title: Evidence for stratification of deuterium-tritium fuel in inertial confinement fusion implosions.
abstract: Measurements of the D(d,p)T (dd) and T(t,2n)(4)He (tt) reaction yields have been compared with those of the D(t,n)(4)He (dt) reaction yield, using deuterium-tritium gas-filled inertial confinement fusion capsule implosions. In these experiments, carried out on the OMEGA laser, absolute spectral measurements of dd protons and tt neutrons were obtained. From these measurements, it was concluded that the dd yield is anomalously low and the tt yield is anomalously high relative to the dt yield, an observation that we conjecture to be caused by a stratification of the fuel in the implosion core. This effect may be present in ignition experiments planned on the National Ignition Facility.
authors.affiliation: Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: Casey
authors.forename: J A
authors.initials: JA
authors.lastname: Frenje
authors.forename: M Gatu
authors.initials: MG
authors.lastname: Johnson
authors.forename: M J-E
authors.initials: MJ
authors.lastname: Manuel
authors.forename: H G
authors.initials: HG
authors.lastname: Rinderknecht
authors.forename: N
authors.initials: N
authors.lastname: Sinenian
authors.forename: F H
authors.initials: FH
authors.lastname: Séguin
authors.forename: C K
authors.initials: CK
authors.lastname: Li
authors.forename: R D
authors.initials: RD
authors.lastname: Petrasso
authors.forename: P B
authors.initials: PB
authors.lastname: Radha
authors.forename: J A
authors.initials: JA
authors.lastname: Delettrez
authors.forename: V Yu
authors.initials: VY
authors.lastname: Glebov
authors.forename: D D
authors.initials: DD
authors.lastname: Meyerhofer
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: D P
authors.initials: DP
authors.lastname: McNabb
authors.forename: P A
authors.initials: PA
authors.lastname: Amendt
authors.forename: R N
authors.initials: RN
authors.lastname: Boyd
authors.forename: J R
authors.initials: JR
authors.lastname: Rygg
authors.forename: H W
authors.initials: HW
authors.lastname: Herrmann
authors.forename: Y H
authors.initials: YH
authors.lastname: Kim
authors.forename: A D
authors.initials: AD
authors.lastname: Bacher