A CO2LASER -PLASMA INTERACTION EXPERIMENT- THE SCATTERED SPECTRUM OF LANGMUIR WAVES DRIVEN VIA THE ELECTRON-ION DECAY INSTABILITY

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-745-C7-746
Author(s):  
M. J. Forrest ◽  
R. E. Kirk ◽  
N. J. Peacock
Keyword(s):  
Langmuir Waves ◽  
Plasma Interaction ◽  
Decay Instability ◽  
Scattered Spectrum ◽  
Interaction Experiment

PLASMA DIAGNOSTICS IN THE HEAVY ION BEAM-DENSE PLASMA INTERACTION EXPERIMENT AT ORSAY

1988 ◽  
Vol 49 (C7) ◽  
pp. C7-141-C7-149 ◽  
Author(s):  
C. FLEURIER ◽  
A. SANBA ◽  
D. HONG ◽  
J. MATHIAS ◽  
J. C. PELLICER
Keyword(s):  
Plasma Diagnostics ◽  
Dense Plasma ◽  
Ion Beam ◽  
Heavy Ion ◽  
Plasma Interaction ◽  
Interaction Experiment ◽  
Heavy Ion Beam

scholarly journals Coherent amplitude modulation of electron-beam-driven Langmuir waves

2013 ◽  
Vol 31 (4) ◽  
pp. 633-638 ◽  
Author(s):  
K. Baumgärtel
Keyword(s):  
Electron Beam ◽  
Amplitude Modulation ◽  
Linear Analysis ◽  
Uniform Domain ◽  
Periodic Modulation ◽  
Langmuir Waves ◽  
Plasma Oscillations ◽  
Plasma Interaction ◽  
Particle In Cell ◽  
Linear Approach

Abstract. A linear approach to the phenomenon of irregular amplitude modulation of beam-driven Langmuir waves, developed in a previous paper, is extended to explain periodic modulation as well. It comes about by beating of the fastest growing mode of the instability with beam-aligned plasma oscillations. They are naturally generated in a uniform domain of beam–plasma interaction prior to the onset of the instability. Particle-in-cell (PIC) simulations support the results of the linear analysis.

scholarly journals Final report of investigation of the Acoustic Decay Instability in laser plasma interaction

1991 ◽  
Author(s):  
P. Young ◽  
P. Drake ◽  
Estabrook ◽  
K. Mizuno ◽  
J.S. De Groot
Keyword(s):  
Laser Plasma ◽  
Final Report ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Decay Instability

scholarly journals Beam-plasma interaction experiment in the magnetosphere by emitting an electron beam from satellite JIKIKEN (EXOS-B).

1981 ◽  
Vol 33 (1) ◽  
pp. 145-159 ◽  
Author(s):  
Nobuki KAWASHIMA ◽  
Atsuo USHIKOSHI ◽  
Yukio MURASATO ◽  
Akira MORIOKA ◽  
Hiroshi OYA ◽  
...  
Keyword(s):  
Electron Beam ◽  
Plasma Interaction ◽  
Beam Plasma ◽  
Interaction Experiment

scholarly journals A linear model for amplitude modulation of Langmuir waves in weak electron-beam plasma interaction

2013 ◽  
Vol 31 (1) ◽  
pp. 31-38 ◽  
Author(s):  
K. Baumgärtel
Keyword(s):  
Amplitude Modulation ◽  
Langmuir Wave ◽  
Langmuir Waves ◽  
Plasma Interaction ◽  
Temporal Representation ◽  
Weak Beam ◽  
Beam Plasma ◽  
The Waves ◽  
Electron Beam Plasma ◽  
Weak Electron

Abstract. A simple linear approach to the phenomenon of amplitude modulation of Langmuir waves in weak beam plasma interaction is presented. During the short growth phase of the instability and within the longer period after saturation, the waves are described by their linear kinetic dispersion properties.The amplitude modulation appears as result of the beating of waves with different wavelengths and amplitudes that have grown from noise in the initial phase. The Langmuir wave fields are calculated via FFT (fast Fourier transform) technique. The resulting waveforms in temporal representation are quite similar to those observed by spacecraft.

scholarly journals Electron Beams and Langmuir Turbulence in Solar Type III Radio Bursts Observed in the Interplanetary Medium

1990 ◽  
Vol 142 ◽  
pp. 467-481
Author(s):  
R. P. Lin
Keyword(s):  
Interplanetary Medium ◽  
Electron Beams ◽  
Low Frequency ◽  
Langmuir Wave ◽  
Plasma Waves ◽  
Wave Number ◽  
Langmuir Waves ◽  
Decay Instability ◽  
Type Iii ◽  
Solar Type

The ISEE-3 spacecraft has provided in situ observations of electron beams, plasma waves, and associated solar type III radio emission in the interplanetary medium near 1 AU. These observations show that electron beams are formed by the faster electrons arriving before the slower ones, following an impulsive injection at the Sun. The resulting bump-on-tail in the reduced one-dimensional distribution function, f(v||), is unstable to the growth of electrostatic electron plasma (Langmuir) waves. The Langmuir waves are observed to be highly impulsive in nature. The onset and temporal variations of the observed plasma waves are in good qualitative agreement with the wave growth expected from the evolution of measured f(v||). However, far higher Langmuir wave intensities are predicted than are detected. In addition, the lack of obvious plateauing of the bump-on-tail suggests that the waves have been removed from resonance with the beam electrons by some wave-wave interaction. Bursts of low frequency, 30–300 Hz (in the spacecraft frame) waves are often found coincident in time with the most intense spikes of the Langmuir waves. These low-frequency waves appear to be long-wavelength ion acoustic waves, with wave number approximately equal to the beam-resonant Langmuir wave number. The observations suggest several possible interpretations: modulational instability, electrostatic decay instability, and electromagnetic decay instability; but none of these are fully consistent with the observations. Microstructures, too short in duration to be resolved by present experiments, have been invoked as an explanation of the phenomenon. Experiments are currently being developed to study these processes using fast wave-particle correlation techniques.

Two-plasmon decay in a CO2-laser-plasma interaction experiment

1978 ◽  
Vol 18 (2) ◽  
pp. 746-749 ◽  
Author(s):  
A. A. Offenberger ◽  
A. Ng ◽  
L. Pitt ◽  
M. R. Cervenan
Keyword(s):  
Co2 Laser ◽  
Laser Plasma ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Interaction Experiment
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