- Speaker
- Prof. Xian-Tu He
- Beijing Institute of Applied Physics and Computational Mathematics
- Abstract
An indirect-direct hybrid-drive work-dominated hotspot ignition scheme for inertial confinement fusion is proposed: a layered fuel capsule inside a spherical hohlraum with an octahedral symmetry is compressed first by indirect-drive soft-x rays (radiation) and then by direct-drive lasers in last pulse duration. In this scheme, an enhanced shock and a follow-up compression wave for ignition with hybrid pressure far greater than the radiation ablation pressure are driven by the direct-drive lasers, and provide large pdV work to the hotspot to perform the work-dominated ignition. The numerical simulations show that the enhanced shock stops the reflections of indirect-drive shock at the main fuel-hotspot interface, and therefore significantly suppresses the hydrodynamic instabilities and asymmetry. Based on the indirect-drive implosion dynamics the hotspot is further compressed and heated by the enhanced shock and follow-up compression wave, resulting in the work-dominated hotspot ignition and burn. The fusion yield of 15 MJ using total laser energy of 1.32 MJ is achieved.
- About the Speaker
贺贤土,理论物理学家,中国科学院院士,研究员、博士生导师。1962 年浙江大学物理系理论物理专业毕业后进入中国工程物理研究院,在北京应用物理与计算数学研究所工作。曾任美国马利兰大学高级访问学者、北京应用物理与计算数学研究所副所长、国家863计划惯性约束聚变首席科学家、中国科学院数理学部主任和中国科学院学部主席团成员和执行委员会成员等职。现任北京应用物理与计算数学研究所研究员和北京大学应用物理与技术中心主任。在国家重大任务的物理理论研究、设计及实验室模拟研究中完成了大量开拓性工作。曾组织领导和参加了我国在惯性约束聚变研究领域的研究工作,提出了我国惯性约束聚变发展战略,取得了多项物理科学和技术重大成果, 建立了我国独立自主的研究体系,为我国相关战略研究计划的实施奠定了重要基础。在基础研究方面,主要从事高能量密度物理、非平衡统计物理、激光与等离子体相互作用、激光核聚变物理和非线性科学方面的研究。发表了200 多篇学术论文,多次在国际学术会议上作大会邀请报告。获国家自然科学奖二等奖一项,国家科技进步奖一等、二等奖各一项,部委级奖八项。1992年光华科技基金会一等奖;2000 年获何梁何利奖; 2001 年获国家“863 计划”突出贡献先进个人奖; 2010年竺可桢奖。
- Date&Time
- 2015-04-16 3:30 PM
- Location
- Room: Conference Room I