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Role of surface microgeometries on electron escape probability and secondary electron yield of metal surfaces.
- Source :
-
Scientific reports [Sci Rep] 2020 Jan 14; Vol. 10 (1), pp. 250. Date of Electronic Publication: 2020 Jan 14. - Publication Year :
- 2020
-
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
- Language :
- English
- ISSN :
- 2045-2322
- Volume :
- 10
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Scientific reports
- Publication Type :
- Academic Journal
- Accession number :
- 31937857
- Full Text :
- https://doi.org/10.1038/s41598-019-57160-w