飞秒激光与双层靶相互作用靶背质子加速实验研究

Experimental Research of Protons Generated Femtosecond Laser and Double Target Interaction at the Rear Side of Target

研究了飞秒激光与10μm的Cu和5μm的C8H8构成的双层薄膜靶相互作用中在靶背法线方向质子的能量分布.采用CR39固体核径迹探测器和Thomson磁谱仪相结合测量质子能谱.实验结果表明:质子沿着靶背法线方向发射;随着质子能量的增加,质子数减少;质子在一定能量处出现截断,截止能是1179 keV.

The energy distributions of the protons were studied at the target back normal direction generated by interaction of the femtosecond laser with 10 μm Cu and 5μm C8H8 double target.The CR39 solid state nuclear track detector combined with the thomson spectrum are used to measure the energy spectrum of the protons ment in the experiment.The results showed that the protons are emitted along the target rear-side normal direction and the proton beam was decreased with the increasing of proton energy.In addition,the protons disappeared at a certain energy 1179 keV.