Effects of Laser Parameters on Fast Electron Generation in a Multihole Array Target
JI Yan-Ling1,2, DUAN Tao2, JIANG Gang3, WU Wei-Dong1, TANG Yong-Jian1**
1Research Center of Laser Fusion, China Academy of Engineering Physics, PO Box 919-987, Mianyang 621900 2Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010 3Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065
Effects of Laser Parameters on Fast Electron Generation in a Multihole Array Target
JI Yan-Ling1,2, DUAN Tao2, JIANG Gang3, WU Wei-Dong1, TANG Yong-Jian1**
1Research Center of Laser Fusion, China Academy of Engineering Physics, PO Box 919-987, Mianyang 621900 2Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010 3Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065
摘要The effects of laser parameters on the production of fast electrons from laser-multihole array target interaction are investigated theoretically via two-dimensional particle-in-cell simulations. The results show that the fast electron temperature is scaled by I1/2λ2 with I and λ being the laser intensity and wavelength. When the laser intensity reaches 2.14×1020 W⋅cm−2, a typical bi-Maxwellian energy distribution is observed. The slope temperature of the low-energy component fits the linear scaling Th∼I1/2 well. The high-energy component has an increased slope temperature comparable to ponderomotive potential scaling law. In addition, the electron temperature rises linearly with the pulse duration, Th∼Δt. The divergence angle of the fast electrons increases with laser intensity and pulse duration, but is independent of laser wavelength.
Abstract：The effects of laser parameters on the production of fast electrons from laser-multihole array target interaction are investigated theoretically via two-dimensional particle-in-cell simulations. The results show that the fast electron temperature is scaled by I1/2λ2 with I and λ being the laser intensity and wavelength. When the laser intensity reaches 2.14×1020 W⋅cm−2, a typical bi-Maxwellian energy distribution is observed. The slope temperature of the low-energy component fits the linear scaling Th∼I1/2 well. The high-energy component has an increased slope temperature comparable to ponderomotive potential scaling law. In addition, the electron temperature rises linearly with the pulse duration, Th∼Δt. The divergence angle of the fast electrons increases with laser intensity and pulse duration, but is independent of laser wavelength.
JI Yan-Ling;DUAN Tao;JIANG Gang;WU Wei-Dong;TANG Yong-Jian**
. Effects of Laser Parameters on Fast Electron Generation in a Multihole Array Target[J]. 中国物理快报, 2011, 28(3): 35201-035201.
JI Yan-Ling, DUAN Tao, JIANG Gang, WU Wei-Dong, TANG Yong-Jian**
. Effects of Laser Parameters on Fast Electron Generation in a Multihole Array Target. Chin. Phys. Lett., 2011, 28(3): 35201-035201.
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