Extraction System Design for CYCIAE-100 Project

The 100 MeV H^- cyclotron is designed to produce 200 μA intense protons with the energy varying from 75 MeV to 100 MeV. The extraction system consists of two sets of stripping probes, and the beam will be extracted after stripping 2 electrons. Depending on the data of 100 MeV equilibrium orbits and magnetic field, we calculate the location of stripping points at various energies. The extraction optics is investigated by numerical tracking starting from the equilibrium orbits of various energies down to 70 MeV,     

Axial Injection System Design for CYCIAE-100 Project

A 100 MeV high intensity proton cyclotron is under design at CIAE to provide proton beams more than 200 μA, and will provide pulse beams. In order to get high average intensity and have the ability of providing pulse beams, the injection system has two schemes, which corresponds to 1# and 2# injection lines respectively, shown in Fig. 1. 1# line adopts bottom-up axial injection and it is designed to solve CW     

Mapper Design for CYCIAE-100 Project

There is a big range of magnetic field in the compact cyclotron, and the error caused by magnetic measurement in the main field will directly affect the shimming to magnetic field. Above all, in view of the fact that the tiny error deviating from the ideal field will exert a severe influence on the beam, it is critical to raise the precision of measurement to a high level.     

Preliminary Design of Central Control System for CYCIAE-100 Project

The central control system of the BRIF project is designed to provide a uniform control interface for the project facility＇s union operations. When the separate facility is in operation, its local control system will run independently. For union operation tasks, the local control systems of the facility involved will be connected by central control system; operations will be performed via the uniformed control interface. In the mean time, only operation commands from central Operating Interface will be valid.     

CYCIAE-100回旋加速器射频低电平系统嵌入式IOC设计

为对CYCIAE-100回旋加速器射频系统进行远程监测与控制,实现与CYCIAE-100回旋加速器主控制系统的联锁,研制了一种基于ARM9系列处理器的嵌入式IOC。该嵌入式IOC运行Linux操作系统,使用EPICS建立了IOC作为控制软件。通过软、硬件协同设计,扩展了ARM9系列处理器的SPI从设备数量,开发了ADC和DAC设备的Linux驱动程序和EPICS设备驱动程序。使用Python语言开发了EPICS串口设备支持程序。经过长期运行考验,该嵌入式IOC稳定可靠,满足远程监测和控制的需求。     

Design of Radiation Monitoring and Safety System for CYCIAE-100 Project

Instantaneous radiation, mainly consisting of photon and neutron caused by beam loss, occurs during the debugging and operation of the 100 MeV cyclotron. Some components such as beam line, targets and collimators will generate residual radiation while they are impinged by the beam. And worse still, sometimes this may lead to the destruction of relevant devices. In order to avoid the radiation damage to the device as well as people involved, it is planned to implement a set of radiation monitoring and safety system, aiming to protect devices and ensure personnel safety by monitoring the parameters of the beam and dose rate of different areas.     

Preliminary Beam Line Design for CYCIAE-100 Project

The Beijing Radioactive Ion-beam Facility （BRIF） is one of the main projects at China Institute of Atomic Energy （CIAE）, and will be a versatile platform for nuclear study in China. As a major part of this project, the 100 MeV cyclotron is designed to provide protons beam from 75 MeV to 100 MeV continuously. When the construction is accomplished, the beam dump system will be used to debug the machine. Then the adjusted beam is transported to the target through the ISOL proton line, isotope study proton line, single energy neutron source proton line, mix energy neutron source proton line, biomedicine study proton line, single particle effect study proton line, and etc.     

Magnet Design and Construction Preparation for CYCIAE-100

As the hill gap is required to increase by -1 cm due to the installation of RF, centering coils, beam diagnostics and etc., several adjusted geometries of the main magnet are investigated numerically and the new magnetic field distribution is provided for beam dynamics study in both acceleration and central region. Obviously, many key parameters of the magnet, e.g. the profile of hill gap, shimming bar, central plug, have to be re-designed while the excitation current is adjusted. In the year 2005, the basic geometry and its field distribution design were fixed, and many engineering aspects were in progress, including the mechanical structure design and construction preparation.     

