title: Electron refluxing and K-shell line emission from Ti foils irradiated with subpicosecond laser pulses at 527 nm.
abstract: We present data on emission of K-shell radiation from Ti foils irradiated with subpicosecond pulses of second harmonic radiation (527 nm) from the TARANIS laser system at intensities of up to 10(18) W cm(-2). The data are used to demonstrate that a resonance absorption type mechanism is responsible for absorption of the laser light and to estimate fast electron temperatures of 30-60 keV that are in broad agreement with expectation from models of absorption for a steep density gradient. Data taken with resin-backed targets are used to demonstrate clear evidence of electron refluxing even at the modest fast electron temperatures inferred.
authors.affiliation: Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, United Kingdom.
authors.forename: G
authors.initials: G
authors.lastname: Nersisyan
authors.forename: M
authors.initials: M
authors.lastname: Makita
authors.forename: K
authors.initials: K
authors.lastname: McKeever
authors.forename: T
authors.initials: T
authors.lastname: Dzelzainis
authors.forename: S
authors.initials: S
authors.lastname: White
authors.forename: E
authors.initials: E
authors.lastname: Nedanovska
authors.forename: B
authors.initials: B
authors.lastname: Kettle
authors.forename: R
authors.initials: R
authors.lastname: Nicholl
authors.forename: G
authors.initials: G
authors.lastname: Williams
authors.forename: D
authors.initials: D
authors.lastname: Riley
authors.forename: C L S
authors.initials: CL
authors.lastname: Lewis