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Design of the Fast Scanning Magnets for SC200 Proton Therapy Facility

机译：SC200质子治疗仪快速扫描磁体的设计

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At the Institute of Plasma Physics of the Chinese Academy of Sciences, a design of the pencil beam scanning nozzle is being planned. The main goal of the design is to meet the requirements of the radiation field and the scanning speed of the superconducting accelerators SC200 and to achieve a compact structure. Scanning magnets are one of the core components in the pencil beam scanning system and used to control the trajectory of the proton beam to form a radiation field to be tumor shape. This paper mainly discusses the physical considerations and requirements of the scanning system and scanning electromagnetic design. The tapered air gap of scanning magnet Y was used to accommodate the deflection envelope of the scanning magnet X. Since the two scanning magnets are excited by alternating currents and the maximum repetition frequency are up to 50 Hz and 12.5 Hz, respectively, eddy currents and losses are expected to be significant. To study the eddy current effect, the eddy current and steady-state thermal simulation of the magnet end plate were carried out, and the results of the simulation were discussed.
机译：在中国科学院等离子体物理研究所，正在设计铅笔束扫描喷嘴的设计。设计的主要目的是满足辐射场和超导加速器SC200的扫描速度的要求，并实现紧凑的结构。扫描磁体是笔形束扫描系统中的核心组件之一，用于控制质子束的轨迹以形成呈肿瘤形状的辐射场。本文主要讨论了扫描系统和扫描电磁设计的物理考虑和要求。扫描磁体Y的锥形气隙用于容纳扫描磁体X的偏转包络。由于两个扫描磁体被交流电激励，并且最大重复频率分别高达50 Hz和12.5 Hz，因此涡流和涡流均达到最大。预计损失会很大。为了研究涡流效应，对磁体端板进行了涡流和稳态热仿真，并讨论了仿真结果。

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