Electron transport estimated from electron spectra using electron spectrometer in LFEX laser target experiments

9th International Conference on Inertial Fusion Sciences and Applications

Ozaki, T.^1 ; Hata, M.^2 ; Matsuo, K.^2 ; Kojima, S.^2 ; Arikawa, Y.^2 ; Fujioka, S.^2 ; Sakagami, H.^1 ; Sunahara, A.^2 ; Nagatomo, H.^2 ; Johzaki, T.^3 ; Yogo, A.^2 ; Morace, A.^2 ; Zhang, Z.^2,4 ; Shiraga, H.^2 ; Sakata, S.^2 ; Nagai, T.^2 ; Abe, Y.^2 ; Lee, S.^2 ; Nakai, M.^2 ; Nishimura, H.^2 ; Azechi, H.^2

National Institute for Fusion Science, 322-6 Oroshi Toki, Gifu

509-5292, Japan^1

Institute of Laser Engineering, Osaka Univ., 2-6 Yamada-Oka, Suita, Japan^2

Hiroshima Univ., 1-4-1, Kagamiyama, Higashi-Hiroshima

739-8527, Japan^3

Japan Institute of Physics, Chinese Academy of Sciences, Beijing

100080, China^4

关键词: Electron energies;    Electron spectrometer;    Electron spectrum;    Electron transport;    External longitudinal magnetic fields;    External magnetic field;    High intense lasers;    Laser targets;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012043/pdf
DOI  :  10.1088/1742-6596/717/1/012043

来源: IOP

【 摘 要 】

Hot electrons which are generated from targets irradiated by a high-intense laser are measured by two electron spectrometers (ESMs). However, total electron energy observed by the ESM is only less than 1%. Hot electrons are confined by self-fields due to the huge current. When an external magnetic field of several hundred Tesla is applied during the laser irradiation on targets, the ESM signals always increase. In the simulation, the same result can be obtained. The reason is that the Alfvén limit can be mitigated due to the external longitudinal magnetic field.