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Vertical Instability in KEK Booster
IEEE Transactions on Nuclear Science, 1983In the KEK Booster Synchrotron, from one msec after injection to extraction timing, beam intensity is stable, though it is reduced to about one half during one msec after injection. An instability of the vertical direction is one of the candidates of the beam loss.
M. Suetake +5 more
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Instabilities in vertically vibrated fluid-grain systems
The European Physical Journal E, 2007When a bed of fluid-immersed fine grains is exposed to vertical vibration a wealth of phenomena may be observed. At low frequencies a horizontal bed geometry is generally unstable and the bed breaks spatial symmetry, acquiring a tilt. At the same time it undergoes asymmetric granular convection.
P J, King +5 more
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Passive Control of the Vertical Instability in Intor
Fusion Technology, 1985In the international tokamak reactor (INTOR), the problem of the passive control of the vertical instability is to be solved by means of suitably shaped saddle coils to be embedded in the blanket structure. The efficiency of such a system depends on the characteristics of the passive conductors and on the plasma equilibrium as well as on the type of ...
S. BOBBIO +4 more
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Vertical positional instability in JT-60SU
Fusion Engineering and Design, 1998Abstract JT-60SU has been designed as an experimental device to establish an integrated scientific basis of steady-state tokamak operation. The high elongation of plasma cross section is employed to keep the safety factor at the plasma surface high for high current operation.
G. Kurita +3 more
exaly +2 more sources
Baroclinic Instability in Vertically Discrete Systems
Journal of the Atmospheric Sciences, 1988The Charney-Phillips (1953) standard vertical grid for quasi-geostrophic models is compared with the Lorenz (1960) vertical grid (which departs from the standard grid by carrying horizontal velocity and potential temperature at same levels) in the framework of the quasi-geostrophic potential vorticity equation and baroclinic instability.
Akio Arakawa, Shrinivas Moorthi
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Meandering Instability of a Vertical Plume
Journal of Engineering Mechanics, 2009The meandering instability of a two-dimensional vertical plume is considered in this paper. The base flow profile is derived using boundary layer approximation and similarity hypothesis, in the spirit of Blasius boundary layer solution. Using linear stability analysis, we derive a modified version of the Orr-Sommerfeld equation governing the ...
Albert Dai, Marcelo H. García
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Fast calculation of the tokamak vertical instability
Plasma Physics and Controlled Fusion, 2022Abstract There has been recent interest in fast calculations of the tokamak axisymmetric vertical instability for real time feedback control purposes. It is shown that the maximum eigenvalue for the basic rigid version of this stability problem can be obtained by finding the positive root to a simple scalar function. This function can be
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