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HIAF-SRing的等时性模式光学设计

吴波 杨建成 葛文文 夏佳文 申国栋 颜鑫亮

吴波, 杨建成, 葛文文, 夏佳文, 申国栋, 颜鑫亮. HIAF-SRing的等时性模式光学设计[J]. 原子核物理评论, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
引用本文: 吴波, 杨建成, 葛文文, 夏佳文, 申国栋, 颜鑫亮. HIAF-SRing的等时性模式光学设计[J]. 原子核物理评论, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
WU Bo, YANG Jiancheng, GE Wenwen, XIA Jiawen, SHEN Guodong, YAN Xinliang. Ion Optics Design of the Isochronous Modes for the HIAF/Sring[J]. Nuclear Physics Review, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
Citation: WU Bo, YANG Jiancheng, GE Wenwen, XIA Jiawen, SHEN Guodong, YAN Xinliang. Ion Optics Design of the Isochronous Modes for the HIAF/Sring[J]. Nuclear Physics Review, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270

HIAF-SRing的等时性模式光学设计

doi: 10.11804/NuclPhysRev.35.03.270
基金项目: 国家自然科学基金青年科学基金项目(11705253,11605248)
详细信息
    作者简介:

    吴波(1990-),男,江苏徐州人,博士研究生,从事重离子加速器物理;E-mail:wubo@impcas.ac.cn

    通讯作者: 杨建成,E-mail:yangjch@impcas.ac.cn。
  • 中图分类号: O571.53

Ion Optics Design of the Isochronous Modes for the HIAF/Sring

Funds: Youth Funds of National Natural Science Foundation of China (11705253, 11605248)
  • 摘要: 高精度环形谱仪SRing作为HIAF装置的核心之一,是获取高品质放射性次级束,并将束流用于加速器技术研究、原子物理及核物理实验的关键设备。SRing有三种运行模式:等时性模式、正常模式与内靶模式。等时性模式下,SRing运行在特殊线性光学设置下,可以精确测量寿命低至几十微秒的原子核的质量。介绍SRing等时性模式的线性光学及高阶项校正的设计方案。在使用程序GICOSY进行等时性高阶项校正数值计算后,将得到的光学传输矩阵输入到程序MOCADI进行粒子跟踪模拟。以γt=1.43的等时性模式为例,SRing的动量接收度为±0.20%,粒子跟踪结果显示,在仅满足一阶等时性条件时SRing的质量分辨能力R=1.6×104。在保证动量接收度不变的前提下,考虑了等时性高阶项校正后SRing的质量分辨能力提高到R=1.2×106,达到设计要求。


    The Spectrometer Ring, as the most important experiment terminal of the High Intensity heavy-ion Accelerator Facility (HIAF) project, is a key device to obtain high-quality radioactive ion beams (RIBs) for atomic physics, nuclear physics experiments and accelerator technology researches. Three operation modes including the isochronous mode, the normal mode and the internal target mode, have been designed for the SRing. In the isochronous mode, the SRing operates under a special ion optics and could be used for precision mass measurement of short-lived nuclei with half-life shorter than several tens of microseconds. This study aims to design the ion optics for the isochronous mode and improve the mass resolving power of the SRing with higher-order ion-optical correction scheme for isochronism while preserve a large momentum acceptance of SRing. The ion optics and the higher-order correction for the isochronous mode are calculated with the code MAD-X and GICOSY respectively. Three ion optics with γt=1.43, 1.67, 1.83 settings have been calculated. The code MCOADI which utilizes the matrixes generated by the code GICOSY is used for particles tracking to verify the correction results. For the ion-optical setting of γt=1.43 with a momentum acceptance of ±0.20%, the mass resolving power of the SRing could be improved from R=1.6×104 to R=1.2×106, after isochronous higher-order corrections.
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    [2] MA X, WEN W Q, ZHANG S F, et al. Nucl Instr Meth B, 2017, 408:169.
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    [4] LITVINOV Y A, GEISSEL H, RADON T, et al. Nucl Phys A, 2005, 756(1-2):3.
    [5] FRANZKE B, BECKERT K, EICKHOFF H, et al. Phys Scri, 1995, T59(1995):176.
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    [14] GEISSEL H, LITVINOV YU A. J Phys G, 2005, 31, S1779.
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    [21] ABE Y, YAMAGUCHI Y, WAKASUGI M, et al. Phys Scripta, 2015, T166:014047.
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出版历程
  • 收稿日期:  2018-03-20
  • 修回日期:  2018-04-25
  • 刊出日期:  2018-09-20

