Uniform fuel target implosion in heavy ion inertial fusion

9th International Conference on Inertial Fusion Sciences and Applications

Kawata, S.^1 ; Karino, T.^1 ; Kondo, S.^1 ; Iinuma, T.^1 ; Barada, D.^1 ; Ma, Y.Y.^1,2 ; Ogoyski, A.I.^3

Utsunomiya University, Utsunomiya

321-8585, Japan^1

National University of Defence Technology, Changsha, China^2

Techinical University of Varna, Varna

9010, Bulgaria^3

关键词: Density gradients;    Energy absorbers;    Fusion power plant;    Heavy ion inertial fusion;    Non-uniformities;    Radiation energy;    Rayleigh-Taylor instabilities;    Target implosions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012029/pdf
DOI  :  10.1088/1742-6596/717/1/012029

来源: IOP

【 摘 要 】

For a steady operation of a fusion power plant the target implosion should be robust against the implosion non-uniformities. In this paper the non-uniformity mitigation mechanisms in the heavy ion beam (HIB) illumination are discussed in heavy ion inertial fusion (HIF). A density valley appears in the energy absorber, and the large-scale density valley also works as a radiation energy confinement layer, which contributes to the radiation energy smoothing for the HIB illumination non-uniformity. The large density-gradient scale, which is typically ∼500μm in HIF targets, also contributes to a reduction of the Rayleigh- Taylor instability growth rate. In HIF a wobbling HIBs illumination would also reduce the Rayleigh-Taylor instability growth and to realize a uniform implosion.