PCA modeling of the L-shell Copper X-pinch plasma produced by the compact generator of ecole polytechnique
Résumé
Principal Component Analysis is applied and compared with the line ratios of special Ne-like transitions for investigating the electron beam effects on the L-shell Cu synthetic spectra1. The database for the principal component extraction is created over a non-LTE collisional radiative L-shell Copper model2. The extracted principal components are used as a database for Artificial Neural Network in order to estimate the plasma electron temperature, density and beam fractions from a representative time integrated spatially resolved L-Shell Cu X-pinch plasma spectrum3,4. The spectrum is produced by the explosion of 25-μm Cu wires on a compact LC (40 kV, 200 kA, 200 ns) generator5. The modeled plasma electron temperatures are about Te~125 eV and Ne=7×1019 cm-3 in the presence of the fraction of the beams with f~0.01 and centered energy of ~10 keV.