兰州重离子冷却储存环二极磁铁设计

介绍了兰州重离子冷却储存环主环(CSRm)的改进W型二极磁铁和实验环(CSRe)C型二极磁铁的磁场计算和物理设计,在降低了磁铁造价和运行费用的前提下设计参数达到或超过了物理要求.根据样机的加工和检测结果来看,所有的磁场计算和物理设计的结果是可靠的.Magnetic field calculation and design of CSRm modified W-type dipoles and of CSRe C-type dipoles are presented in this paper. Under the condition of lower cost, all of the designed parameters are better than required values. Now the prototype has been fabricated and also the magnetic field measurement has been done. According to the measured results, all the calculation and design are very reliable.     

Development of a superconducting solenoid for CADS

A superconducting focusing solenoid has been designed and developed for the China Accelerator Driven System (CADS). In order to meet the requirement of focusing strength and fringe field while minimizing the physical size of the solenoid, the novel optimizing design method based on a linear programming method was employed. In this report, the design of the solenoid including magnetic field optimization, mechanical design and quench protection will be introduced. The solenoid has been fabricated and tested. The testing results show that the central field reached 8.4 T and the stray field was lower than 50 Gauss in the cavity zone.     

Super-FRS超导磁体失超瞬态热应力分析

国际反质子与离子大科学工程(FAIR)项目是一个大型的国际合作项目,其中Super-FRS超导二极磁体由中国科学院近代物理研究所研制。利用ADINA有限元程序对项目中的超导Super-FRS磁体线圈的失超过程进行了模拟分析。利用C程序对ADINA程序进行二次开发以便对有限元求解器的调用和载荷的控制。分析结果显示:在失超过程中产生的最大热应力为26 MPa,可能产生的声波频率在35 Hz左右。     

Design of a superconducting magnet for CADS

This paper describes a superconducting magnet system for the China Accelerator Driven System (CADS). The magnetic field is provided by one main, two bucking and four racetrack coils. The main coil produces a central field of up to 7 T and the effective length is more than 140 mm, the two bucking coils can shield most of the fringe field, and the four racetrack superconducting coils produce the steering magnetic field. Its leakage field in the cavity zone is about 5× 10^-5 T when the shielding material Niobium and cryogenic permalloy are used as the Meissner shielding and passive shielding respectively. The quench calculations and protection system are also discussed.     

FAIR项目super-FRS超导磁体结构分析

 国际反质子与离子大科学工程项目中的超导super-FRS磁体包含2个超导线圈,最大磁场为1.6 T,这样大的磁场必然产生很大的电磁力。为了保证磁体运行时的机械稳定性,对项目中的超导super-FRS磁体进行了有限元结构的3维分析。结构分析中采用了ADINA和TOSCA两个有限元软件。ADINA软件主要用于结构中的应力应变计算,而TOSCA软件则主要用于电磁场的磁场强度和电磁力的计算。分析的结果显示super-FRS磁体采用铁芯及线圈盒长边中部加固结构时,其最大形变约0.19 mm,最大有效应力出现在长边中部的很小区域,约为92 MPa。由于线圈盒由316LN不锈钢制成,该结构是合理的。     

兰州重离子加速器冷却储存环kicker磁铁设计

 介绍了兰州重离子加速器冷却储存环（HIRFL-CSR）CSRm引出kicker磁铁的物理设计、参数计算以及结构设计和加工。为了减小电感，使上升时间达到要求，CSRm引出kicker磁铁采用分布式的传输线方案，同时将无感电容与磁铁并联以满足匹配的问题。磁铁用单匝线圈和铁氧体铁芯来降低电感、减少涡流损耗，并采取两台电源成对供电、导体一端共地的结构形式消除杂散电感和轴向场，这种方式不但消除了过桥的不利影响，而且可通过调节导体间距离方便的调节磁场均匀区宽度和磁铁电感。完成设计后磁铁电感小于1 μH，在140 mm范围内磁场均匀度好于±0. 5%，最高磁场达到0.038 T，最大峰值激磁电流约为2.5 kA。     

冷却储存环主环注入线四极磁铁测量

 介绍了兰州重离子加速器冷却储存环工程主环注入线四极磁铁谐波测磁系统和谐波磁场测量结果。分析了磁铁误差产生的原因以及磁铁加工存在的问题和注意事项。     

CSR60°二极C型铁磁场特性的研究

兰州重离子加速器冷却储存环主环注入线二极C型磁铁首次采用了磁极头中埋置垫补线圈调整磁场均匀度的设计.在其磁场测量中,使用了点测和积分测量的方法对其各方面特性参数进行了测量,并对积分场的测量结果以及内置垫补线圈对均匀场的垫补效果进行了详细的非线性分析.     

武威重离子治癌装置回旋注入系统的准直安装

武威重离子治癌装置回旋注入系统由自重50余吨的回旋加速器和离子源等多个元件组成,由于离子源和回旋加速器的上下共架结构及回旋注入系统自身过于紧凑等原因,给各元件的安装准直工作增加了难度。借助于激光跟踪仪和三维控制网,通过自下而上分级准直安装及高空架设仪器的方法,克服了通视条件不足等困难,有效提高了工作效率,所有的安装元件误差都控制在0.10 mm以内,其结果好于该装置的安装精度要求。回旋注入系统已成功出束,各项指标均已达到或优于设计指标,从而验证了准直安装工作的准确性与可行性。     

超导螺线管的冷铁轭优化

介绍了超导螺线管的冷铁轭优化设计方法, 即采用均匀设计结合有限元软件Opera作为试验手段进行研究。 对该方法进行了举例说明, 并得到物理量与参数之间的关系式, 并验证了关系式的精度, 以此证明此优化方法的可行性。 A method of studying the effect about cold yoke on the superconducting solenoid is introduced in this paper. In this method the uniform design table was used to arrange experiments. And then these experiments were executed by OPERA software package. Finally, the results were analyzed by the Stepwise Regression Analysis. An example according to the method is described and the reliability of this method is also proved.