Turbulence Scattering of High Harmonic Fast Waves

Ono, M. ; Hosea, J. ; LeBlanc, B. ; Menard, J. ; Phillips, C.K. ; Wilson, R. ; Ryan, P. ; Swain, D. ; Wilgen, J. ; Kubota, S. ; Mau, and T.K.

Princeton University. Plasma Physics Laboratory.

关键词: Magnetoacoustic Waves;    Probability;    Magnetic Fields;    Wavelengths;    70 Plasma Physics And Fusion Technology;   

DOI  :  10.2172/786532
RP-ID  :  PPPL-3571
RP-ID  :  AC02-76CH03073
RP-ID  :  786532

美国|英语

来源: UNT Digital Library

【 摘 要 】

Effect of scattering of high-harmonic fast-magnetosonic waves (HHFW) by low-frequency plasma turbulence is investigated. Due to the similarity of the wavelength of HHFW to that of the expected low-frequency turbulence in the plasma edge region, the scattering of HHFW can become significant under some conditions. The scattering probability increases with the launched wave parallel-phase-velocity as the location of the wave cut-off layer shifts toward the lower density edge. The scattering probability can be reduced significantly with higher edge plasma temperature, steeper edge density gradient, and magnetic field. The theoretical model could explain some of the HHFW heating observations on the National Spherical Torus Experiment (NSTX).