单粒子束装置的束品质优化研究
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摘要
离子束生物工程学是余增亮先生开创的新兴交叉学科。它已在离子束介导转基因、诱变育种、环境辐射与人类健康等领域取得重大成果。由于单粒子束可以对细胞进行定点定量辐射,所以它对促进离子束生物工程学的研究与应用都有重大意义。而对细胞的定点定量辐射都要以良好的束线品质为前提,因此对单粒子束装置及其束线品质的研究具有重要意义。
     本文重点讨论了中科院离子束生物工程学重点实验室单粒子束装置的束流传输部分,对主要部件进行了详细的讨论,如:静电加速器、偏转磁铁、磁四极透镜、束线开关、瞄准器等,实验中已取得束流穿过10μm小孔的标志性成果,并运用相关理论结合具体实验分析了实验结果。同时提出了利用发射度测量装置来监测束流品质进而改变磁四极透镜相关参数以实现实时地对束线品质优化的设想。
Ion beam bioengineering which is created by professor Z.L. Yu is a new cross subject. It has accomplished many important achievements in gene transformation mediated by ion beam, mutagenic breeding, enviromental radiation and human health and so on. For the single-ion microbeam can irradiate cell in precise spatial and a predefined number of particle, so it can boost the research and appliance of low energy ion beam bioengineering. However, it is good beam quality that is preliminary for the irradiation in precise spatial and a predefined number of particle, hence it is important to study on the single-ion microbeam facility and it's beam quality.
    The paper mainly focused on the beam transport part of ASIPP key laboratory of ion beam bioengineering and it's component elements, for example, van de Graff accelerator, bending magnet, magnetic quadruple lenses, beam shutter, collimator and so on. The laboratory has performed the milestone achievement that is beam passed the hole of lO^m diameter in experiments. Many experimental results are discussed by theories according to experiments. Moreover the paper makes forth of the hypothesis of optimizing the beam quality.Through measuring the emittance, the facility can change the parameters of magnetic quadruple lenses to optimize the beam quality in real-time.
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