title: Doppler measurement of implosion velocity in fast Z-pinch x-ray sources.
abstract: The observation of Doppler splitting in K-shell x-ray lines emitted from optically thin dopants is used to infer implosion velocities of up to 70 cm/μs in wire-array and gas-puff Z pinches at drive currents of 15-20 MA. These data can benchmark numerical implosion models, which produce reasonable agreement with the measured velocity in the emitting region. Doppler splitting is obscured in lines with strong opacity, but red-shifted absorption produced by the cooler halo of material backlit by the hot core assembling on axis can be used to diagnose velocity in the trailing mass.
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87185, USA. bmjones@sandia.gov
authors.forename: B
authors.initials: B
authors.lastname: Jones
authors.forename: C A
authors.initials: CA
authors.lastname: Jennings
authors.forename: J E
authors.initials: JE
authors.lastname: Bailey
authors.forename: G A
authors.initials: GA
authors.lastname: Rochau
authors.forename: Y
authors.initials: Y
authors.lastname: Maron
authors.forename: C A
authors.initials: CA
authors.lastname: Coverdale
authors.forename: E P
authors.initials: EP
authors.lastname: Yu
authors.forename: S B
authors.initials: SB
authors.lastname: Hansen
authors.forename: D J
authors.initials: DJ
authors.lastname: Ampleford
authors.forename: P W
authors.initials: PW
authors.lastname: Lake
authors.forename: G
authors.initials: G
authors.lastname: Dunham
authors.forename: M E
authors.initials: ME
authors.lastname: Cuneo
authors.forename: C
authors.initials: C
authors.lastname: Deeney
authors.forename: D V
authors.initials: DV
authors.lastname: Fisher
authors.forename: V I
authors.initials: VI
authors.lastname: Fisher
authors.forename: V
authors.initials: V
authors.lastname: Bernshtam
authors.forename: A
authors.initials: A
authors.lastname: Starobinets
authors.forename: L
authors.initials: L
authors.lastname: Weingarten
mesh_terms: D000042:Absorption; D000465:Algorithms; D004867:Equipment Design; D008280:Magnetics; D009038:Motion; D010825:Physics / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods; D013997:Time Factors; D014867:Water / Q000737:chemistry; D014965:X-Rays
chemical_list: D014867:Water