Observation of temporal plasma-wave echoes in an ion-wave regime

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.49.2276· OSTI ID:5211904

Yugami, N; Kusaka, S; Nishida, Y ^[1]

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1. Department of Electrical and Electronic Engineering, Utsunomiya University, 2753 Ishii-machi, Utsunomiya, Tochigi 321 (Japan)

Temporal echoes in an ion-wave regime are observed in microwave-plasma interaction experiments. When two short microwave pulses ([tau][le]1/[ital f][sub [ital p][ital i]], where [tau] is the pulse width and [ital f][sub [ital p][ital i]] is ion plamsa frequency) are applied successively, one after another, in the nonuniform magnetic-field-free plasma, waves in ion plasma frequency range and plasma density cavity (caviton) are excited at the critical layer of the resonance absorption. After the waves damp out by Landau damping, temporal echoes appear in both the critical layer and underdense region. In the overdense region, however, no echo appears in the present experiments. The results are explained by the theoretical prediction given by Gould, O'Neil, and Malmberg [Phys. Rev. Lett. 19, 219 (1967)].

• OSTI ID: 5211904
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States) Vol. 49:3; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
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ABSORPTION
ARGON
ATOM COLLISIONS
COLLISIONS
DAMPING
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
FLUIDS
GASES
ION WAVES
LANDAU DAMPING
MICROWAVE RADIATION
NONMETALS
PLASMA
PLASMA WAVES
RADIATIONS
RARE GASES
RESONANCE ABSORPTION
SORPTION
TIME DEPENDENCE
WAVE PROPAGATION