Study on the transport of a relativistic electron beam in plasmas

8th International Conference on Inertial Fusion Sciences and Applications

Cai, Hong-Bo^1,2 ; Zhu, Shao-Ping^1 ; He, X.T.^1,2

Institute of Applied Physics and Computational Mathematics, Beijing

100094, China^1

Center for Applied Physics and Technology, Peking University, Beijing

100871, China^2

关键词: Collimated beams;    Compressed cores;    Fast electron beam;    Fast electrons;    Fast ignition;    Ignition lasers;    Laser intensities;    Relativistic electron beam;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012007/pdf
DOI  :  10.1088/1742-6596/688/1/012007

来源: IOP

【 摘 要 】

In the fast ignition scheme, in order to deliver enough energy (10kJ) into the pellet in 10ps, the ignition laser beam should reach the intensity of I0∼ 1020W/cm2if the coupling from the laser to the core plasma is about 20% for a well-collimated beam. However, studies have shown that the electron divergence increases with the laser intensity. Of particular importance is the possibility of collimating the fast electron beams with the size of the compressed core. In this work, we will introduce two ways to obtain the collimated electrons: 1) collimate fast electrons in specially engineered targets with the spontaneously generated magnetic field during its transportation; 2) collimate fast electrons with imposed magnetic field.