Development of Advanced Techniques for the Generation of High Luminosity X-ray Pulse by the Inverse Compton Scattering

利用激光光阴极射频枪系统产生了高质量的电子束，电子束的发射度值非常低，足以用于逆康普顿散射实验。另一方面，对与电子束碰撞的激光系统进行了研究，实现了激光束输出强度和对本振定时的稳定。采用功率谱密度法（PSD）对输出稳定性进行评价，其值小于0.03%。用同样的方法对时序抖动进行了评估，其值小于0.26ps。利用一种新的无损技术——频率分析，测量了电子束的脉冲长度。结果表明，该方法适用于皮秒级电子脉冲的测量。仿真结果表明，射频枪与Nd: YLF激光相结合，可产生能量达数百eV的软x射线，称为水窗。我们进行了4.2 MeV电子束与Nd: YLF激光器之间的散射实验，得到了时间持续时间为7的清晰x射线信号。7ps，能量为300ev。

High quality electron beam generation by using a laser photo-cathode RF gun system has been performed The emittance value for the electron beam was very low enough for the Inverse Compton Scattering experiments. On the other hand, laser system for the collision with the electron beam was investigated We have achieved the stabilization of laser beam output intensity and timing to the local oscillator. The output stability was evaluated by the PSD (Power Spectrum Density) method and the value was less than 0.03%. The timing jitter was also evaluated by the same method and the value was less than 0.26ps. The pulse length of the electron beam has been measured by the new nondestructive technique named frequency analysis. The results show that the method is applicable for the measurement of electron pulse with pico-second renge. The simulation of the Inverse Compton Scattering has been performed and the optimization of the system has been realized As the results of the simulation, soft X-ray can be generated with the energy of several hundreds of eV, that is called as water windows, by the combination of the RF gun and the Nd : YLF laser. We have carried out the scattering experiment between 4.2 MeV electron beam and Nd : YLF laser, and obtained the clear X-ray signal from the X-ray, which has the time duration or 7. 7 ps with the energy of 300 eV.