5.5-7.5通过中等强度超短laser与H2O纳米线靶的相互作用产生的MeV质子
5.5-7.5 MeV Proton generation by a moderate intensity ultra-short laser interaction with H2O nano-wire targets
摘要：
我们报道了中等强度短脉冲激光（4.5 \times 1017 W/cm ^2，50 fsec）与沉积在蓝宝石衬底上的水纳米线（雪）相互作用产生的第一代5.5-7.5 MeV质子。在这种设置中，激光强度通过雪纳米线的尖端局部增强，从而导致高空间梯度。因此，尖端附近的等离子体受到增强的有质动力势，并获得受限的电荷分离。极高强度的静电场在短尺度长度上产生，质子被加速到MeV级能量。
英文摘要：
We report on the first generation of 5.5-7.5 MeV protons by a moderate intensity short-pulse laser (4.5 \times 1017 W/cm^2, 50 fsec) interacting with H2O nano-wires (snow) deposited on a Sapphire substrate. In this setup, the laser intensity is locally enhanced by the tip of the snow nano-wire, leading to high spatial gradients. Accordingly, the plasma near the tip is subject to enhanced ponderomotive potential, and confined charge separation is obtained. Electrostatic fields of extremely high intensities are produced over the short scale length, and protons are accelerated to MeV-level energies.
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