Speaker
Description
Accurate state-resolved electron-molecule cross sections are essential for the quantitative description of low-temperature plasmas, negative ion sources, and neutral and charged particle beam systems. In particular, vibrational excitation processes induced by electron impact play a crucial role in determining molecular energy distributions, dissociative attachment rates, and the production efficiency of negative ions in hydrogen and hydrogen-containing plasmas. These mechanisms are directly relevant to the operation of high-current negative ion sources used in present and future fusion devices.
In my contribution I will present recent advances in the determination of electron-molecule vibrational excitation cross sections, with emphasis on resonant scattering processes and their impact on negative ion formation. Theoretical calculations and available experimental benchmarks will be discussed for molecular targets of relevance to plasma processing and fusion applications. Particular attention is devoted to the coupling between vibrational kinetics and dissociative electron attachment, which governs the generation of H⁻ and D⁻ ions in plasma sources.
| Visitor's Visa | yes |
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| Classification | Fundamental processes and modelling |