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Koliner JJ, Forest CB, Sarff JS, et al. Fast-particle-driven Alfvénic modes in a reversed field pinch. Phys Rev Lett. 2012;109(11):115003doi: 10.1103/PhysRevLett.109.115003.
Koliner, J. J., Forest, C. B., Sarff, J. S., Anderson, J. K., Liu, D., Nornberg, M. D., Waksman, J., Lin, L., Brower, D. L., Ding, W. X., & Spong, D. A. (2012). Fast-particle-driven Alfvénic modes in a reversed field pinch. Physical review letters, 109(11), 115003. https://doi.org/10.1103/PhysRevLett.109.115003
Koliner, J J, et al. "Fast-particle-driven Alfvénic modes in a reversed field pinch." Physical review letters vol. 109,11 (2012): 115003. doi: https://doi.org/10.1103/PhysRevLett.109.115003
Koliner JJ, Forest CB, Sarff JS, Anderson JK, Liu D, Nornberg MD, Waksman J, Lin L, Brower DL, Ding WX, Spong DA. Fast-particle-driven Alfvénic modes in a reversed field pinch. Phys Rev Lett. 2012 Sep 14;109(11):115003. doi: 10.1103/PhysRevLett.109.115003. Epub 2012 Sep 13. PMID: 23005639.
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Phys Rev Lett. 2012 Sep 14;109(11):115003. doi: 10.1103/PhysRevLett.109.115003. Epub 2012 Sep 13.

Fast-particle-driven Alfvénic modes in a reversed field pinch.

Physical review letters

J J Koliner, C B Forest, J S Sarff, J K Anderson, D Liu, M D Nornberg, J Waksman, L Lin, D L Brower, W X Ding, D A Spong

Affiliations

  1. Physics Department, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA. [email protected]

PMID: 23005639 DOI: 10.1103/PhysRevLett.109.115003

Abstract

Alfvénic modes are observed due to neutral beam injection for the first time in a reversed field pinch plasma. Modeling of the beam deposition and slowing down shows that the velocity and radial localization are high. This allows instability drive from inverse Landau damping of a bump-on-tail in the parallel distribution function or from free energy in the fast ion density gradient. Mode switching from a lower frequency toroidal mode number n=5 mode that scales with beam injection velocity to a higher frequency n=4 mode with Alfvénic scaling is observed.

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