-3715 is available in <a href="PPPL-3715.pdf">pdf</a> format (1.1 MB).

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<b>Bounce Precession Fishbones in the National Spherical Tokamak Experiment</b>
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<b>Authors:</b> Eric Fredrickson, Liu Chen, and Roscoe White 
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<b>Date of PPPL Report:</b> June 2002
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<b>Published in:</b> Nuclear Fusion <b>43</b> (October 2003) 1258-1264.</p>


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Bursting modes are observed on the National Spherical Torus Experiment [M. Ono et al., Nucl. Fusion <B>40</B> (2000) 557], which are identifed 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.





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