title: Extended performance gas Cherenkov detector for gamma-ray detection in high-energy density experiments.
abstract: A new Gas Cherenkov Detector (GCD) with low-energy threshold and high sensitivity, currently known as Super GCD (or GCD-3 at OMEGA), is being developed for use at the OMEGA Laser Facility and the National Ignition Facility (NIF). Super GCD is designed to be pressurized to ≤400 psi (absolute) and uses all metal seals to allow the use of fluorinated gases inside the target chamber. This will allow the gamma energy threshold to be run as low at 1.8 MeV with 400 psi (absolute) of C2F6, opening up a new portion of the gamma ray spectrum. Super GCD operating at 20 cm from TCC will be ∼400 × more efficient at detecting DT fusion gammas at 16.7 MeV than the Gamma Reaction History diagnostic at NIF (GRH-6m) when operated at their minimum thresholds.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: H W
authors.initials: HW
authors.lastname: Herrmann
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Y H
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: C S
authors.initials: CS
authors.lastname: Young
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: V E
authors.initials: VE
authors.lastname: Fatherley
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: F E
authors.initials: FE
authors.lastname: Lopez
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Oertel
authors.affiliation: National Security Technologies, LLC, Los Alamos, New Mexico 87544, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Malone
authors.affiliation: Atomic Weapons Establishment, Aldermaston, Berkshire RG7 4PR, United Kingdom.
authors.forename: M S
authors.initials: MS
authors.lastname: Rubery
authors.affiliation: Atomic Weapons Establishment, Aldermaston, Berkshire RG7 4PR, United Kingdom.
authors.forename: C J
authors.initials: CJ
authors.lastname: Horsfield
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: W
authors.initials: W
authors.lastname: Stoeffl
authors.affiliation: Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A B
authors.initials: AB
authors.lastname: Zylstra
authors.affiliation: Laboratory for Laser Energetics, Rochester, New York 14623, USA.
authors.forename: W T
authors.initials: WT
authors.lastname: Shmayda
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: S H
authors.initials: SH
authors.lastname: Batha