Target implosion uniformity in heavy-ion fusion

被引:4
作者
Karino, T. [1 ]
Kawata, S. [1 ]
Kondo, S. [1 ]
Iinuma, T. [1 ]
Kubo, T. [1 ]
Kato, H. [1 ]
Ogoyski, A. I. [2 ]
机构
[1] Utsunomiya Univ, Grad Sch Engn, Utsunomiya, Tochigi 3218585, Japan
[2] Varna Tech Univ, Dept Phys, Varna 9010, Bulgaria
关键词
Heavy-ion beam; Implosion uniformity; Inertial confinement fusion; Non-uniformity mitigation; Rayleigh-Taylor instability; RAYLEIGH-TAYLOR INSTABILITY; DYNAMIC STABILIZATION;
D O I
10.1017/S0263034616000690
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this paper, the robustness of the dynamic instability mitigation mechanism is first examined, and then the instability mitigation phenomenon is demonstrated in a deuterium-tritium (DT) fuel target implosion by wobbling heavy-ion beams (HIBs). The results presented here show that the mechanism of the dynamic instability mitigation is rather robust against changes in the phase, the amplitude and the wavelength of the wobbling perturbation applied. In general instability would emerge from the perturbation of the physical quantity. Normally the perturbation phase is unknown, so that the instability growth rate is discussed. However, if the perturbation phase is known, the instability growth can be controlled by a superposition of perturbations imposed actively: if the perturbation is induced by, for example, a driving beam axis oscillation or wobbling, the perturbation phase could be controlled and the instability growth is mitigated by the superposition of the growing perturbations. In this paper, we realize the superposition of the perturbation by the wobbling HIBs' illumination onto a DT fuel target in heavy-ion inertial fusion (HIF). Our numerical fluid implosion simulations present that the implosion non-uniformity is mitigated successfully by the wobbling HIBs illumination in HIF.
引用
收藏
页码:735 / 741
页数:7
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