Brief Introduction

The Cryogenic Technology Group was founded in January 2011. The group is mainly engaged in the construction of large-scale 2k and 4K liquid helium cryogenic systems, the development of cryomodules, as well as the vacuum system, which are the mainly components of superconducting accelerators.  

Since its establishment, the Cryogenic Technology Group has undertaken and completed the construction of a set of 4K cryogenic system, a set of helium recovery purification system and several cryomodules suitable for the operation of various superconducting cavities. These systems are the main components of superconducting accelerator for ADS transmutation system , which is a national strategic leading project. 

The group has a set of Linde 1kW @ 4.2K LR280 refrigerator system, a set of 12000m3 helium recovery purification system, 7 sets of cryomodules (including 4 on-line operation), a set of superconducting cavity vertical test platform, which can achieve 2K and 4K test conditions. 

At present, the Cryogenic Technology Group is undertaking the construction of two cryogenic systems, respectively for HIAF and CIADS accelerator. Meanwhile, it is also responsible for the development of cryomodule for these two projects. 

There are 18 researchers in the group, including 8 with senior titles. 

Research Fields

1. 2K,4K Liquid Helium Cryogenic System 

2. Cryomodule Design 


1. Half-wave resonator cryomodule design of ADS injector[J], Wan Yuqin, Bai Feng, Han Yanning et al. Journal of Engineering Thermophysics, 2019, 40(01): 36-40. 

2. Heat leakage of a vertical test cryostat for superconducting cavity based on variable arranged radiation shield [J]. ShufengJin, Shuping Chen, Junhui Zhang, Hailin Su. Cryogenics, 2019, 991-6. 

3. Xiao-fei Niu, Feng Bai, Xianjin Wang, et al. Cryogenic System Design for HiAF iLinac. Nuclear Science and Techniques. 

4. Bai F, Niu X, Wang X, et al. Thermal design and performance of taper cavity cryomodule for ADS Injector II [J]. Cryogenics, 2018, 95:29-35.  

5. Feng Bai, Jun-Hui Zhang, Chuan-Fei Hu, Yu-Qin Wan, Xiao-Fei Niu, Yan-Ning Han, Peng Zhang, Yu-Gang Zhao, Li-zhen Ma,. Design, fabrication and performance of taper cavity cryomodule for ADS Injector II [J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 903:70-76. 

6. Testing research of cryogenic flange seal, Zhao Yugang, Hu Chuanfei, Guo Wanhong, Yin Yukui, Wan Yuqing, Guo Hao, Cryogenics & Superconductivity, 2017.1 

7. CRYOGENIC SYSTEM FOR THE ADS INJECTOR II IN IMP, CAS., X.H.GUO, T.JIN, H.L.SU, X.F.NIU, etc. Proceeding of LINAC2012, Tel-Aviv, Israel, ISBN 978-95450-122-9, 2012, P576 



NIU Xiaofei 

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