title: Time-resolved measurements of hot-electron equilibration dynamics in high-intensity laser interactions with thin-foil solid targets.
abstract: Time-resolved K(α) spectroscopy has been used to infer the hot-electron equilibration dynamics in high-intensity laser interactions with picosecond pulses and thin-foil solid targets. The measured K(α)-emission pulse width increases from ~3 to 6 ps for laser intensities from ~10(18) to 10(19) W/cm(2). Collisional energy-transfer model calculations suggest that hot electrons with mean energies from ~0.8 to 2 MeV are contained inside the target. The inferred mean hot-electron energies are broadly consistent with ponderomotive scaling over the relevant intensity range.
authors.affiliation: Fusion Science Center for Extreme States of Matter, University of Rochester, Rochester, New York 14623, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Nilson
authors.forename: J R
authors.initials: JR
authors.lastname: Davies
authors.forename: W
authors.initials: W
authors.lastname: Theobald
authors.forename: P A
authors.initials: PA
authors.lastname: Jaanimagi
authors.forename: C
authors.initials: C
authors.lastname: Mileham
authors.forename: R K
authors.initials: RK
authors.lastname: Jungquist
authors.forename: C
authors.initials: C
authors.lastname: Stoeckl
authors.forename: I A
authors.initials: IA
authors.lastname: Begishev
authors.forename: A A
authors.initials: AA
authors.lastname: Solodov
authors.forename: J F
authors.initials: JF
authors.lastname: Myatt
authors.forename: J D
authors.initials: JD
authors.lastname: Zuegel
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: R
authors.initials: R
authors.lastname: Betti
authors.forename: D D
authors.initials: DD
authors.lastname: Meyerhofer