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质子治疗装置脉冲电源研制
Development of pulsed power supply in proton therapy
- 核技术 2016年39卷第4期 文章编号：040401
- 作者机构：
1.中国科学院上海应用物理研究所 张江园区 上海 201204;
2.中国科学院大学 北京 100049
- 作者简介：
缪亚运,女,1990年出生,2013年毕业于中南大学,现为硕士研究生,从事加速器凸轨磁铁脉冲电源研究
谷鸣,E-mail:guming@sinap.ac.cn
- 基金信息：上海市自主创新和高新技术产业发展重大项目 Supported by Independent Innovation and Development of High-tech Industry Project of Shanghai()
DOI：10.11889/j.0253-3219.2016.hjs.39.040401
中图分类号： TL503.5收稿日期：2016-02-01，
录用日期：2016-03-07，
纸质出版日期：2016-01-25
- 稿件说明：
移动端阅览
缪亚运, 谷鸣, 陈志豪, 等. 质子治疗装置脉冲电源研制[J]. 核技术, 2016,39(4):040401
Yayun MIAO, Ming GU, Zhihao CHEN, et al. Development of pulsed power supply in proton therapy[J]. Nuclear techniques, 2016, 39(4): 040401
缪亚运, 谷鸣, 陈志豪, 等. 质子治疗装置脉冲电源研制[J]. 核技术, 2016,39(4):040401 DOI： 10.11889/j.0253-3219.2016.hjs.39.040401.
Yayun MIAO, Ming GU, Zhihao CHEN, et al. Development of pulsed power supply in proton therapy[J]. Nuclear techniques, 2016, 39(4): 040401 DOI： 10.11889/j.0253-3219.2016.hjs.39.040401.
摘要
上海质子治疗装置项目中质子注入系统凸轨磁铁需要脉冲电源励磁
要求两台电源脉冲峰值幅度可调和波形一致
且运行可靠。本文介绍了凸轨磁铁脉冲电源的设计和测试。脉冲电源电路采用
LC
串联谐振作为脉冲成形发生电路
电路设计可调电感用于调整波形脉宽。晶闸管为电流开关
快恢复二极管串联晶闸管弥补大功率晶闸管的关断延迟和下冲
并增加饱和电抗器抑制励磁电流反向电流尖峰。测试结果表明
当励磁电流峰值为3732 A时
励磁电流触发抖动小于±25 ns
励磁电流峰值重复稳定度小于0.1%
反向电流尖峰下降为峰值电流的3.75%
快恢复二极管和饱和电感器对抑制励磁电流反冲的效果明显
满足了设计要求。
Abstract
Background:
2
Proton therapy centers have been operated worldwide recently. The central rationale for proton therapy is its superior spatial dose distribution in the patient. Injection system of synchronous storage ring in Sha
nghai proton therapy equipment requires two bump magnets.
Purpose:
2
Two new pulsed power supplies of the same parameters used in the bump magnet have been proposed and developed.
Methods:
2
The principle of pulse forming circuit is that
LC
series resonance generates when thyristor is turned on by trigger signals. Energy storage capacitor is charged to the setting voltage which determines the amplitude of the pulse waveform based on constant current by charging power supply. The main circuit employs variable inductance to adjust the pulse width. Fast recovery diode in series of thyristor could compensate for the turn-off delay of the thyristor while the peak of reverse current decreases due to saturable inductor.
Results:
2
Test results showed that when the half-sineexcitation current peak was set to 3732 A
its trigger jitter and reproducibility were less than ±25 ns and 0.1%
respectively. Reverse current could be reduced to 3.75% of the peak current.
Conclusion:
2
Experimental results indicate that the pulse power supply reaches the design requirements and saturable inductor restrains reverse current effectively.
关键词
Keywords
references
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