Study of FFAG as a Versatile Accelerator for Applications

本研究成功地完成了150 MeV质子股份公司加速器的研制。150 MeV质子股份公司加速器由12个磁铁组成，每个磁铁都有一个新颖的“无返回约克”结构。我们成功地用100赫兹的高重复频率将质子加速到普通同步加速器不可能达到的最大可用能量，并以90%以上的高效率提取了它们。我们用高重复率的光束进行了快速光斑扫描或未来癌症治疗的基础实验，通过测量深度依赖的剂量，得到了布拉格峰值曲线。利用光纤闪烁体和固体线传感器件研制成功了一种新型的二维探测器或光斑扫描装置。为了在未来实现FFAG环的小尺寸，我们开发了一种新型超导磁体样机，该磁体由不对称线圈结构和最新开发的计算机化6D线圈绕线机(CNC)组成。对该样机进行了精确的磁场测量，并发现其磁场质量良好。我们可以总结说，这个项目已经成功开展，几乎所有开始针对的问题都已经完成，并取得了丰硕的成果。

Development o 150MeV proton AG accelerator has been successfully completed in this study. The 150MeV proton AG accelerator consists of twelve magnets, each o which has a novel "return-york-free" configuration. We have successfully accelerated protons up to the maximum available energy in this ring with high repetition rate of 100Hz, which, is impossible or ordinary synchrotron and extracted them with high efficiency of more than 90%. We have made a basic experiment of fast spot scanning or future cancer therapy with high repetition beam and obtained a Bragg peak curve by measuring the depth-dependent dose. A new type of 2D detector or spot scanning with fiber scintillator and solid-state line sensing devices has been also successfully developed. In order to realize a small size FFAG ring in future, we have developed a prototype of novel super conducting magnet that composes of asymmetric coil configuration with newly developed computerized 6D coil winding machine (CNC). The magnetic field measurement has been carried out precisely or this prototype and the field quality was found to be excellent. We can summarize that this project has been successfully carried out and almost all issues that were aimed at the beginning have been completed with fruitful results.