Compact hadron driver for cancer therapies using continuous energy sweep scanning
Compact hadron driver for cancer therapies using continuous energy sweep scanning
复制标题
使用连续能量扫描进行癌症治疗的紧凑型强子驱动器
DOI：
10.1103/physrevaccelbeams.19.042802
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Takayama
中科院分区：
文献类型：
--
作者：
L. Wah;Takumi Monma;T. Adachi;T. Kawakubo;T. Dixit;K. Takayama
为了在快周期同步加速器中实现慢提取技术，从而实现能量扫描，需要一个零动量色散D(S)区和一个高平坦D(S)区。建议的设计满足这两个要求。晶格具有两重对称性，周长为52.8m，为2m的无色散直线段，为3m长的大平坦色散直线段。假设有一个1.5T的弯曲磁铁，该环可以以10赫兹的频率发射重离子(200 MeV/Au)。在所需的时间从势垒桶中落下一束分数，并且该束分数不断增加的负动量偏差变得足够大，使得该分数落入位于大D(S)区的静电隔膜提取间隙中。程序化的能量扫描提取使扫描束能够在没有能量降解器的情况下对癌症部位进行深度照射，避免产生二次粒子和发射度下降。讨论了晶格参数的细节和慢抽提的计算机模拟。
To realize a slow extraction technique in a fast-cycling synchrotron, which allows energy sweep beam scanning, a zero momentum-dispersion D(s) region and a high flat D(s) region are necessary. The proposed design meets both requirements. The lattice has two-fold symmetry with a circumference of 52.8 m, a 2-m dispersion-free straight section, and a 3-m-long large flat dispersion straight section. Assuming a 1.5-T bending magnet, the ring can deliver heavy ions (200 MeV/au) at 10 Hz. A beam fraction is dropped from the barrier bucket at the desired timing, and the increasing negative momentum deviation of this beam fraction becomes large enough for the fraction to fall in the electrostatic septum extraction gap, which is placed at the large D(s) region. The programmed energy sweep extraction enables scanning beam irradiation on a cancer site in depth without an energy degrader, avoiding the production of secondary particles and the degradation of emittance. Details of the lattice parameters and computer simulations for slow extraction are discussed.