重离子治癌引出BUMP电源控制器设计

引出凸轨(BUMP)电源是负责医用重离子加速器束流引出的关键设备，其电流上升的同步性影响束流的引出效率，而电流波形的多样性与治疗模式和治疗精度密切相关。要在凸轨磁铁(0.2~0.4 mH)上产生1~5 ms上升且精确同步的励磁电流，并确保电流的跟踪性和波形的多样性，采用了实时调整强励电压及基于特征参数的电流波形控制方法。本文介绍了基于Inter公司SoC(System-on-a-Chip)技术的引出BUMP电源数字控制器软硬件设计，并首次应用到医用重离子加速器装置，经过现场验证，在不同的凸轨磁铁上产生了1~5 ms同步变化的电流，同时保证了电流上升时期的跟踪精度(>5 s)，达到了设计要求。

Design of Controller for Extraction BUMP Power Supplies in Medical Heavy-ion Facility

The BUMP power supply is the key equipment responsible for the beam extraction of the medical heavy ion accelerator. The synchronization of the current rise affects the extraction efficiency of the beam, and the diversity of the current waveform is closely related to the treatment mode and treatment accuracy. It is necessary to generate 1~5 ms rising and accurately synchronized excitation current on the convex rail magnet (0.2~0.4 mH), and ensure the current tracking and the diversity of the waveform. Real-time adjustment of the strong excitation voltage and current waveform based on characteristic parameters are adopted. Control Method. This article introduces the software and hardware design of the digital controller for the BUMP power supply based on Inter's SoC(System-on-a-Chip) technology, and it is applied to the medical heavy ion accelerator device for the first time. After field verification, it is produced on different convex rail magnets. The synchronously changing current of 1~5 ms is achieved, and the tracking accuracy (>5 s) of the current rising period is guaranteed, which meets the design requirements.