Magnetized Fast ignition (MFI) and Laser Plasma Interactions in Strong Magnetic Field

8th International Conference on Inertial Fusion Sciences and Applications

Mima, Kunioki^1 ; Johzaki, T.^2 ; Honrubia, J.^3 ; Nagatomo, H.^4 ; Taguchi, T.^5 ; Sunahara, A.^6 ; Sakagami, H.^7 ; Fujioka, S.^4 ; Logan, G.^4

Graduate School for the Creation of New Photonics Industries, Hamamatsu, Japan^1

Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Japan^2

School of Aeronautics, Technical University of Madrid, Madrid, Spain^3

Institute of Laser Engineering, Osaka University, Suita, Osaka, Japan^4

Faculty of Engineering, Setsunan University, Neyagawa Osaka, Japan^5

Institute for Laser Technology, Osaka, Japan^6

National Institute for Fusion Science, Toki, Japan^7

关键词: Coupling efficiency;    Electron energies;    External magnetic field;    Hot-electron transport;    Laser intensities;    Laser-plasma interactions;    Strong magnetic fields;    Weibel instability;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012066/pdf
DOI  :  10.1088/1742-6596/688/1/012066

来源: IOP

【 摘 要 】

In this paper, magnetized fast ignition (MFI) is proposed for improving the coupling efficiency of a heating laser to a core plasma. In the MFI, the external magnetic field is applied to reduce the hot electron energy and focus the dense hot electron flux to the core. The external magnetic field higher than 100T is generated by the laser driven coil and it is amplified by the implosion. The magnetic field at the tip of the cone is expected to reach higher than 10kT and the laser plasma interaction and the hot electron transport are modified. As the results of applying the external magnetic field, hot electron energy is reduced to less than 5MeV for the laser intensity of 1020W/ cm2and the Weibel instability is suppressed to collimate the hot electron beam to the core.