Parametric decay into ion cyclotron waves and drift waves in multi-ion-species plasma

Technical Report · Mon Oct 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/5863116· OSTI ID:5863116

Ono, M; Porkolab, M; Chang, R P.H.

Parametric decay processes near the ion cyclotron frequency are investigated experimentally and theoretically in multi-ion species plasmas. The relevant theoretical dispersion relation of the parametric coupling is derived, including the ion drift motion. Experiment data obtained in the Princeton L-4 device verifies these theoretical predictions in some detail. In a helium-neon plasma, the relative ion drift motion excites electrostatic ion cyclotron waves (the kinetic ion-ion hybrid mode) when ..cap omega../sub 0/ > ..cap omega../sub He/ + ..cap omega../sub Ne/. In a region of large density gradient, the ion drift motion also excites low frequency drift waves when ..cap omega../sub 0/ > ..cap omega../sub He/ + ..cap omega../sup */. The experimental data are found to agree well with the theory. The relevance of these processes to ICRF heating of fusion plasmas is pointed out.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.; Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Physics; Bell Labs., Murray Hill, NJ (USA)
• DOE Contract Number: EY-76-C-02-3073
• OSTI ID: 5863116
• Report Number(s): PPPL-1602
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
CRYOGENIC FLUIDS
CYCLOTRON FREQUENCY
DECAY INSTABILITY
DISPERSION RELATIONS
DRIFT INSTABILITY
ELEMENTS
FLUIDS
HEATING
HELIUM
HIGH-FREQUENCY HEATING
ICR HEATING
INSTABILITY
NEON
NONMETALS
PARAMETRIC INSTABILITIES
PLASMA
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
PLASMA WAVES
RARE GASES