Abstract

The influence of microgeometries on the Secondary Electron Yield (SEY) of surfaces is investigated. Laser written structures of different aspect ratio (height to width) on a copper surface tuned the SEY of the surface and reduced its value to less than unity. The aspect ratio of microstructures was methodically controlled by varying the laser parameters. The results obtained corroborate a recent theoretical model of SEY reduction as a function of the aspect ratio of microstructures. Nanostructures - which are formed inside the microstructures during the interaction with the laser beam - provided further reduction in SEY comparable to that obtained in the simulation of structures which were coated with an absorptive layer suppressing secondary electron emission.

Details

Title
Role of surface microgeometries on electron escape probability and secondary electron yield of metal surfaces
Author
Bajek, D 1 ; Wackerow, S 1 ; Zanin, D A 2 ; Baudin, L 2 ; Bogdanowicz, K 2 ; Garcia-Tabares, Valdivieso E 2 ; Calatroni, S 2 ; Di, Girolamo B 2 ; Sitko, M 2 ; Himmerlich, M 2 ; Taborelli, M 2 ; Chiggiato, P 2 ; Abdolvand, A 1 

 University of Dundee, School of Science & Engineering, Dundee, UK (GRID:grid.8241.f) (ISNI:0000 0004 0397 2876) 
 CERN, European Organization for Nuclear Research, Meyrin, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2343192061
Copyright
This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.