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用于PET的医用小型回旋加速器在国际上已经得到了良好的发展,这些加速器大多数采用内部离子源,可提供50～100μA的质子束流,能量大约在9～18MeV范围内[1-3],一个例外是加拿大的TR-14/19[4],采用外部离子源,可提供大约150μA的质子束流。为了提供更高流强的质子束,以适合于即时药物配送中心使用、并可利用固体靶生产更多品种的放射性核素,CYCIAE-14采用基于外部负氢离子源、轴向注入线和螺旋偏转板的注入系统,设计流强高于400μA[5]。这种情况下,
The medical small cyclotron for PET has been well developed in the world. Most of these accelerators use an internal ion source, which can provide 50-100 μA proton beams and the energy is about 9-18 MeV [1-3] , With the exception of Canada's TR-14/19 [4], which uses an external ion source to provide a proton beam of about 150 μA. CYCIAE-14 is based on an external negative hydrogen ion source, axial injection line and helical deflector plate to provide a higher flow of proton beam suitable for use in real-time drug delivery centers and the use of solid targets to produce a greater variety of radionuclides Injection system, the design flow is higher than 400μA [5]. In this situation,