Effect of Femtosecond Prepulse with Threshold Intensity for Optical Field lonization on Electron Acceleration and Propagation of Intense Laser Pulse in Plasma

Shin-ichi Masuda; Eisuke Miura

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Effect of Femtosecond Prepulse with Threshold Intensity for Optical Field lonization on Electron Acceleration and Propagation of Intense Laser Pulse in Plasma

机译：具有阈值强度的飞秒预脉冲用于光场电离对等离子体中强激光脉冲电子加速和传播的影响

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The effect of a prepulse with femtosecond duration, which precedes an intense laser pulse by 4 ns, on electron acceleration and propagation of an intense laser pulse in a plasma is investigated using a helium gas jet. When the prepulse intensity exceeds 10~(15) W/cm~2, which is close to the threshold intensity for optical field ionization of helium, the maximum energy and number of accelerated electrons are significantly reduced. In addition, the amplitude of the plasma wave is relatively small, and the propagation length of the laser pulse is short. These results suggest that the preformed plasma produced by the femtosecond prepulse affects the electron acceleration and laser propagation. To investigate the effects of a preformed plasma, two-dimensional particle-in-cell simulations are carried out. The simulation results support the experimental results.

机译：使用氦气射流研究了飞秒持续时间的脉冲（在强激光脉冲之前4 ns之前）对电子加速和强激光脉冲在等离子体中的传播的影响。当预脉冲强度超过10〜（15）W / cm〜2，接近氦气光场电离的阈值强度时，最大能量和加速电子数量将大大降低。另外，等离子体波的振幅相对较小，并且激光脉冲的传播长度较短。这些结果表明，飞秒预脉冲产生的预形成等离子体会影响电子加速度和激光传播。为了研究预制等离子体的影响，进行了二维单元格内颗粒模拟。仿真结果支持了实验结果。

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《Japanese journal of applied physics》 |2010年第9issue1期|p.096401.1-096401.9|共9页
作者
Shin-ichi Masuda; Eisuke Miura;
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National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan;

rnNational Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan;

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2. Electron Acceleration and Bunch Generation by Intense Femtosecond Laser Pulse in Preplasma of a Target [J] . 刘明萍, 汪庆年, 邓素辉, 理论物理通讯：英文版 . 2010,第008期

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3. Wakefield generation and electron acceleration by intense super-Gaussian laser pulses propagating in plasma [J] . Jha P., Saroch A., Mishra R.K. Laser and Particle Beams . 2013,第4期

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机译：光学研究以最小化飞秒激光脉冲和电子束之间的电子束到达时间抖动，用于激光驱动的等离子体韦克菲尔德换热器
5. Interaction of intense laser pulses with gaseous media: Several exotic propagation effects in the femtosecond regime. [D] . Alexeev, Ilya Semenovich. 2003

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6. All optical dual stage laser wakefield acceleration driven by two-color laser pulses [O] . Vishwa Bandhu Pathak, Hyung Taek Kim, J. Vieira, -1

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7. Electron Acceleration and the Propagation of Ultrashort High-Intensity Laser Pulses in Plasmas [O] . Wang, Xiaofang, Krishnan, Mohan, Saleh, Ned, 2000

机译：电子加速和超短高强度激光脉冲在等离子体中的传播

Effect of Femtosecond Prepulse with Threshold Intensity for Optical Field lonization on Electron Acceleration and Propagation of Intense Laser Pulse in Plasma

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