Electron beam guiding by external magnetic fields in imploded fuel plasma

9th International Conference on Inertial Fusion Sciences and Applications

Johzaki, T.^1 ; Sentoku, Y.^2 ; Nagatomo, H.^3 ; Sunahara, A.^4 ; Sakagami, H.^5 ; Fujioka, S.^3 ; Shiraga, H.^3 ; Endo, T.^1

Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima

739-8527, Japan^1

Department of Physics, University of Nevada Reno, Reno

NV

89557, United States^2

Institute of Laser Engineering, Osaka University, Osaka, Suita

565-0871, Japan^3

Institute for Laser Technology, Osaka, Suita

565-0871, Japan^4

National Institute for Fusion Science, Toki, Gifu

509-5292, Japan^5

关键词: External magnetic field;    Fast electron beam;    Fast electron generation;    Fast electron transport;    Fast ignition laser fusion;    Heating efficiencies;    Longitudinal magnetic fields;    Magnetic field profile;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012025/pdf
DOI  :  10.1088/1742-6596/717/1/012025

来源: IOP

【 摘 要 】

For enhancing the core heating efficiency in fast ignition laser fusion, we proposed the fast electron beam by externally-applied the kilo-tesla (kT) class longitudinal magnetic field. We evaluated the imploded core and the magnetic field profiles formed through the implosion dynamics by resistive MHD radiation hydro code. Using those profiles, the guiding effect was evaluated by fast electron transport simulations, which shows that in addition to the feasible field configuration (moderate mirror ratio), the kT-class magnetic field is required at the fast electron generation point. In this case, the significant enhancement in heating efficiency is expected.