We have experimentally demonstrated that fast electrons emitted from a metallic wire irradiated by a 5×10[18] W/cm[2] laser pulse can be collimated along the wire, and that their intensity is significantly enhanced in the axial direction of the wire. As the wire length is increased up to 30 mm from the laser focal spot, the angular divergence of the emitted electrons with energies of hundreds of keV decreases to 65 mrad. Numerical simulations reveal that the electrons are trapped by the transient electric field surrounding the wire and guided along the axial direction.
展开▼
机译：我们已经通过实验证明，由5×10 [18] W / cm [2]激光脉冲辐照的金属丝发射的快速电子可以沿金属丝准直，并且它们的强度在金属丝的轴向上得到了显着增强。 。当导线长度增加到距激光焦点的30 mm时，能量为数百keV的发射电子的角发散减小到65 mrad。数值模拟表明，电子被导线周围的瞬态电场捕获并沿轴向被引导。
展开▼
