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质子放射用于放射肿瘤治疗有良好效果,需要用到质子加速器。介质壁加速器(DWA)是一种基于固态脉冲形成线、光导开关和绝缘介质壁等关键技术为一体的新概念直线加速器,可用于质子肿瘤治疗。为此,介绍了研发新型医疗加速器的必要和介质壁加速器用于肿瘤治疗的优势:质子用于肿瘤治疗时,有明确的射程,可以使辐射剂量主要沉淀在肿瘤区域,提高治疗效果,降低对非肿瘤区正常组织的伤害;介质壁加速器加速梯度最高可达100 MV/m,可以有效实现加速器的小型化、紧凑化,降低建造以及运行维护成本。此外,重点介绍了中国工程物理研究院流体物理研究所在介质壁加速器关键技术研究所取得的进展,包括固态脉冲形成线技术,高梯度绝缘介质壁技术,光导开关及其触发技术,以及一种300 k V的脉冲功率源等。
Proton radiation has a good effect in the treatment of radiation tumors and requires the use of proton accelerators. The Dielectric Wall Accelerator (DWA) is a new concept linear accelerator based on solid-state pulse forming lines, photoconductive switches, and dielectric walls, which can be used for proton tumor therapy. For this reason, the advantages of developing a new type of medical accelerator and the advantages of using medium-wall accelerators for tumor treatment are introduced: When protons are used for tumor treatment, they have a clear range, which can make the radiation dose mainly precipitate in the tumor area, improve the therapeutic effect, and reduce the Non-tumor area normal tissue damage; medium-wall accelerator acceleration gradient up to 100 MV/m, which can effectively achieve compact, compact, reduce construction and operation and maintenance costs. In addition, the progress made by the Institute of Fluid Physics, Institute of Fluid Physics, China Academy of Engineering Physics, on the key technologies of medium-wall accelerators was highlighted, including solid-state pulse formation line technology, high-gradient dielectric wall technology, photoconductive switches and their triggering technologies, and 300 kV pulse power source.