Influence of thermal conduction on MHD waves properties in thermally unstable plasma

2016 ◽  
Vol 52 (1-2) ◽  
pp. 199-208 ◽  
Author(s):  
N. E. Molevich ◽  
D. S. Ryashchikov ◽  
D. I. Zavershinskiy
Keyword(s):  
Thermal Conduction ◽  
Mhd Waves ◽  
Unstable Plasma

Influence of thermal conduction on MHD waves properties in thermally unstable plasma

2016 ◽  
Vol 52 (1) ◽  
pp. 199-208 ◽  
Author(s):  
N. E. Molevich ◽  
◽  
D. S. Ryashchikov ◽  
D. I. Zavershinskiy ◽  
◽  
...  
Keyword(s):  
Thermal Conduction ◽  
Mhd Waves ◽  
Unstable Plasma

Electron-Cyclotron Maser Emission and Propagation in Solar Microwave Spike Bursts

1992 ◽  
Vol 10 (1) ◽  
pp. 61-63
Author(s):  
P. A. Robinson ◽  
Z. Kuncic
Keyword(s):  
Ray Tracing ◽  
Mode Conversion ◽  
Second Harmonic ◽  
Mhd Waves ◽  
Cyclotron Maser ◽  
Solar Microwave ◽  
Maser Radiation ◽  
Improved Model ◽  
Spike Bursts ◽  
Unstable Plasma

AbstractAn improved model of the generation and propagation of cyclotron-maser radiation in flaring loops is discussed, which incorporates competition between driving of the maser instability and maser-induced relaxation of the unstable plasma. This model enables previous large discrepancies between the build-up, relaxation, and observed timescales to be resolved for solar microwave spike bursts. Also, it implies that emission via fundamental o-mode and second-harmonic x-mode instabilities can compete more effectively against fundamental x-mode emission than has previously been thought. Propagation of the radiation to the observer is discussed both theoretically and with reference to ray tracing calculations and it is shown that the observed levels of MHD waves in the corona make it significantly easier for the radiation to escape than in the unperturbed case. In the absence of nonlinear processes or mode conversion we argue that the escaping radiation is generated by either fundamental o-mode or second-harmonic x-mode instabilities.

scholarly journals Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Nagendra Kumar ◽  
Anil Kumar ◽  
Himanshu Sikka ◽  
Pradeep Kumar
Keyword(s):  
Dispersion Relation ◽  
Thermal Conduction ◽  
Energy Equation ◽  
Mhd Waves ◽  
Local Theory ◽  
Solar Prominence ◽  
Magnetoacoustic Waves ◽  
Unbounded Medium ◽  
Radiative Losses ◽  
Fast Waves

We study the effect of shear flow on the time damping of linear nonadiabatic magnetoacoustic waves in a solar prominence. We consider a homogeneous, isothermal, and unbounded medium permeated by a uniform magnetic field. The adiabaticity is removed by including the optically thin radiative losses, thermal conduction, and heating term in energy equation. We present a local theory of MHD waves to obtain a dispersion relation. The dispersion relation is solved numerically to study the time damping of these waves. It is found that flow influences the damping time and damping per period of both the slow and fast waves significantly. Damping time and damping per period of slow waves are very much higher than the damping time and damping per period of fast waves.

scholarly journals Thermal conduction in a mirror-unstable plasma

2016 ◽  
Vol 460 (1) ◽  
pp. 467-477 ◽  
Author(s):  
S. V. Komarov ◽  
E. M. Churazov ◽  
M. W. Kunz ◽  
A. A. Schekochihin
Keyword(s):  
Thermal Conduction ◽  
Unstable Plasma

Linear Visco-Resistive Computations of Magnetohydrodynamic Waves: I. The Code and Test Cases

1994 ◽  
Vol 144 ◽  
pp. 503-505
Author(s):  
R. Erdélyi ◽  
M. Goossens ◽  
S. Poedts
Keyword(s):  
Resonant Absorption ◽  
Numerical Code ◽  
Mhd Waves ◽  
Test Cases ◽  
Numerical Accuracy ◽  
Element Discretization ◽  
Flux Tubes ◽  
Magnetohydrodynamic Waves ◽  
Viscosity Coefficients ◽  
Magnetic Flux Tubes

AbstractThe stationary state of resonant absorption of linear, MHD waves in cylindrical magnetic flux tubes is studied in viscous, compressible MHD with a numerical code using finite element discretization. The full viscosity tensor with the five viscosity coefficients as given by Braginskii is included in the analysis. Our computations reproduce the absorption rates obtained by Lou in scalar viscous MHD and Goossens and Poedts in resistive MHD, which guarantee the numerical accuracy of the tensorial viscous MHD code.

Unstable Plasma Thalidomide Concentration in Patients with Refractory Multiple Myeloma

2004 ◽  
Vol 10 (3) ◽  
pp. 132-136 ◽  
Author(s):  
TOMOKO KODAMA ◽  
RYUYA HORIUCHI ◽  
NORIFUMI TSUKAMOTO ◽  
YOSHIHISA NOJIMA ◽  
HIROKAZU MURAKAMI
Keyword(s):  
Multiple Myeloma ◽  
Refractory Multiple Myeloma ◽  
Unstable Plasma

Theory of low-scale mhd waves in the near equatorial region of the earth plasmasphere

2001 ◽  
Vol 7 (2s) ◽  
pp. 74-83
Author(s):  
O.S. Burdo ◽  
◽  
O.K. Cheremnykh ◽  
O.P. Verkhoglyadova ◽  
◽  
...  
Keyword(s):  
Equatorial Region ◽  
Mhd Waves ◽  
The Earth

NEAR-JUNCTION THERMAL MANAGEMENT: THERMAL CONDUCTION IN GALLIUM NITRIDE COMPOSITE SUBSTRATES

2015 ◽  
Vol 18 ◽  
pp. 7-45 ◽  
Author(s):  
Jungwan Cho ◽  
Zijian Li ◽  
Mehdi Asheghi ◽  
Kenneth E. Goodson
Keyword(s):  
Gallium Nitride ◽  
Thermal Management ◽  
Thermal Conduction ◽  
Composite Substrates
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