【摘要】 高电荷态ECR离子源磁体的功率密度高、发热量大,磁体线圈的高效冷却是制约性能进一步提升的关键技术之一,是离子源磁体技术研究的重要内容。本文介绍了基于蒸发冷却技术的近代物理研究所第四代高电荷态ECR离子源(LECR4)的研制工作。该离子源磁体线圈采用饼式单元结构,利用线饼单元间的窄隙作为冷却工质的流动通道,液态蒸发冷却工质在通道内吸收线圈热量并汽化,气态的工质向上流动进入冷凝器而冷凝。基于冷却工质的相变过程,建立自循环蒸发冷却热力循环,实现对磁体线圈热量的传输。设计制作完成的LECR4离子源进行了系统试验,试验结果表明,采用自循环蒸发冷却方式的离子源磁体线圈长期稳定运行在60℃左右,各项磁场指标均达到设计要求。更多还原

【Abstract】 For high charge state electron cyclotron resonance ion source(ECRIS) magnet,generally,the power density is higher,and it generates a lot of heat.The efficient cooling of magnet coils is one of the key technologies which control the further improvement of high charge state ECRIS,and there are many researches aimed at cooling technology of magnet coils.This paper introduces the development work of high charge state ECRIS-LECR4 based on the evaporative cooling technology,which is the fourth generation ECRIS in institute of modern physics(IMP),Chinese Academy of Sciences.The disc unit structure is used in the magnet coils,and vertical cooling channels are arranged between coil units.The liquid coolant in channels absorbs the heat of coils,and evaporates into steam.This steam coolant automatically flows upward and into condenser,and condenses into liquid.Based on the phase change of coolant,the self-circulating evaporative cooling thermodynamic cycle is built,which realizes the heat transmission of magnet coils.The system tests of LECR4 ion source were completed after the manufacture.The test results show that magnetic coils can ensure secure and stable operation about 60°C under rated load,and the magnetic field parameters have reached the design requirements.更多还原