Principal component analysis of electron beams generated in K-shell aluminum X-pinch plasma produced by a compact LC-generator
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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-mu m 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 T-e = 100 eV, density of N-e = 1 x 10(20) cm(-3) and hot electron fraction of f = 0.2 (with a beam energy centered at 10 keV). (C) 2015 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
X pinch plasma; Electron beams; Principal component analysis; Pattern recognition; Plasma electron beam diagnostics; Collective Behaivor
Kaynak
High Energy Density Physics
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
15
