期刊
VACUUM
卷 192, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2021.110445
关键词
Photon-stimulated desorption; Synchrotron radiation; Coating; Pumping speed; Hydrogen diffusion
Gas desorption from copper tubes coated with Pd or Pd/TiZrV in response to synchrotron radiation was investigated. The results showed that Pd/TiZrV film exhibited lower H2 desorption yield compared to TiZrV film. Pd film had a higher H2 pumping rate and was more likely to release H2 and CO during activation, which reduced the photon-stimulated desorption yield of the Pd layer.
Gas desorption from copper tubes coated with Pd or Pd/TiZrV in response to synchrotron radiation was investigated. Following activation (250 degrees C for 4 h), Pd/TiZrV film exhibited H2 desorption yield that was over one order of magnitude lower than that from TiZrV film. The Pd and Pd/TiZrV films also desorbed smaller amount of CO and CO2 during exposure. Compared to the TiZrV film, the Pd film exhibited a higher H2 pumping rate and was more likely to release H2 and CO during activation. These characteristics are considered to have reduced the photon-stimulated desorption yield of the Pd layer.
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