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Target implosion uniformity in heavy-ion fusion

Published online by Cambridge University Press:  28 November 2016

T. Karino ,
S. Kawata ,
S. Kondo ,
T. Iinuma ,
T. Kubo ,
H. Kato  and
A. I. Ogoyski
T. Karino*
Affiliation:
Utsunomiya University, Utsunomiya, Graduate school of engineering, Tochigi 321-8585, Japan
S. Kawata
Affiliation:
Utsunomiya University, Utsunomiya, Graduate school of engineering, Tochigi 321-8585, Japan
S. Kondo
Affiliation:
Utsunomiya University, Utsunomiya, Graduate school of engineering, Tochigi 321-8585, Japan
T. Iinuma
Affiliation:
Utsunomiya University, Utsunomiya, Graduate school of engineering, Tochigi 321-8585, Japan
T. Kubo
Affiliation:
Utsunomiya University, Utsunomiya, Graduate school of engineering, Tochigi 321-8585, Japan
H. Kato
Affiliation:
Utsunomiya University, Utsunomiya, Graduate school of engineering, Tochigi 321-8585, Japan
A. I. Ogoyski
Affiliation:
Varna Technical University, Department of Physics, Varna 9010, Bulgaria
*
Address correspondence and reprint requests to: T. Karino, Utsunomiya University, Utsunomiya, Tochigi 321-8585, Japan. E-mail: [email protected]
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Abstract

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.

Keywords

Heavy-ion beamImplosion uniformityInertial confinement fusionNon-uniformity mitigationRayleigh–Taylor instability
Type
Research Article
Information
Laser and Particle Beams , Volume 34 , Issue 4 , December 2016 , pp. 735 - 741
Copyright
Copyright © Cambridge University Press 2016 

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References

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