title: A high-speed two-frame, 1-2 ns gated X-ray CMOS imager used as a hohlraum diagnostic on the National Ignition Facility (invited).
abstract: A novel x-ray imager, which takes time-resolved gated images along a single line-of-sight, has been successfully implemented at the National Ignition Facility (NIF). This Gated Laser Entrance Hole diagnostic, G-LEH, incorporates a high-speed multi-frame CMOS x-ray imager developed by Sandia National Laboratories to upgrade the existing Static X-ray Imager diagnostic at NIF. The new diagnostic is capable of capturing two laser-entrance-hole images per shot on its 1024 × 448 pixels photo-detector array, with integration times as short as 1.6 ns per frame. Since its implementation on NIF, the G-LEH diagnostic has successfully acquired images from various experimental campaigns, providing critical new information for understanding the hohlraum performance in inertial confinement fusion (ICF) experiments, such as the size of the laser entrance hole vs. time, the growth of the laser-heated gold plasma bubble, the change in brightness of inner beam spots due to time-varying cross beam energy transfer, and plasma instability growth near the hohlraum wall.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: N
authors.initials: N
authors.lastname: Palmer
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: M
authors.initials: M
authors.lastname: Dayton
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: A
authors.initials: A
authors.lastname: Carpenter
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: M B
authors.initials: MB
authors.lastname: Schneider
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Bell
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D K
authors.initials: DK
authors.lastname: Bradley
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: L D
authors.initials: LD
authors.lastname: Claus
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: L
authors.initials: L
authors.lastname: Fang
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: T
authors.initials: T
authors.lastname: Hilsabeck
authors.affiliation: Laboratory for Laser Energetics, Rochester, New York 14623, USA.
authors.forename: M
authors.initials: M
authors.lastname: Hohenberger
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: O S
authors.initials: OS
authors.lastname: Jones
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Kilkenny
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Kimmel
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: G
authors.initials: G
authors.lastname: Robertson
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: G
authors.initials: G
authors.lastname: Rochau
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: M O
authors.initials: MO
authors.lastname: Sanchez
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Stahoviak
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: D C
authors.initials: DC
authors.lastname: Trotter
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Porter