Principal component analysis of electron beams generated in K-shell aluminum X-pinch plasma produced by a compact LC-generator
| Autor: | Yusuf Danisman, Jean Larour, M. F. Yilmaz, Leonid E. Aranchuk |
|---|---|
| Přispěvatelé: | Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Nuclear and High Energy Physics
Radiation Materials science X pinch plasma Collective Behavior Plasma parameters Electron shell Principal component analysis Electron beams Plasma Electron Plasma electron beam diagnostics 01 natural sciences Spectral line 010305 fluids & plasmas [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] Pattern recognition 0103 physical sciences Pinch Atomic physics 010306 general physics Beam (structure) |
| Zdroj: | High Energy Density Physics High Energy Density Physics, 2015, 15 (06), pp.43-48. ⟨10.1016/j.hedp.2015.03.010⟩ High Energy Density Physics, Elsevier, 2015, 15 (06), pp.43-48. ⟨10.1016/j.hedp.2015.03.010⟩ |
| ISSN: | 1574-1818 |
| DOI: | 10.1016/j.hedp.2015.03.010⟩ |
| Popis: | International audience; Principal component analysis (PCA) method is applied and compared with the line ratios of H-like and He-like transitions, in order to investigate the effects of electron beam on the K-shell Aluminum synthetic spectra. It is also used as a diagnostics to estimate the plasma parameters of K-shell Al X-pinch plasma spectrum. This spectrum is produced by the explosion of two 25-μm Al wires on a compact LC (40 kV, 200 kA) generator. The database for the principal component extraction is created over a previously developed, non-LTE, collisional radiative K-shell Aluminum model. As a result, PCA shows an agreement with the line ratios which are sensitive to plasma electron temperatures, densities and beam fractions. Principal component analysis also illustrates that the addition to the non-LTE model of a fraction f of electrons in an energetic beam, generates the clusters in a three dimensional vector space which are translations of each other and follows reverse v-shaped cascade trajectories, except for the f = 0.0 case. Modeling of a typical shot by PCA gives the plasma electron temperature of Te = 100 eV, density of Ne = 1 × 1020 cm−3 and hot electron fraction of f = 0.2 (with a beam energy centered at 10 keV). |
| Databáze: | OpenAIRE |
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