Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (4): 50

Research on deposition rate of TiZrV/Pd film by DC magnetron sputtering method

Jie Wang, Bo Zhang, Yan-Hui Xu, Yong Wang

1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
• Contact: Bo Zhang E-mail:zhbo@ustc.edu.cn
• Supported by:

Supported by the National Natural Science Funds of China (No. 11205155) and Fundamental Research Funds for the Central Universities (WK2310000041).

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Jie Wang, Bo Zhang, Yan-Hui Xu, Yong Wang. Research on deposition rate of TiZrV/Pd film by DC magnetron sputtering method.Nuclear Science and Techniques, 2017, 28(4): 50
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Abstract:

An accelerator storage ring needs clean ultrahigh vacuum. A TiZrV non-evaporable getter (NEG) film deposited on interior walls of the chamber can realize distributed pumping, effective vacuum improvement and reduced longitudinal pressure gradient. But accumulation of pollutants such as N2 and O2 will decrease the adsorption
ability of the NEG, leading to a reduction of NEG lifetime. Therefore, an NEG thin film coated with a layer of Pd, which has high diffusion rate and absorption ability for
H2, can extend the service life of NEG and improve the pumping rate of H2 as well. In this paper, with argon as discharge gas, a magnetron sputtering method is adopted to
prepare TiZrV-Pd films in a long straight pipe. By SEM measurement, deposition rates of TiZrV-Pd films are analyzed under different deposition parameters, such as magnetic field strength, gas flow rate, discharge current, discharge voltage and working pressure. By comparing the experimental results with the simulation results based on Sigmund’s theory, the Pd deposition rate C can be estimated by the sputtered depth.