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1.
The accelerators should be properly designed to make the radiation field produced by beam loss satisfy the dose limits. The radiation field for high intensity H- cyclotron includes prompt radiation and residual radiation field. The induced radioactivity in accelerator components is the dominant source of occupational radiation exposure if the accelerator is well shielded. The source of radiation is the beam loss when cyclotron is operating. In this paper, the radiation field for CYCIAE-100 is calculated using Monte Carlo method and the radioactive contamination near stripping foil is studied. A method to reduce the dose equivalent rate of maintenance staff is also given.  相似文献   
2.
The accelerators should be properly designed to make the radiation field produced by beam loss satisfy the dose limits. The radiation field for high intensity H cyclotron includes prompt radiation and residual radiation field. The induced radioactivity in accelerator components is the dominant source of occupational radiation exposure if the accelerator is well shielded. The source of radiation is the beam loss when cyclotron is operating. In this paper, the radiation field for CYCIAE-100 is calculated using Monte Carlo method and the radioactive contamination near stripping foil is studied. A method to reduce the dose equivalent rate of maintenance staff is also given.  相似文献   
3.
Vertical focusing study in the central region of the CYCIAE-100 cyclotron   总被引:1,自引:0,他引:1  
The vertical focusing is one of the primary problems in the central region of cyclotrons. This focusing effect brought about by the magnetic field is inclined to be weak near the center of the machine due to the fact that the flutter is small, while the electric focusing forces incurred from the dee gaps become very strong. Since the electric focusing effect is dependent on the RF phase, we have proceeded to carry out analytical calculations and numerical simulation about the vertical focusing in the central region of CYCIAE-100, including magnetic focusing, electric focusing and the defocusing effect from the space charge effect. All the results have been used for the design of the central region for CYCIAE-100 and a good vertical focusing has been obtained.  相似文献   
4.
A 100 MeV H- compact cyclotron is under construction at China Institute of Atomic Energy (CYCIAE-100). The proton beams of 75 MeV-100 MeV at an intensity of 200 μA will be extracted in dual opposite directions by charge exchange stripping devices. The crossing point at the switching magnet center is fixed inside the magnet yoke and the stripping points for various extraction energies are calculated by the code CYCTRS. With the code GOBLIN, we can calculate the transfer matrix including the dispersion effects from the stripping point to the switch magnet. The beam distribution just after stripping foil can be obtained from the multi-particle tracking code COMA and the extracted beam parameters after the switch magnet such as emittance, envelope, dispersion, energy spread, bunch length, etc. are given by the extraction orbit simulations.  相似文献   
5.
A 75—100 MeV H- compact cyclotron CYCIAE-100 is being constructed at China Institute of Atomic Energy (CIAE). About 200 μA proton beam will be provided by CYCIAE-100. The imperfection of magnetic fields will remarkably affect the acceleration orbit and beam envelope in CYCIAE-100. The effects to the accelerating beam by the imperfection fields, especially the field components Br on the mid-plane will be analyzed in detail with tracking code COMA. Poles misalignment that causes magnetic imperfection will be described in the paper. According to the simulation results, the tolerance of the poles machining and assembly will be illustrated in this paper.  相似文献   
6.
离子源是强流质子回旋加速器的核心设备之一, 它的性能指标对最终束流大小和质量都有重大影响. 文章介绍了一种运用于强流质子回旋加速器上的多峰场负氢离子源的设计与加工情况, 该离子源主要是通过深入研究高密度等离子体产生技术、长寿命大直流灯丝电子发射技术、磁约束技术、虚拟过虑技术、残留气体与电子剥离的控制技术, 以及离子引出技术等, 在中国原子能科学研究院原有10mA离子源基础上建立负氢离子源, 实验研究低能、强流束的实验匹配与调试技术, 将平均引出束流提高到15—20mA.  相似文献   
7.
A 75—100 MeV H- compact cyclotron CYCIAE-100 is being constructed at China Institute of Atomic Energy (CIAE). About 200 μA proton beam will be provided by CYCIAE-100. The imperfection of magnetic fields will remarkably affect the acceleration orbit and beam envelope in CYCIAE-100. The effects to the accelerating beam by the imperfection fields, especially the field components Br on the mid-plane will be analyzed in detail with tracking code COMA. Poles misalignment that causes magnetic imperfection will be described in the paper. According to the simulation results, the tolerance of the poles machining and assembly will be illustrated in this paper.  相似文献   
8.
中国原子能科学研究院目前正在建造一台100MeV强流回旋加速器, 它加速负氢离子, 通过剥离引出质子束, 能量75MeV—100MeV, 流强200μA. 该回旋加速器的主磁铁为紧凑型整体结构, 采用4扇直边叶片, 渐变气隙. 将报告该磁铁的设计特点, 数值模拟结果; 磁性材料及成分偏析、缩孔等内部缺陷;机械结构设计、公差、变形;还将描述磁铁的工作进展.  相似文献   
9.
强流回旋加速器综合试验装置的主体是一台紧凑型回旋加速器,加速器主磁铁材料的不均匀性,磁铁加工和安装的非理想因素将引起中心平面的磁场的非理想分布,因此有必要对其中心平面的磁场进行测量和垫补.本文主要讲述该综合试验装置的霍尔感应磁场测量系统的设计和使用;通过磁场测量数据分析进行镶条的再加工,最终实现对等时性磁场和束流的纵向聚焦的垫补;研究与实践了一种对磁场一次谐波进行垫补的方法,垫补的结果满足了设计的要求.  相似文献   
10.
强流回旋加速器综合试验装置的磁场测量与垫补   总被引:2,自引:0,他引:2  
强流回旋加速器综合试验装置的主体是一台紧凑型回旋加速器, 加速器主磁铁材料的不均匀性, 磁铁加工和安装的非理想因素将引起中心平面的磁场的非理想分布, 因此有必要对其中心平面的磁场进行测量和垫补. 本文主要讲述该综合试验装置的霍尔感应磁场测量系统的设计和使用;通过磁场测量数据分析进行镶条的再加工, 最终实现对等时性磁场和束流的纵向聚焦的垫补;研究与实践了一种对磁场一次谐波进行垫补的方法, 垫补的结果满足了设计的要求.  相似文献   
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