Dynamo Driven by Weak Plasma Turbulence
نویسندگان
چکیده
منابع مشابه
Dynamo driven by weak plasma turbulence
The dynamo mechanism driven by weak plasma turbulence, called the p-ω dynamo, is studied. Under the assumption of the uniform rotation of a celestial body, a dynamo equation is derived from the magnetic induction equation based on mean field electrodynamics. It is well known that differential rotation is indispensable for an α-ω dynamo to be operative. In contrast to the α-ω dynamo model, no ma...
متن کاملA galaxy dynamo by supernova-driven interstellar turbulence
Supernovae are the dominant energy source for driving turbulence within the interstellar plasma. Until recently, their effects on magnetic field amplification in disk galaxies remained a matter of speculation. By means of self-consistent simulations of supernova-driven turbulence, we find an exponential amplification of the mean magnetic field on timescales of a few hundred million years. The r...
متن کاملCross-scale Dynamo Action in Multiscale Plasma Turbulence
The interplay mechanism between electromagnetic (EM) and electrostatic (ES) turbulence is explored using direct gyrofluid simulations of mixed resistive magnetohydrodynamic (MHD) and ion-scale microinstability. With an elucidation based on a minimal model, we propose a new concept of cross-scale dynamo action induced by microturbulence as the mechanism responsible for the interaction between mu...
متن کاملMagnetorotational Turbulence and Dynamo in a Collisionless Plasma.
We present results from the first 3D kinetic numerical simulation of magnetorotational turbulence and dynamo, using the local shearing-box model of a collisionless accretion disk. The kinetic magnetorotational instability grows from a subthermal magnetic field having zero net flux over the computational domain to generate self-sustained turbulence and outward angular-momentum transport. Signifi...
متن کاملControl of drift wave turbulence by driven plasma currents
Submitted for the DPP09 Meeting of The American Physical Society Control of drift wave turbulence by driven plasma currents OLAF GRULKE, CHRISTIAN BRANDT, STEFAN ULLRICH, KIAN RAHBARNIA, THOMAS KLINGER, MPI for Plasma Physics, EURATOM Association, D-17491 Greifswald — The anomalous transport in the plasma edge of fusion devices is believed to be dominated by the drift wave instability, which is...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1993
ISSN: 0074-1809
DOI: 10.1017/s0074180900174212