Influence of the ion/neutral atom mass ratio on the damping of electrostatic ion-cyclotron waves

The damping of electrostatic ion-cyclotron waves by ion-neutral collisions was studied in a single-ended Q machine. The amplitudes of K(+) and Cs(+) electrostatic ion-cyclotron waves were measured as a function of neutral pressure in helium, neon, argon, krypton, and xenon. For each ion/neutral atom...

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Veröffentlicht in:	Phys. Fluids; (United States) 1987-10, Vol.30 (10), p.3304-3306
Hauptverfasser:	Suszcynsky, D. M., Cartier, S. L., D'Angelo, N., Merlino, R. L.
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700108 - Fusion Energy- Plasma Research- Wave Phenomena AMPLITUDES ARGON ATOM COLLISIONS COLLISIONAL PLASMA COLLISIONS DAMPING ELASTIC SCATTERING ELEMENTS Exact sciences and technology FLUIDS GASES HELIUM ION COLLISIONS ION-ATOM COLLISIONS KRYPTON NEON NONMETALS Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA PLASMA DIAGNOSTICS Plasma Physics PLASMA WAVES PRESSURE DEPENDENCE RARE GASES SCATTERING Waves, oscillations, and instabilities in plasmas and intense beams XENON
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Zusammenfassung:	The damping of electrostatic ion-cyclotron waves by ion-neutral collisions was studied in a single-ended Q machine. The amplitudes of K(+) and Cs(+) electrostatic ion-cyclotron waves were measured as a function of neutral pressure in helium, neon, argon, krypton, and xenon. For each ion/neutral atom combination, the electrostatic ion-cyclotron wave amplitude maximizes at a neutral pressure that scales monotonically with the m(+)/m(n) mass ratio. This result is interpreted by considering the dynamics of elastic collisions between the ions and the neutral atoms.
ISSN:	0031-9171 2163-4998
DOI:	10.1063/1.866460