Development of application of compact tunable monochromatic X-ray source

使用X波段直线加速器和Nd：YAG激光器的紧凑、高强度和高稳定的康普顿散射X射线源是由东京大学核专业学院开发的。本文主要对3.5单元X波段热离子阴极射频枪的实验验证进行了研究。在第三章中，我们计算和评价了康普顿散射产生的X射线的性质。计算了X射线的角分布、能谱和强度。最大X射线能量为43.8keV，总强度约为1.0×109光子/S，电子束能量为30 MeV，激光强度为1.4J，波长为532 nm。X射线产额的稳定性评价小于10%。对梁的优化及其稳定性进行了讨论。此外，还进行了X波段直线加速器束线和波导系统的搭建及其高功率实验。此外，用于…的激光系统构建了更多的康普顿散射实验，并对其性能进行了评价。1.在3.5室X波段热离子阴极射频枪上进行了高功率实验，测量了2 MeV电子束。首次实现了X波段热离子阴极射频枪产生高能(-2 MeV)多束团电子束的实验验证。2.完成了包括X波段热离子阴极射频枪和X波段加速结构在内的整个射频系统的搭建。对加速结构实现了40 mW的射频馈电，对高频枪实现了5.5 mW的射频馈电。此外，还总结了高功率射频调理的经验，推导出高功率射频调理的指导思想。这些知识将对今后实现X波段紧凑型高能加速器起到重要作用。3.构建了康普顿散射实验的激光脉冲循环系统，并对其性能进行了评价。建立了激光在150微米(水平)和300微米(垂直)RMS处的聚焦。然后，确定了其在微米级内的定位稳定性。此外，还建立了康普顿散射的实验装置。该设置包括光束诊断部分。我们开发了一些束流诊断方案，可以测量碰撞点处的四维束参数。较少

The compact, high-intensity-, and highly-stable- Compton scattering X-ray source using the X-band linac and Nd:YAG laser has been developed at the Nuclear Professional School, the University of Tokyo. In this dissertation, the experimental verification of the 3.5-cell X-band thermionic cathode RF gun was mainly studied. In the chapter 3, we calculated and evaluated the properties of the X-rays generated via Compton scattering. The angular distribution, spectrum, and intensity of the X-rays were calculated. The maximum X-ray energy is 43.8 keV and its total intensity is about 1.0 x 109 photons/s with the electron beam energy of 30 MeV and laser intensity and its wavelength of 1.4 J and 532 nm. The stability of the X-ray yields was evaluated to be less than 10 %. The beam optimization and its stability were discussed. In addition, the construction of the beam line and waveguide system for X-band linac and its high-power experiments were carried out. Furthermore, the laser system for the … More Compton scattering experiment was constructed and its performances were evaluated. Here, the important results and new knowledge throughout these studies are summarized as follows.1 The high-power experiments on the 3.5-cell X-band thermionic cathode RF gun were performed and the 2 MeV electron beam was measured. This experimental verification of high-energy (-2 MeV) multi-bunch electron beam generation from the X-band thermionic cathode RF gun is achieved first in the world.2 The construction of the whole RF system including the X-band thermionic cathode RF gun and X-band accelerating structure were carried out. RF feeding of 40 MW to the accelerating structure and 5.5 MW to the RF gun were achieved. In addition, We summarized the experiences and deduced the guideline of the high-powered RF conditioning. These knowledges will be important roles to realize X-band compact high-energy accelerators from now on.3 The laser pulse circulation system for the Compton scattering experiment was constructed and its properties were evaluated. Focusing of the laser at 150 (horizontal) and 300 (vertical) micro m at rms was established. Then, its positioning stability within micro m was also confirmed. Furthermore, the experimental setup for the Compton scattering are constructed. This setup includes the beam diagnostic section. We developed some beam diagnostic schemes that can measure the four-dimensional beam parameters at the collision point. Less