Study on the First Harmonic Bump for CYCIAE-100 Project

In cyclotrons particles have fixed static equilibrium orbits （EO） for different energies, the center of the orbit is also the center of the machine. In fact beam will not run along EO, but with betatron oscillation about EO. When the magnetic field has imperfect component, the center of the orbit will deviate from its original position. A first harmonic of amplitude B1 displaces the center of the equilibrium orbit by a distance     

Debugging of South Stripping Target System for CYCIAE-100

正The CYCIAE-100 is a high intensity cyclotron.The beam intensity is 200μA.The energyrange is 75-100 MeV.The beam extraction system is made of the stripping target.The acceler-ated beam will be stripped off two electrons by membrane into protons.The proton beam will be led along the line.At the beginning of 2016,the     

CYCIAE-100 South Beam Line Control System

正The CYCIAE-100 is a high intensity cyclotron,the beam intensity is 200 μA and the energy is 75-100 MeV.The south line is composed of three lines:single event effect experimental line,neutron experimental line and proton radiography experimental line.Beams travel south stripping device to the public line and through the south     

CYCIAE-100回旋加速器测磁仪自动控制系统的研制

为满足100 MeV回旋加速器磁场测量要求,设计研制了一套测磁仪自动化控制装置。该装置采用周向与径向相结合的运动方式,对目标点磁场进行测量。周向运动采用开环控制,在软件上通过算法实现间接闭环控制,整个测磁过程,只需完成1次周向运动,缓解了由硬件原因带来的周向定位震荡问题。径向运动基于光栅位置反馈,由运动控制器实现自动闭环控制,该方案使角度精度达到±5″以内,径向精度达±5 μm,达到并优于理论设计要求,解决了中能回旋加速器磁场测量时间较长、精度低的难题,对100 MeV回旋加速器的束流强度及品质的提高有重要意义。     

Wobbling Magnet Design for the Beam Line of CYCIAE-100

In most cases, the extracted beam from cyclotrons is in Gaussian distribution, while in many applications uniformly distributed beam is needed. On account of this, the wobbling magnet is designed to satisfy the need. The wobbling magnet can form a uniform rolling magnet field perpendicular to the beam transfer direction, which enables the beam through the wobbling magnet to turn with it. As a result, the uniformity of the beam will be improved. Figure 1 suggests the course of turning.     

100 MeV强流质子回旋加速器剥离靶驱动控制系统研制

100 MeV强流质子回旋加速器(CYCIAE-100)加速负氢离子,引出系统为电荷交换方式的双向剥离引出系统,剥离靶是引出系统的核心装置。剥离靶系统四维联动定位精度要求高。为满足剥离靶驱动控制系统要求,采用了PLC控制驱动电路,读取位置反馈信号,对运动控制形成负反馈闭环的控制方法,实现了引出系统的各项运动控制要求并达到了设计指标。经调试,该加速器于2014年7月首次成功引出75~100 MeV质子束流,引出效率达99%以上。剥离靶驱动控制系统经加工调试,满足引出系统的各项技术要求,目前已投入运行2 a,可靠性得到了验证。     

Numerical Simulation of Main Magnet Electromagnetic Force and Deformation for CYCIAE-100 Project

The achievement of magnetic field plays a crucial part in the design of CYCIAE-100 cyclotron, which is assumed to satisfy various beam dynamics requirements. In the compact cyclotron, magnet deformation caused by gravity, electromagnetic force and atmospheric pressure, impacts the distribution of the field on the middle plane and the space nearby. If the deformation caused by gravity and electromagnetic force is small enough, the field change can be compensated in the field mapping and shimming phase. Otherwise,     

CYCIAE-100回旋加速器质子照相束流线控制系统的研制

为了对质子照相束流线设备进行远程监测与控制,实现束流线各子系统的安全联锁功能,研制了一套采用标准控制模型结构的分布式EPICS控制系统。该控制系统通过PLC组态实现了开关逻辑设备的安全联锁及工艺流程控制。核心控制系统采用EPICS建立了多个IOC作为控制器。针对不同CPU构架下的服务器搭建了交叉编译环境。针对数字电源设备与真空仪表设备使用StreamDevice完成设备驱动及通信协议的开发,并通过建立IOC动态数据库,实现了IOC对流设备和PLC信号的监测与控制功能。使用CSS设计OPI,实现了上位机对EPICS IOC中数据的透明访问。该束流线控制系统已成功应用于CYCIAE-100回旋加速器的质子照相物理实验中。通过长时间的运行,控制系统的可靠性、安全性得到了验证。控制系统的稳定运行,为质子照相实验的开展奠定了基础,对类似的控制系统研制具有一定的参考价值。