Analytic treatment of electromagnetic emission near the plasma frequency via Langmuir wave decay

1999 ◽  
Vol 6 (10) ◽  
pp. 3799-3807 ◽  
Author(s):  
S. D. Edney ◽  
P. A. Robinson
Keyword(s):  
Plasma Frequency ◽  
Langmuir Wave ◽  
Electromagnetic Emission ◽  
Analytic Treatment ◽  
Wave Decay

scholarly journals Electromagnetic emission by subsequent processes L→L'+S and L+L'→T

2010 ◽  
Vol 6 (S274) ◽  
pp. 252-254 ◽  
Author(s):  
Marian Karlický ◽  
Miroslav Bárta
Keyword(s):  
Plasma Frequency ◽  
Langmuir Wave ◽  
Electromagnetic Emission ◽  
Small Region ◽  
Analytical Analysis ◽  
Particle In Cell ◽  
Early Stages

AbstractUsing a 2.5-D electromagnetic particle-in-cell (PIC) model, very early stages of a generation of the electromagnetic emission produced by a monochromatic Langmuir wave are studied. It is found that the electromagnetic emission, which is dominant on the harmonic of the plasma frequency, starts to be generated in a very small region of k-vectors. Later on the k-vectors of this emission are scattered around a ‘circle’ (in our 2-D case), given by the relations for the L+L'→T process. Analytical analysis of two subsequent processes L→L'+S a L+L'→T confirms these results.

Langmuir wave decay and collapse in the Jovian foreshock

1993 ◽  
Vol 41 (11-12) ◽  
pp. 823-832 ◽  
Author(s):  
Jerold P. Thiessen ◽  
Paul J. Kellogg
Keyword(s):  
Langmuir Wave ◽  
Wave Decay

Electromagnetic emission from laser wakefields in underdense magnetized plasmas

2012 ◽  
Vol 78 (4) ◽  
pp. 421-427 ◽  
Author(s):  
Z. D. HU ◽  
Z. M. SHENG ◽  
W. J. DING ◽  
W. M. WANG ◽  
Q. L. DONG ◽  
...  
Keyword(s):  
Plasma Frequency ◽  
Electromagnetic Emission ◽  
High Amplitude ◽  
Particle In Cell ◽  
Laser Propagation ◽  
Laser Wakefield ◽  
Cell Simulation ◽  
Pass Through ◽  
Underdense Plasma ◽  
Electromagnetic Component

AbstractThe laser wakefield structure in a magnetized underdense plasma is studied analytically and numerically. Because of the DC magnetic field perpendicular to the laser propagation direction, an electromagnetic component appears in addition to the normal electrostatic component. This electromagnetic component can transmit partially into vacuum at the plasma–vacuum boundary as shown by particle-in-cell simulation. It is found that the emission has components both at the fundamental plasma frequency and its harmonics if the wakefield is driven at a high amplitude. Comparing with the emission at the plasma frequency, the harmonic emission depends weakly upon the density profile at plasma–vacuum boundary and it can pass through the boundary almost without energy loss, providing a new method for the diagnostic of wakefields.

Second harmonic electromagnetic emission via Langmuir wave coalescence

1996 ◽  
Vol 3 (1) ◽  
pp. 149-159 ◽  
Author(s):  
A. J. Willes ◽  
P. A. Robinson ◽  
D. B. Melrose
Keyword(s):  
Second Harmonic ◽  
Langmuir Wave ◽  
Electromagnetic Emission

scholarly journals Oscillating two stream instability of a plasma wave in a negative ion containing plasma with hot and cold positive ions

2007 ◽  
Vol 25 (3) ◽  
pp. 397-406 ◽  
Author(s):  
Hitendra K. Malik
Keyword(s):  
Plasma Wave ◽  
Plasma Frequency ◽  
Low Frequency ◽  
Langmuir Wave ◽  
Negative Ions ◽  
Negative Ion ◽  
Charge Number ◽  
Long Wavelength ◽  
Positive Ions ◽  
Stream Instability

An oscillating two-stream instability (OTSI) is investigated in plasma, which has hot and cold positive ions, negative ions, and the electrons. For this, a long wavelength plasma wave is considered to be driven by two copropagating lasers with frequencies ωL1 and ωL2, such that their difference is almost equal to the electron plasma frequency ωp. In the present mechanism, this plasma beat wave (ωb, kb) is taken to grow in amplitude, so that it becomes susceptible to the OTSI and produces a low frequency electrostatic mode (ω, k), and two shorter wavelength Langmuir wave sidebands (ω1, k1) and (ω2, k2) with ω1 = ω − ωb, ω2 = ω + ωb, k1 = k − kb, and k2 = k + kb in the plasma. The effects of charge number Z, mass, temperature, and density of the ions are studied on the growth rate of the instability, and the amplitudes and phases of the sideband waves generated during the OTSI. It is found that the effects of charge number and mass of the ions are significant on the instability.

scholarly journals Mode Conversion and Reflection of Langmuir Waves in an Inhomogeneous Solar Wind

2001 ◽  
Vol 18 (4) ◽  
pp. 355-360 ◽  
Author(s):  
A. J. Willes ◽  
Iver H. Cairns
Keyword(s):  
Solar Wind ◽  
Electromagnetic Waves ◽  
Plasma Frequency ◽  
Mode Conversion ◽  
Langmuir Wave ◽  
Solar Wind Plasma ◽  
Langmuir Waves ◽  
Transverse Electromagnetic ◽  
Solar Wind Parameters ◽  
Conversion Efficiencies

AbstractBeam-driven Langmuir waves in the solar wind are generated just above the electron plasma frequency, which fluctuates in the inhomogeneous solar wind plasma. Consequently, propagating Langmuir waves encounter regions in which the wave frequency is less than the local plasma frequency, where they can be reflected, mode converted to transverse electromagnetic waves, and trapped in density wells. The aim here is to investigate Langmuir wave reflection and mode conversion at a linear density gradient for typical solar wind parameters. It is shown that higher mode conversion efficiencies are possible than previously calculated, but that mode conversion occurs in a smaller region of parameter space. In addition, the possibility of detecting mode conversion with in situ spacecraft Langmuir wave observations is discussed.

ANTENNA RADIATION NEAR THE LOCAL PLASMA FREQUENCY BY LANGMUIR WAVE EIGENMODES

2012 ◽  
Vol 755 (1) ◽  
pp. 45 ◽  
Author(s):  
David M. Malaspina ◽  
Iver H. Cairns ◽  
Robert E. Ergun
Keyword(s):  
Plasma Frequency ◽  
Langmuir Wave ◽  
Antenna Radiation

scholarly journals On the influence of Langmuir wave spectra on the spectra of electromagnetic waves generated in solar plasma with double plasma frequency

2021 ◽  
Vol 503 (4) ◽  
pp. 5740-5745
Author(s):  
Igor V Kudryavtsev ◽  
T I Kaltman
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetic Waves ◽  
Plasma Frequency ◽  
Langmuir Wave ◽  
Wave Spectra ◽  
Langmuir Waves ◽  
Solar Plasma ◽  
Transverse Electromagnetic

ABSTRACT In this paper, we consider the spectral dependences of transverse electromagnetic waves generated in solar plasma at the coalescence of Langmuir waves. It is shown that different spectra of Langmuir waves lead to characteristic types of transversal electromagnetic wave spectra, what makes it possible to diagnose the features of the spectra of Langmuir waves generated in solar plasma.

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