Dynamic Stabilization of the Ablative Rayleigh-Taylor Instability for Heavy Ion Fusion
Authors: Hong Qin, Ronald C. Davidson and B. Grant Logan
Abstract:
Dynamic stabilization of the ablative Rayleigh-Taylor instability of a heavy
ion fusion target induced by a beam wobbling system is studied. Using
a sharp-boundary model and Courant-Synder theory, it is shown, with an
appropriately chosen modulation waveform, that the instability can be sta-
bilized in certain parameter regimes. It is found that the stabilization e ect
has a strong dependence on the modulation frequency and the waveform.
Modulation with frequency comparable to the instability growth rate is the
most e ective in terms of stabilizing the instability. A modulation with two
frequency components can result in a reduction of the growth rate larger than
the sum of that due to the two components when applied separately.
__________________________________________________
Submitted to: Nuclear Instruments and Methods in Physics Research (October 2012)
__________________________________________________
Download PPPL-4824 (pdf 659 KB 16 pp)
__________________________________________________