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Influence of Film Coating Thickness on Secondary Electron Emission Characteristics of Non-Evaporable Getter Ti-Hf-V-Zr Coated Open-Cell Copper Foam Substrates.

Authors :
Zhang J
Wang J
Gao Y
Hu Y
Xie Y
You Z
Wang S
Source :
Materials (Basel, Switzerland) [Materials (Basel)] 2022 Mar 16; Vol. 15 (6). Date of Electronic Publication: 2022 Mar 16.
Publication Year :
2022

Abstract

The application of vacuum materials with low secondary electron yield (SEY) is one of the effective methods to mitigate the electron cloud (EC). In this study, the Ti-Hf-V-Zr non-evaporable getter (NEG) film was deposited on open-cell copper foams with different pore sizes for the suppression of electron multipacting effects. Besides, the influence of the film thickness on the secondary electron emission (SEE) characteristics of Ti-Hf-V-Zr NEG film-coated open-cell copper foam substrates was investigated for the first time. The results highlighted that all uncoated and NEG-coated foamed porous copper substrates achieved a low SEY (<1.2), which reduced at least 40% compared to the traditional copper plates, and the foamed porous coppers with 1.34-μm-thick NEG coating had the lowest SEY. Moreover, the surface chemistry and the morphological and structural properties of foamed porous coppers of different pore sizes with and without Ti-Hf-V-Zr NEG films were systematically analyzed.

Details

Language :
English
ISSN :
1996-1944
Volume :
15
Issue :
6
Database :
MEDLINE
Journal :
Materials (Basel, Switzerland)
Publication Type :
Academic Journal
Accession number :
35329637
Full Text :
https://doi.org/10.3390/ma15062185