title: High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility.
abstract: The Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility measures the DT neutron spectrum from cryogenically layered inertial confinement fusion implosions. Yield, areal density, apparent ion temperature, and directional fluid flow are inferred from the MRS data. This paper describes recent advances in MRS measurements of the primary peak using new, thinner, reduced-area deuterated plastic (CD) conversion foils. The new foils allow operation of MRS at yields 2 orders of magnitude higher than previously possible, at a resolution down to ∼200 keV FWHM.
authors.affiliation: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: M
authors.initials: M
authors.lastname: Gatu Johnson
authors.affiliation: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Frenje
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Bionta
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: Casey
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Eckart
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: M P
authors.initials: MP
authors.lastname: Farrell
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: E P
authors.initials: EP
authors.lastname: Hartouni
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: R
authors.initials: R
authors.lastname: Hatarik
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: M
authors.initials: M
authors.lastname: Hoppe
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Kilkenny
authors.affiliation: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: C K
authors.initials: CK
authors.lastname: Li
authors.affiliation: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Petrasso
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: H G
authors.initials: HG
authors.lastname: Reynolds
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D B
authors.initials: DB
authors.lastname: Sayre
authors.affiliation: General Atomics, San Diego, California 92186, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Schoff
authors.affiliation: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: F H
authors.initials: FH
authors.lastname: Séguin
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: K
authors.initials: K
authors.lastname: Skulina
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: C B
authors.initials: CB
authors.lastname: Yeamans