title: Population kinetics on K alpha lines of partially ionized Cl atoms.
abstract: A population kinetics code was developed to analyze K alpha emission from partially ionized chlorine atoms in hydrocarbon plasmas. Atomic processes are solved under collisional-radiative equilibrium for two-temperature plasmas. It is shown that the fast electrons dominantly contribute to ionize the K-shell bound electrons (i.e., inner-shell ionization) and the cold electrons to the outer-shell bound ones. Ratios of K alpha lines of partially ionized atoms are presented as a function of cold-electron temperature. The model was validated by observation of the K alpha lines from a chlorinated plastic target irradiated with 1 TW Ti:sapphire laser pulses at 1.5 x 10(17) W/cm(2), inferring a plasma temperature of about 100 eV on the target surface.
authors.affiliation: Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan. t.kawamura@gsi.de
authors.forename: Tohru
authors.initials: T
authors.lastname: Kawamura
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nishimura
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Koike
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ochi
authors.forename: Ryoji
authors.initials: R
authors.lastname: Matsui
authors.forename: Wen Yong
authors.initials: WY
authors.lastname: Miao
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Okihara
authors.forename: Shuji
authors.initials: S
authors.lastname: Sakabe
authors.forename: Ingo
authors.initials: I
authors.lastname: Uschmann
authors.forename: Eckhart
authors.initials: E
authors.lastname: Förster
authors.forename: Kunioki
authors.initials: K
authors.lastname: Mima