2022-08-11 デラウェア大学 (UD)
レーザー駆動の爆縮に強力な磁場を適用し、これまで実験では未開拓だった方法で核融合反応を制御できる可能性がある。
＜関連情報＞
- https://www.udel.edu/udaily/2022/august/arijit-bose-physics-astronomy-nuclear-fusion-sandia-lab-grant/
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.128.195002
慣性核融合インプロージョンにおける強磁化電子・イオンの熱流と対称性に与える影響 Effect of Strongly Magnetized Electrons and Ions on Heat Flow and Symmetry of Inertial Fusion Implosions
A. Bose et al.
Physical Review Letters Published: 11 May 2022
DOI:https://doi.org/10.1103/PhysRevLett.128.195002
ABSTRACT
This Letter presents the first observation on how a strong, 500 kG, externally applied B field increases the mode-two asymmetry in shock-heated inertial fusion implosions. Using a direct-drive implosion with polar illumination and imposed field, we observed that magnetization produces a significant increase in the implosion oblateness (a 2.5× larger P2 amplitude in x-ray self-emission images) compared with reference experiments with identical drive but with no field applied. The implosions produce strongly magnetized electrons (ωeτe≫1) and ions (ωiτi>1) that, as shown using simulations, restrict the cross field heat flow necessary for lateral distribution of the laser and shock heating from the implosion pole to the waist, causing the enhanced mode-two shape.
