scholarly journals Effect of resonance broadening on the evolution of the edge of a turbulent spectrum

1980 ◽  
Author(s):  
A.H. Kritz ◽  
N.J. Fisch ◽  
C.F.F. Karney
Keyword(s):  
Turbulent Spectrum ◽  
Resonance Broadening

Nonlinear propagation of whistler wave and turbulent spectrum in reconnection region of magnetopause

2017 ◽  
Vol 24 (9) ◽  
pp. 092902 ◽  
Author(s):  
R. P. Sharma ◽  
Neha Pathak ◽  
Nitin Yadav ◽  
Prachi Sharma
Keyword(s):  
Whistler Wave ◽  
Nonlinear Propagation ◽  
Reconnection Region ◽  
Turbulent Spectrum

Nonlinear Resonance Broadening and Shift due to Thermo-Optical Instability in Microsphere Resonators

2007 ◽  
Author(s):  
C. Schmidt ◽  
O. Egorov ◽  
A. Chipouline ◽  
T. Pertsch ◽  
F. Lederer ◽  
...  
Keyword(s):  
Nonlinear Resonance ◽  
Resonance Broadening

scholarly journals Field Localization and Density Cavitation in Low-Beta Plasmas

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Motilal Rinawa ◽  
Prashant Chauhan ◽  
Sintu Kumar ◽  
Manoj Kumar Singh ◽  
Hari Kumar Singh ◽  
...  
Keyword(s):  
Ponderomotive Force ◽  
Space Plasma ◽  
Density Fluctuations ◽  
Alfven Wave ◽  
Nonlinear Coupling ◽  
Auroral Region ◽  
Filamentous Structure ◽  
Inertial Alfvén Wave ◽  
Turbulent Spectrum ◽  
Field Localization

In the present paper, filamentous structure formation, associated turbulent spectrum, and density cavity formation phenomena have been investigated for low- β plasma β ≪ m e / m i applicable to the auroral region. A set of dimensionless equations governing the dynamics of three dimensionally propagating inertial Alfvén wave (3D-IAW) and perpendicularly propagating magnetosonic wave (PMSW) has been developed. Ponderomotive force due to 3D-IAW has been included in the dynamics of the PMSW. Numerical simulation has been performed to study the nonlinear coupling of these two waves. From the obtained results, we found that the field intensity localization takes place which may further lead to the additional dissipation/turbulence process for particle heating and acceleration in space plasma. The associated turbulent spectrum is obtained with scaling nearly k − 4.28 at smaller scales (in the dissipation range). Relevance of the obtained results with the observations reported by various spacecrafts such as Hawkeye and Heos 2 has been discussed. Also, density fluctuations (depletion) of ∼ 0.10   n 0 are calculated, which are consistent with the FAST spacecraft observation reported.

An Ocean Refractometer: Resolving Millimeter-Scale Turbulent Density Fluctuations via the Refractive Index

2006 ◽  
Vol 23 (1) ◽  
pp. 121-137 ◽  
Author(s):  
Matthew H. Alford ◽  
David W. Gerdt ◽  
Charles M. Adkins
Keyword(s):  
Refractive Index ◽  
Density Fluctuations ◽  
Inertial Subrange ◽  
Conductivity Measurements ◽  
Velocity Fluctuations ◽  
Fiber Motion ◽  
Turbulent Spectrum ◽  
Ocean Measurements ◽  
Fiberoptic Sensor ◽  
Better Than

Abstract A fiberoptic sensor has been constructed to measure oceanic density fluctuations via their refractive index signature. The resolution (Δz = 1 mm, Δt = 0.2 ms) and precision (Δn < 10−8, Δρ = 3.4 × 10−5 kg m−3) of the device are far better than other methods and are sufficient to resolve the entire turbulent spectrum. Spectra show the salinity Batchelor rolloff at levels undetectable via conductivity measurements. However, the low-wavenumber portion of the spectrum occupied by the turbulent inertial subrange (≈1 m–1 cm scales) is marred by noise resulting from fiber motion in response to turbulent velocity fluctuations. The technique is described, and the first ocean measurements are reported.

Resonance Broadening in Concentric Coupled Resonators based Metamaterials

2019 ◽  
Author(s):  
Deepak Kumar ◽  
Ravi Kumar Jain ◽  
Shahjahan ◽  
S. S. Prabhu ◽  
Dibakar Roy Chowdhury
Keyword(s):  
Coupled Resonators ◽  
Resonance Broadening
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