title: Experiments on radiative collapse in laser-produced plasmas relevant to astrophysical jets
abstract: We report a laser experiment of astrophysical interest on radiative jet formation. Conically shaped targets are irradiated by intense laser light. An ablated plasma flow collides at the axis of the cone targets, then propagates at high Mach number, forming a jetlike structure. We measure time-resolved x-ray self-emission images from the jets. The diameter of the jet increases with decreasing atomic number of the irradiated target, suggesting that the collimation is due to radiative cooling. Two-dimensional simulations reproduce essential features of the experimental results.
authors.affiliation: Institute of Laser Engineering, Osaka University, Suita, Osaka, 565-0871, Japan and Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA.
authors.initials: K
authors.lastname: Shigemori
authors.initials: R
authors.lastname: Kodama
authors.initials: DR
authors.lastname: Farley
authors.initials: T
authors.lastname: Koase
authors.initials: KG
authors.lastname: Estabrook
authors.initials: BA
authors.lastname: Remington
authors.initials: DD
authors.lastname: Ryutov
authors.initials: Y
authors.lastname: Ochi
authors.initials: H
authors.lastname: Azechi
authors.initials: J
authors.lastname: Stone
authors.initials: N
authors.lastname: Turner