数理论坛第95期

报告题目：Compact, Laser Driven, Rapid, Volume Ignition

报告人：Laszlo P. Csernai 教授

报告时间：2019年6月3日（星期一）15：00-16：30

地 点： 东区教学楼A1104报告厅

简 介：Laszlo P. Csernai 教授是挪威科学院院士，匈牙利科学院外籍院士，原欧洲科学院物理工程部主席，国际高能物理领域的著名学者，挪威卑尔根大学（Norway Bergen University）Laszlo P. Csernai 教授。

报告内容简介: Inertial Confinement Fusion is a promising option to provide massive, clean, and affordable energy for humanity in the future. The present status of research and development is hindered by hydrodynamic instabilities occurring at the intense compression of the target fuel by energetic laser beams. A recent proposal Csernai et al. (2018) combines advances in two fields: detonations in relativistic fluid dynamics and radiative energy deposition by plasmonic nano-shells. The initial compression of the target pellet can be eliminated or decreased, not to reach instabilities. A final and more energetic laser pulse can achieve rapid volume ignition, which should be as short as the penetration time of the light across the target. In the present study, we discuss a flat fuel target irradiated from both sides simultaneously. Here we propose an ignition energy with smaller compression, largely increased entropy and temperature increase, and instead of external indirect heating and huge energy loss, a maximized internal heating in the target with the help of recent advances in nano-technology. The reflectivity of the target can be made negligible, and the absorptivity can be increased by one or two orders of magnitude by plasmonic nano-shells embedded in the target fuel. Thus, higher ignition temperature and radiation dominated dynamics can be achieved. Here most of the interior will reach the ignition temperature simultaneously based on the results of relativistic fluid dynamics. This makes the development of any kind of instability impossible, which up to now prevented the complete ignition of the target.

邀请人：物理系 陈 刚 教授