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Thermal analysis and experimental study of cryostat for superconducting wiggler of the HEPS-TF
Cryogenics ( IF 2.1 ) Pub Date : 2021-05-01 , DOI: 10.1016/j.cryogenics.2021.103307
Xiangzhen Zhang , Miaofu Xu , Rui Ye , Lin Bian , Xiaochen Yang , Liangrui Sun , Jincan Wang , Shaopeng Li , Huihua Lu , Fusan Chen , Rui Ge

As an insertion device, the superconducting wiggler has been developed for about 40 years, the superconducting magnet of which is usually made of NbTi and set in a cryostat. The performance of the cryostat is vital to the success of the superconducting wiggler. In this paper, a cryostat of the superconducting wiggler with 32 poles and 2.6 T field for the High Energy Photon Source Test Facility (HEPS-TF) was developed in the Institute of High Energy Physics (IHEP). In the cryostat, a novel design of thermal structure and cooling capacity distribution was proposed. Compared with the conventional two thermal shields, the single thermal shield was adopted to simplify the mechanical design, which was extended to the outside of the vacuum chamber to decrease the heat loads at 4.2 K. The current leads were optimized to minimize the heat loads at 60 K. After the systematic thermal analysis and optimization, the total heat load was covered by the four Gifford-Mcmahon cryocoolers successfully. In the experiment, the measured heat load was 3.85 W with magnet current of 320 A and beam of 250 mA. And the residual cooling power was 0.65 W.



中文翻译:

HEPS-TF超导摆动器的低温恒温器的热分析和实验研究

作为插入装置,超导摆动器已经开发了大约40年,其超导磁体通常由NbTi制成并置于低温恒温器中。低温恒温器的性能对于超导摆动器的成功至关重要。在本文中,高能物理研究所(IHEP)开发了具有32极和2.6 T场的超导摆动器的低温恒温器,用于高能光子源测试设施(HEPS-TF)。在低温恒温器中,提出了一种新颖的热结构和制冷量分布设计。与传统的两个热屏蔽罩相比,采用单个热屏蔽罩简化了机械设计,该热屏蔽罩扩展到了真空室的外部,以减小4.2 K时的热负荷。优化了电流引线,以最大程度地减小了60K。经过系统的热分析和优化后,四个Gifford-Mcmahon制冷机成功地覆盖了总的热负荷。在实验中,测得的热负荷为3.85 W,磁铁电流为320 A,电子束为250 mA。剩余冷却功率为0.65W。

更新日期:2021-05-17
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