The influence of low energy titanium ion beam irradiation on secondary electron emission of metal materials by electron impact
| Autor: | Yang Jie, Jialong He, Shi Jinshui, Jie Li, Jidong Long, Chen Xin, Zhao Wei, Pan Dong, Liu Erxiang, Zhen Yang, Chaohui Lan, Wang Tao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics::Instrumentation and Detectors Analytical chemistry General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ion source Secondary electrons 0104 chemical sciences Surfaces Coatings and Films Ion Ion implantation chemistry Physics::Plasma Physics Sputtering Secondary emission Irradiation 0210 nano-technology Titanium |
| Zdroj: | Applied Surface Science. 515:145990 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2020.145990 |
| Popis: | Argon ion beams with energy from hundreds eV to several keV can suppress the secondary electron emission (SEE) on surface of metal materials by changing surface morphology and chemical composition of the materials through surface sputtering. In this work, it was found that the low-energy titanium ion irradiation with an average energy from 40 keV to 100 keV did not apparently change the surface morphology and chemical composition of the metal materials, but still significantly reduced the secondary electron yield (SEY) of the materials. Pulsed titanium ion beams generated by an ion implanter, which is based on metal evaporation vacuum arc (MEVVA) ion source, were adopted to irradiate oxygen-free copper and stainless-steel samples. The fluence of titanium ions was in the range of 1 × 1015 to 1 × 1017 ions/cm2. By comparing the effects of different titanium ion energies and fluence on the roughness, chemical composition, total SEY of the sample surface, and calculating the ion range, sputtering yield, nuclear stopping power and defect distribution of titanium ions in these materials, it is reasonable to believe that the irradiation damage caused by titanium ion implantation increases the probability of trapping of the low-energy secondary electrons (SEs) by defects, leading to better SEE suppressing. |
| Databáze: | OpenAIRE |
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