title: A spherical crystal imager for OMEGA EP.
abstract: A narrowband x ray imager for the Cu K(α) line at ~8 keV using a spherically bent quartz crystal has been implemented on the OMEGA EP laser at the University of Rochester. The quartz crystal is cut along the 2131 (211) planes for a 2d spacing of 0.3082 nm, resulting in a Bragg angle of 88.7°, very close to normal incidence. An optical system is used to remotely align the spherical crystal without breaking the vacuum of the target chamber. The images show a high signal-to-background ratio of typically >100:1 with laser energies ≥1 kJ at a 10-ps pulse duration and a spatial resolution of less than 10 μm.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA.
authors.forename: C
authors.initials: C
authors.lastname: Stoeckl
authors.forename: G
authors.initials: G
authors.lastname: Fiksel
authors.forename: D
authors.initials: D
authors.lastname: Guy
authors.forename: C
authors.initials: C
authors.lastname: Mileham
authors.forename: P M
authors.initials: PM
authors.lastname: Nilson
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: M J
authors.initials: MJ
authors.lastname: Shoup
authors.forename: W
authors.initials: W
authors.lastname: Theobald