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    • 6. 发明公开
    • BEAM TRANSPORT SYSTEM AND PARTICLE THERAPY DEVICE
    • STRAHLENTRANSPORTSYSTEM UND PARTIKELTHERAPIEVORRICHTUNG
    • EP3020451A4
    • 2017-02-22
    • EP13888974
    • 2013-07-11
    • MITSUBISHI ELECTRIC CORP
    • HANAKAWA KAZUSHISUGAHARA KENGOODAWARA SHUHEI
    • A61N5/10H05H7/00H05H7/04
    • A61N5/1064A61N5/1077A61N2005/1087H05H7/001H05H7/04H05H2007/002H05H2007/048
    • The object is to provide a beam transport system that can nearly nullify a chromatic aberration of a beam at an irradiation position of the beam even when it is a beam emitted from a small-sized synchrotron. According to a beam transport system (4) of the invention, it is characterized in that: based on a beam temporal-variation related amount that has been calculated by a beam analyzer (14) and that is a beam-position temporal variation amount or a beam diameter at a beam profile monitor (11), an optical parameter calculator (17) calculates a start- point momentum dispersion function that is a momentum dispersion function (·, ·') of a charged particle beam (31) at a start point (S) in design of the beam transport system (4) that is set on a beam trajectory of the accelerator (3); and calculates optical parameters using, as an initial condition, the start-point momentum dispersion function and a beginning condition at an irradiation position (T) at the time of detecting profile data.
    • 本发明的目的是提供一种光束传输系统,即使在从小尺寸的同步加速器发射的光束时,它也能近似地消除光束在光束的照射位置处的色像差。 根据本发明的光束传输系统(4),其特征在于:基于由光束分析器(14)计算的光束时间变化相关量,并且其是光束位置时间变化量或 在光束轮廓监视器(11)处的光束直径,光学参数计算器(17)计算起始点动量色散函数,其是开始时的带电粒子束(31)的动量色散函数(·,·) 设置在加速器(3)的光束轨迹上的光束传输系统(4)的设计点(S); 并且在检测轮廓数据时使用起始点动量色散函数和在照射位置(T)的开始条件作为初始条件来计算光学参数。