منابع مشابه
Coalescence of magnetic islands in the low-resistivity, Hall-MHD regime.
The coalescence of magnetic islands in the low-resistivity eta, Hall-MHD regime is studied. The interaction between the ion inertial length d(i) and the dynamically evolving current sheet scale length deltaJ is established. Initially, d(i) << deltaJ. If eta is such that deltaJ dynamically thins down to d(i) prior to the well-known sloshing phenomena, then sloshing is avoided. This results in et...
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During submonolayer homoepitaxy, instability in the shapes of growing two-dimensional islands can develop due to the diffusion-limited aggregation of deposited adatoms at their edges. However, in metal (100) systems, periphery diffusion is typically efficient, quenching this shape instability, and resulting in simple near-square or near-rectangular shapes of isolated islands. Despite this featu...
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متن کاملNatural velocity of magnetic islands.
The phase velocity of magnetic islands is calculated in the semicollisional regime with cold ions. Two solution branches arise, corresponding to islands propagating with the ions and with the electrons. For the ion branch the phase velocity and the polarization current are small. For the electron branch, the phase velocity depends on the ratio of W, the half-width of the island, and rho(s), the...
متن کاملEffect of sheared flow on magnetic islands
The effect of sheared flow on a magnetic island is examined. In contrast to the density and temperature gradients which are flattened for sufficiently wide islands, it is found that the velocity gradient persists inside the separatrix whenever the constant-! approximation is satisfied. It follows that velocity shear has a negligible effect on island amplitude in that approximation. The effect o...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1980
ISSN: 0031-9007
DOI: 10.1103/physrevlett.44.1069