用于ILC电子驱动正电子源的带铁磁流体密封旋转靶开发
Development of Rotating Target with Ferrofluid Seal for ILC Electron-Driven Positron Source
AI总结：
本文针对ILC电子驱动正电子源的高真空需求，设计了采用铁磁流体旋转真空密封的旋转靶，制造全尺寸原型并验证了其真空维持、抗辐射性能及超过一年的使用寿命，确立了该正电子产生靶技术。
摘要：
在ILC电子驱动正电子源中，加速管位于正电子产生靶的正下游以捕获产生的正电子，其运行需要高真空环境。我们设计了一种使用铁磁流体旋转真空密封的旋转靶，能够稳定维持$10^{-6}$ Pa的真空度和5 m/sec的切向速度，满足ILC正电子源的要求。我们制造了全尺寸原型机，并确认了旋转与稳定真空维持的兼容性。对铁磁流体抗辐射性能的各项测试表明，它能够承受正常ILC运行中六年的辐射照射而不退化，并继续表现出真空密封性能。对结构与材料与全尺寸靶相似的小尺寸靶进行的辐射照射测试，确认了其在正常ILC运行中经过两年辐射照射后的可操作性。包括热负荷、应力分析和冷却在内的设计，通过与SLC靶的比较，得出了靶的估计寿命超过一年的结论。这些结果证明并确立了ILC电子驱动正电子源中正电子产生靶的技术。
英文摘要：
In the ILC electron-driven positron source, acceleration tubes are located immediately downstream of the positron generation target to capture the generated positrons, necessitating high vacuum for their operation. We designed a rotating target using a ferrofluid rotating vacuum seal that can stably maintain a vacuum of $10^{-6}$ Pa and a tangential velocity of 5 m/sec, which meets the requirements of the ILC positron source. We fabricated a full-scale prototype and confirmed the compatibility of rotation and stable vacuum maintenance. Various tests on the radiation resistance of the ferrofluid demonstrated its ability to withstand six years of radiation exposure in normal ILC operation without degradation and to continue exhibiting vacuum sealing performance. Radiation exposure tests on a small-scale target with a structure and material similar to the full-scale target confirmed its operability after two years of radiation exposure in normal ILC operation. The design, including thermal load, stress analysis, and cooling, led to the conclusion of an estimated lifespan of the target of over one year, based on comparison with the SLC target. These results demonstrate and establish the technology of positron generation targets in the ILC electron-driven positron source.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
