High Energy Density Physics ( IF 1.6 ) Pub Date : 2020-05-23 , DOI: 10.1016/j.hedp.2020.100821 Satoru Shokita , Akifumi Yogo , Seyed R. Mirfayzi , Yuki Honoki , Daniil Golovin , Takashi Ishimoto , Zechen Lan , Kazuki Matsuo , Takato Mori , Kazuki Okamoto , Hideo Nagatomo , Hiroaki Nishimura , Yasuhiko Sentoku , Kohei Yamanoi , Ryosuke Kodama
In order to enhance the conversion efficiency of ultra-intense laser energy into plasma leading to ion acceleration, we have performed an experiment with over-picosecond laser pulses having a relativistic intensity interacting with foam targets. We adjust the prepulse of the laser to control the plasma density near the critical density. The combination of hydrodynamic and particle-in-cell simulations suggest that the region of high energy density is induced in the near-critical plasma, leading to enhance the proton energy up to 23 MeV with the laser intensity of 6 × 1018 W/cm2.
中文翻译:
通过超过皮秒的激光脉冲与接近临界密度的泡沫靶标相互作用观察MeV能量离子
为了提高超强激光能量转换成等离子体的效率,从而导致离子加速,我们进行了一项实验,使用了皮秒级以上的相对脉冲强度与泡沫靶相互作用的激光脉冲。我们调整激光的预脉冲以将等离子体密度控制在临界密度附近。流体动力学和细胞内颗粒模拟的结合表明,在近临界等离子体中感应出高能量密度区域,从而在6×10 18 W / cm的激光强度下将质子能量提高至23 MeV。2。