Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Phys Rev Lett. 2013 May 24;110(21):215004. doi: 10.1103/PhysRevLett.110.215004. Epub 2013 May 21.
We experimentally demonstrate a notably enhanced acceleration of protons to high energy by relatively modest ultrashort laser pulses and structured dynamical plasma targets. Realized by special deposition of snow targets on sapphire substrates and using carefully planned prepulses, high proton yields emitted in a narrow solid angle with energy above 21 MeV were detected from a 5 TW laser. Our simulations predict that using the proposed scheme protons can be accelerated to energies above 150 MeV by 100 TW laser systems.
我们通过相对适度的超短激光脉冲和结构化动态等离子体靶实验证明了质子能量的显著加速。通过在蓝宝石衬底上特殊沉积雪靶并用仔细规划的预脉冲实现，并从 5TW 激光中检测到在一个狭窄的立体角内发射的具有超过 21 MeV 能量的高质子产额。我们的模拟预测，使用所提出的方案，100TW 激光系统可以将质子加速到超过 150 MeV 的能量。
