MHD Induced Neutral Beam Ion Loss from NSTX Plasmas

Conference · Thu Dec 13 00:00:00 EST 2007 · Accepted for publication in Nuclear Fusion

OSTI ID:961568

D.S. Darrow, E.D. Fredrickson, N.N. Gorelenkov, A.L. Roquemore, and K. Shinohara

Bursts of ~60 kHz activity on Mirnov coils occur frequently in NSTX plasmas and these are accompanied by bursts of neutral beam ion loss over a range in pitch angles. These losses have been measured with a scintillator type loss probe imaged with a high speed (>10,000 frames/s) video camera, giving the evolution of the energy and pitch angle distributions of the lost neutral beam ions over the course of the events. The instability occurs below the TAE frequency in NSTX (~100 kHz) in high beta plasmas and may be a beta driven Alfvén acoustic (BAAE) mode.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-ACO2-76CHO3073
• OSTI ID: 961568
• Report Number(s): PPPL-4274; TRN: US0904430
• Journal Information: Accepted for publication in Nuclear Fusion, Conference: Tenth IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems, 8–10 October 2007, Kloster Seeon, Germany
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACOUSTICS
IAEA
INCLINATION
INSTABILITY
MAGNETIC CONFINEMENT
PHOSPHORS
PROBES
VELOCITY
Injection
Neutral Beam
MHD Instability