Optical and spectroscopic study of a supersonic flowing helium plasma: energy transport in the afterglow
| العنوان: | Optical and spectroscopic study of a supersonic flowing helium plasma: energy transport in the afterglow |
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| المؤلفون: | A. di Leva, Lucio Gialanella, Fernando Brandi, D. Rapagnani, Raffaele Buompane, L. Labate, La Gizzi |
| المساهمون: | Brandi, F., Labate, L., Rapagnani, D., Buompane, R., Leva, A., Gialanella, L., Gizzi, L. A., Di Leva, A. |
| المصدر: | Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-10 (2020) |
| بيانات النشر: | Nature Publishing Group UK, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | inorganic chemicals, Materials science, genetic structures, Astrophysics::High Energy Astrophysical Phenomena, lcsh:Medicine, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, Article, Ion, Plasma physics, Techniques and instrumentation, Physics::Plasma Physics, Ionization, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Helium dimer, Physics::Atomic Physics, lcsh:Science, Helium, 010302 applied physics, Jet (fluid), Multidisciplinary, lcsh:R, Plasma afterglow, Plasma, respiratory system, 021001 nanoscience & nanotechnology, Afterglow, respiratory tract diseases, chemistry, lcsh:Q, Atomic physics, 0210 nano-technology, circulatory and respiratory physiology |
| الوصف: | Flowing plasma jets are increasingly investigated and used for surface treatments, including biological matter, and as soft ionization sources for mass spectrometry. They have the characteristic capability to transport energy from the plasma excitation region to the flowing afterglow, and therefore to a distant application surface, in a controlled manner. The ability to transport and deposit energy into a specimen is related to the actual energy transport mechanism. In case of a flowing helium plasma, the energy in the flowing afterglow may be carried by metastable helium atoms and long-lived helium dimer ions. In this work a systematic investigation of the optical and spectroscopic characteristics of a supersonic flowing helium plasma in vacuum and its afterglow as function of the helium gas density is presented. The experimental data are compared with numerical modeling of the plasma excitation and helium dimer ion formation supported by a Computational Fluid Dynamic simulation of the helium jet. The results indicate that the plasma afterglow is effectively due to helium dimer ions recombination via a three-body reaction. |
| اللغة: | English |
| تدمد: | 2045-2322 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04a77588d813dffc2dea48b1f9bb988d http://europepmc.org/articles/PMC7083830 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....04a77588d813dffc2dea48b1f9bb988d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20452322 |
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