Plasma in supercritical fluid with densely populated clusters
- Title
- Plasma in supercritical fluid with densely populated clusters
- Authors
- YUN, GUNSU; 이승택; 이주호; 정석용; 김영욱; 지정영
- Date Issued
- 2019-10-25
- Publisher
- APS Division of Plasma Physics
- Abstract
- In supercritical fluid (SCF) with dense population of stable clusters (∼ 1000 mm−3; mean size ∼ 200 nm), elongated plasmas are produced
along the optical axis of laser pulse (532 nm, 6 ns, 400 mJ, peak intensity ∼ 1 TW/cm2).
The plasma has a strong afterglow with the lifetime up to 1 µs, increasing with the number density of clusters.
For argon SCF plasmas, the electron temperature and density estimated from continuum emission spectra are ∼ 1 eV and ∼ 10^21cm−3, respectively, corresponding to a high Coulomb coupling constant of the order of unity.
The radial diffusion is weak, smaller than the diffusion length predicted by the one-component plasma theory for moderate to strong Coulomb coupling.
These observations suggest that the presence of clusters strongly affects the particle and energy transport processes.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/102733
- Article Type
- Conference
- Citation
- The 61st Annual Meeting of the APS Division of Plasma Physics, 2019-10-25
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