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| Effect of BCP surface treatment on the properties of superconducting niobium materials |
| BAO Xifang，XIE Yongxu，WANG Huihui |
| （Ningxia Oriental Tantalum Industry Co., Ltd, Shizuishan 753000, China） |
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Abstract The superconducting niobium high RF cavity, as the core component of the X-ray free electron laser de‐
vice linear accelerator, works at 2.0K to accelerate the electrons to the desired energy. The accelerated cavity of the
superconducting high RF cavity is made of high purity niobium material. After this niobium material is electron
beam melting, forging, rolling, vacuum annealing and BCP chemical polishing treatment, the performance meets
the requirements of superconducting high RF cavity, and the high purity niobium materia is processed by deep
stamping and electron beam welding. High purity niobium material has high residual resistance ratio RRR value
and excellent mechanical properties, but also requires niobium material to have good surface quality, Therefore, the
selection of the appropriate BCP chemical surface treatment method is an important research content in the process
of preparing high quality superconducting niobium material.
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Received: 06 May 2022
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2023, Vol. 33 