HIAF-SRing的等时性模式光学设计

doi: 10.11804/NuclPhysRev.35.03.270
    基金项目:  国家自然科学基金青年科学基金项目(11705253,11605248)
    作者简介:

    吴波(1990-),男,江苏徐州人,博士研究生,从事重离子加速器物理;E-mail:wubo@impcas.ac.cn

    通讯作者: 杨建成,E-mail:yangjch@impcas.ac.cn。
  • 中图分类号: O571.53

摘要: 高精度环形谱仪SRing作为HIAF装置的核心之一,是获取高品质放射性次级束,并将束流用于加速器技术研究、原子物理及核物理实验的关键设备。SRing有三种运行模式:等时性模式、正常模式与内靶模式。等时性模式下,SRing运行在特殊线性光学设置下,可以精确测量寿命低至几十微秒的原子核的质量。介绍SRing等时性模式的线性光学及高阶项校正的设计方案。在使用程序GICOSY进行等时性高阶项校正数值计算后,将得到的光学传输矩阵输入到程序MOCADI进行粒子跟踪模拟。以γt=1.43的等时性模式为例,SRing的动量接收度为±0.20%,粒子跟踪结果显示,在仅满足一阶等时性条件时SRing的质量分辨能力R=1.6×104。在保证动量接收度不变的前提下,考虑了等时性高阶项校正后SRing的质量分辨能力提高到R=1.2×106,达到设计要求。


The Spectrometer Ring, as the most important experiment terminal of the High Intensity heavy-ion Accelerator Facility (HIAF) project, is a key device to obtain high-quality radioactive ion beams (RIBs) for atomic physics, nuclear physics experiments and accelerator technology researches. Three operation modes including the isochronous mode, the normal mode and the internal target mode, have been designed for the SRing. In the isochronous mode, the SRing operates under a special ion optics and could be used for precision mass measurement of short-lived nuclei with half-life shorter than several tens of microseconds. This study aims to design the ion optics for the isochronous mode and improve the mass resolving power of the SRing with higher-order ion-optical correction scheme for isochronism while preserve a large momentum acceptance of SRing. The ion optics and the higher-order correction for the isochronous mode are calculated with the code MAD-X and GICOSY respectively. Three ion optics with γt=1.43, 1.67, 1.83 settings have been calculated. The code MCOADI which utilizes the matrixes generated by the code GICOSY is used for particles tracking to verify the correction results. For the ion-optical setting of γt=1.43 with a momentum acceptance of ±0.20%, the mass resolving power of the SRing could be improved from R=1.6×104 to R=1.2×106, after isochronous higher-order corrections.

English Abstract

吴波, 杨建成, 葛文文, 夏佳文, 申国栋, 颜鑫亮. HIAF-SRing的等时性模式光学设计[J]. 原子核物理评论, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
引用本文: 吴波, 杨建成, 葛文文, 夏佳文, 申国栋, 颜鑫亮. HIAF-SRing的等时性模式光学设计[J]. 原子核物理评论, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
WU Bo, YANG Jiancheng, GE Wenwen, XIA Jiawen, SHEN Guodong, YAN Xinliang. Ion Optics Design of the Isochronous Modes for the HIAF/Sring[J]. Nuclear Physics Review, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
Citation: WU Bo, YANG Jiancheng, GE Wenwen, XIA Jiawen, SHEN Guodong, YAN Xinliang. Ion Optics Design of the Isochronous Modes for the HIAF/Sring[J]. Nuclear Physics Review, 2018, 35(3): 270-277. doi: 10.11804/NuclPhysRev.35.03.270
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