High gain target design and optimization of implosion trajectory for stable implosion

高增益目标设计和内爆轨迹优化以实现稳定内爆

• 批准号: 15560714
• 负责人: MURAKAMI Masakatsu
• 金额: $ 1.22万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560714/
• 关键词: Inertial fusion; Rayleigh-Taylor instabilit; Theoretical model; Rocket equation; Numerical simulation; 数値シミュレーション; レーザー核融合; 爆縮; 流体シミュレーション; 理論・シミュレーション; 低エントロピー圧縮; テーラードパルス

A new scheme for fast ignition is proposed, in which the compressed DT main fuel is ignited by impact collision of another fraction of separately imploded DT fuel, which is accelerated in the hollow conical target to hyper-velocities in the order of 10^8 cm/sec. Its kinetic energy is directly converted into thermal energy corresponding to temperatures > 5 keV on the collision with the main fuel, and this self-heated portion plays the role of igniter. A preliminary two-dimensional radiation-hydrodynamic simulation shows substantial heating of the compressed core and thus the feasibility of the new scheme. High energy coupling efficiency, no need for a PW laser, and affordability of investigation in laboratories under rather well established physical understanding and experimental know-how - those are considered to be the notable advantages of the present scheme.

提出了一种新的快速点火方案，即压缩后的DT主燃料与另一部分单独内爆的DT燃料撞击点火，使其在中空圆锥靶中加速到10 8 cm/s量级的超高速。它的动能在与主燃料碰撞时直接转化为与温度&5keV对应的热能，而这个自热部分起着点火器的作用。初步的二维辐射-流体力学模拟表明，压缩堆芯有很大的加热，因此新方案是可行的。能量耦合效率高，不需要PW激光器，以及在对物理和实验技术有较好了解的情况下，实验室可以负担得起研究--这些被认为是本方案的显著优点。

项目成果

Ion energy spectrum of expanding laser-plasma with limited mass

• DOI: 10.1063/1.1928247
• 发表时间: 2005-06-01
• 期刊: PHYSICS OF PLASMAS
• 影响因子: 2.2
• 作者: Murakami, M;Kang, YG;Nishimura, H
• 通讯作者: Nishimura, H

Self-Similar Gravitational Collapse of Radiatively Cooling Spheres

辐射冷却球体的自相似引力塌缩

• 发表时间: 2004
• 期刊: Astrophyscal J 607
• 作者: M.Murakami;K.Nishihara;T.Hanawa
• 通讯作者: T.Hanawa

Suppression of the Rayleigh-Taylor instability and its implication for the impact ignition

瑞利-泰勒不稳定性的抑制及其对冲击点火的影响

• 发表时间: 2004
• 期刊: Plasma Phys.Control.Fusion 46
• 作者: H.Azechi;H.Shiraga;M.Nakai;K.Shigemori;S.Fujioka;T.Sakaiya;Y.Tamari;K.Ohtani;M.Murakami;A.Sunahara;H.Nagatomo;K.Nishihara;N.Miyanaga;Y.Izawa
• 通讯作者: Y.Izawa

実用新案登録

实用新型注册

• 发表时间: 2004

「研究成果報告書概要(欧文)」より

摘自《研究结果报告摘要（欧洲）》

• 发表时间: 2006
• 期刊: Seibutsu Butsuri 46(1)
• 作者: Yasushi Shigeri;Keiko Shimamoto
• 通讯作者: Keiko Shimamoto