1. Role of surface microgeometries on electron escape probability and secondary electron yield of metal surfaces
- Author
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D.A. Zanin, Sergio Calatroni, Stefan Wackerow, L. Baudin, Monika Sitko, Amin Abdolvand, E. Garcia Tabares Valdivieso, Paolo Chiggiato, Mauro Taborelli, Marcel Himmerlich, K. Bogdanowicz, David Bajek, and B. Di Girolamo
- Subjects
Materials science ,Yield (engineering) ,Nanostructure ,Aspect ratio ,lcsh:Medicine ,02 engineering and technology ,Electron ,01 natural sciences ,Molecular physics ,Article ,Secondary electrons ,law.invention ,Physics in General ,law ,0103 physical sciences ,lcsh:Science ,Multidisciplinary ,Surface patterning ,010308 nuclear & particles physics ,lcsh:R ,021001 nanoscience & nanotechnology ,Laser ,Microstructure ,Secondary emission ,Physics::Accelerator Physics ,lcsh:Q ,Experimental particle physics ,0210 nano-technology - 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.
- Published
- 2020