title: Highly directive 18.9 nm nickel-like molybdenum x-ray laser operating at 150 mJ pump energy.
abstract: We experimentally demonstrate that by longitudinally pumping 2 mm long molybdenum preformed plasma with high-intensity 475 fs duration laser pulse, a highly directive soft-x-ray laser at 18.9 nm wavelength is generated. The divergence of the beam is evaluated to be of the submilliradian order, and only requires a pump laser energy of 150 mJ.
authors.affiliation: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ozaki
authors.forename: R A
authors.initials: RA
authors.lastname: Ganeev
authors.forename: A
authors.initials: A
authors.lastname: Ishizawa
authors.forename: T
authors.initials: T
authors.lastname: Kanai
authors.forename: H
authors.initials: H
authors.lastname: Kuroda