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In inertial fusion, one of scientific issues is to reduce an implosionnon-uniformity of a spherical fuel target. The implosion non-uniformity iscaused by several factors, including the driver beam illuminationnon-uniformity, the Rayleigh-Taylor instability (RTI) growth, etc. In thispaper we propose a new control method to reduce the implosion non-uniformity;the oscillating implosion acceleration dg(t) is created by pulsating anddephasing heavy ion beams (HIBs) in heavy ion inertial fusion (HIF). The dg(t)would reduce the RTI growth effectively. The original concept of the non-uniformity control in inertial fusion was proposed in (Kawata, et al., 1993).In this paper it was found that the pulsating and dephasing HIBs illuminationprovide successfully the controlled dg(t) and that dg(t) induced by thepulsating HIBs reduces well the implosion non-uniformity. Consequently thepulsating HIBs improve a pellet gain remarkably in HIF.

Control of fuel target implosion non-uniformity in heavy ion inertial fusion