30MeV医用回旋加速器束流输运线上旋转扫描磁铁的研制

Wobbling Magnet Design for Beam Line of CYCIAE-30 Medical Cyclotron

加速器引出束流分布一般都是高斯分布,而在束流应用中需要更多的是均匀分布的束流．目前国内研究已经实现了束流的均匀分布,但事实上这些束流的均匀度不够理想．因此,重点介绍了能够使束流实现高均匀分布的旋转扫描磁铁的研制过程,在理论推敲和实践检测的基础上充分证实:通过旋转扫描磁铁的作用,束流可以在目标靶上完全实现高均匀分布．这项技术在国内实属首创,其性能已经达到国际同类磁铁的先进水平．

The beam extracted from cyclotron is of Gaussian distribution, but in many applications the uniformly distributed beam is needed. There axe some methods to achieve uniform beam, but the uniformity is less than expected. This paper introduces the process of the wobbling magnet design which can get the high uniform beam. On the base of the design theory and the measurement to the wobbling magnet, we can confirm that there has high uniform beam on the target under the wobbling magnet effect. It is the first time to design and manufacture the wobbling magnet by ourselves in our country, and the measurement results show that the magnetic field in the wobbling magnet axe satisfied the requirement of the storage wobbling magnet.