title: Combined neutron and x-ray imaging at the National Ignition Facility (invited).
abstract: X-ray and neutrons are commonly used to image inertial confinement fusion implosions, providing key diagnostic information on the fuel assembly of burning deuterium-tritium (DT) fuel. The x-ray and neutron data provided are complementary as the production of neutrons and x-rays occurs from different physical processes, but typically these two images are collected from different views with no opportunity for co-registration of the two images. Neutrons are produced where the DT fusion fuel is burning; X-rays are produced in regions corresponding to high temperatures. Processes such as mix of ablator material into the hotspot can result in increased x-ray production and decreased neutron production but can only be confidently observed if the two images are collected along the same line of sight and co-registered. To allow direct comparison of x-ray and neutron data, a combined neutron x-ray imaging system has been tested at Omega and installed at the National Ignition Facility to collect an x-ray image along the currently installed neutron imaging line of sight. This system is described, and initial results are presented along with prospects for definitive coregistration of the images.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: C R
authors.initials: CR
authors.lastname: Danly
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: K
authors.initials: K
authors.lastname: Christensen
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: V E
authors.initials: VE
authors.lastname: Fatherley
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D N
authors.initials: DN
authors.lastname: Fittinghoff
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: G P
authors.initials: GP
authors.lastname: Grim
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: R
authors.initials: R
authors.lastname: Hibbard
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: N
authors.initials: N
authors.lastname: Izumi
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D
authors.initials: D
authors.lastname: Jedlovec
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: F E
authors.initials: FE
authors.lastname: Merrill
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: D W
authors.initials: DW
authors.lastname: Schmidt
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Simpson
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: K
authors.initials: K
authors.lastname: Skulina
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: P L
authors.initials: PL
authors.lastname: Volegov
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: C H
authors.initials: CH
authors.lastname: Wilde