Diagnosing the fast-heating process of the double-cone ignition scheme with X-ray spectroscopy  

作　　者：Yu Dai Haochen Gu Ke Fang Yihang Zhang Chenglong Zhang Yufeng Dong Zhe Zhang Xiaohui Yuan Yutong Li Jie Zhang 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing,China [3]State Key Laboratory for Tunnel Engineering,China University of Mining and Technology,Beijing,China [4]Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai,China [5]Songshan Lake Materials Laboratory,Dongguan,China [6]Key Laboratory for Laser Plasma(MOE)and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai,China

出　　处：《High Power Laser Science and Engineering》2024年第4期105-112,共8页高功率激光科学与工程（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant Nos.XDA25010100,XDA25010300 and XDA25030100);in part by the National Natural Science Foundation of China(Grants No.11827807)。

摘　　要：In the double-cone ignition scheme of inertial confinement fusion,the head-on collision of two compressed fuel jets from the cone-tips forms an isochoric plasma,which is then heated suddenly by a MeV relativistic electron beam produced by ultra-intense picosecond laser pulses.This fast-heating process was studied experimentally at the ShenguangⅡupgrade laser facility.By observing temporal-resolved X-ray emission and the spatial-resolved X-ray spectrum,the colliding process and heating process are carefully studied.The colliding plasma was imaged to have dimensions of approximately86μm in the implosion direction and approximately 120μm in the heating direction.By comparing the simulated plasma X-ray spectrum with experimental data,the electron temperature of the heated plasma was found to rapidly increase to 600±50 eV,almost doubling the temperature achieved before the heating laser incidence.

关 键 词：direct drive fast ignition inertial confinement fusion plasma spectroscopy 

分 类 号：TL632[核科学技术—核技术及应用]