BEPCⅡ横向反馈激励器的水冷真空馈通

Experience in the Manufacture of Vacuum Feedthroughs with Cooling Water Jacket for the Transverse Feedback Kicker of BEPCⅡ

北京正负电子对撞机二期(BEPCⅡ)束流横向反馈激励器的馈通,采用了带水冷设计的自研非标陶瓷真空馈通。该馈通采用陶瓷-可代焊接在研制过程中,出现了陶瓷真空漏和弹性渗漏等问题,本文介绍了这些真空漏的表现、成因和解决方案,分享制备经验。同时,为了更好的介绍水冷真空馈通的研制过程,文章展示了四个版本的馈通设计图样。终版馈通满足严格的项目需求,运行良好。

A non-standard water-cooled,ultra-high vacuum(UHV) feedthrough has been successfully developed for the transverse feedback kicker of the Second Upgrade Project of Beijing Electron and Positron Collider.The self-developed feedthrough with water-cooling jacket was made of composite materials,including ceramics,oxygen-free copper,stainless-steel and kovar-alloy.The discussions with specific examples focused on: i) The strengths and weaknesses of the four upgraded design versions;ii) The technical problems and solutions,including but not limited to the vacuum-leakage of ceramics,leakage discharge,elastic leakage,fluid percolation at molecular scale,welding of metal-ceramic joints,and shock resistance.The test results show that the prototyped water-cooled ceramic UHV feedthrough meets the stringent design requirements and works pretty well.We suggest that the self-developed feedthrough be some technological in development of non-standard vacuum spare-parts and vacuum components.