title: Effect of reentrant cone geometry on energy transport in intense laser-plasma interactions.
abstract: The energy transport in cone-guided low- Z targets has been studied for laser intensities on target of 2.5x10(20) W cm(-2). Extreme ultraviolet (XUV) imaging and transverse optical shadowgraphy of the rear surfaces of slab and cone-slab targets show that the cone geometry strongly influences the observed transport patterns. The XUV intensity showed an average spot size of 65+/-10 microm for slab targets. The cone slabs showed a reduced spot size of 44+/-10 microm. The shadowgraphy for the aforementioned shots demonstrate the same behavior. The transverse size of the expansion pattern was 357+/-32 microm for the slabs and reduced to 210+/-30 microm. A transport model was constructed which showed that the change in transport pattern is due to suppression of refluxing electrons in the material surrounding the cone.
authors.affiliation: STFC Rutherford Appleton Laboratory, Chilton, Oxon, United Kingdom.
authors.forename: K L
authors.initials: KL
authors.lastname: Lancaster
authors.forename: M
authors.initials: M
authors.lastname: Sherlock
authors.forename: J S
authors.initials: JS
authors.lastname: Green
authors.forename: C D
authors.initials: CD
authors.lastname: Gregory
authors.forename: P
authors.initials: P
authors.lastname: Hakel
authors.forename: K U
authors.initials: KU
authors.lastname: Akli
authors.forename: F N
authors.initials: FN
authors.lastname: Beg
authors.forename: S N
authors.initials: SN
authors.lastname: Chen
authors.forename: R R
authors.initials: RR
authors.lastname: Freeman
authors.forename: H
authors.initials: H
authors.lastname: Habara
authors.forename: R
authors.initials: R
authors.lastname: Heathcote
authors.forename: D S
authors.initials: DS
authors.lastname: Hey
authors.forename: K
authors.initials: K
authors.lastname: Highbarger
authors.forename: M H
authors.initials: MH
authors.lastname: Key
authors.forename: R
authors.initials: R
authors.lastname: Kodama
authors.forename: K
authors.initials: K
authors.lastname: Krushelnick
authors.forename: H
authors.initials: H
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Nakatsutsumi
authors.forename: J
authors.initials: J
authors.lastname: Pasley
authors.forename: R B
authors.initials: RB
authors.lastname: Stephens
authors.forename: M
authors.initials: M
authors.lastname: Storm
authors.forename: M
authors.initials: M
authors.lastname: Tampo
authors.forename: W
authors.initials: W
authors.lastname: Theobald
authors.forename: L
authors.initials: L
authors.lastname: Van Woerkom
authors.forename: R L
authors.initials: RL
authors.lastname: Weber
authors.forename: M S
authors.initials: MS
authors.lastname: Wei
authors.forename: N C
authors.initials: NC
authors.lastname: Woolsey
authors.forename: T
authors.initials: T
authors.lastname: Yabuuchi
authors.forename: P A
authors.initials: PA
authors.lastname: Norreys
mesh_terms: D003198:Computer Simulation; D004735:Energy Transfer / Q000528:radiation effects*; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects*; D006358:Hot Temperature; D007834:Lasers; D008956:Models, Chemical
chemical_list: D005740:Gases