title: Measuring the absolute deuterium-tritium neutron yield using the magnetic recoil spectrometer at OMEGA and the NIF.
abstract: A magnetic recoil spectrometer (MRS) has been installed and extensively used on OMEGA and the National Ignition Facility (NIF) for measurements of the absolute neutron spectrum from inertial confinement fusion implosions. From the neutron spectrum measured with the MRS, many critical implosion parameters are determined including the primary DT neutron yield, the ion temperature, and the down-scattered neutron yield. As the MRS detection efficiency is determined from first principles, the absolute DT neutron yield is obtained without cross-calibration to other techniques. The MRS primary DT neutron measurements at OMEGA and the NIF are shown to be in excellent agreement with previously established yield diagnostics on OMEGA, and with the newly commissioned nuclear activation diagnostics on the NIF.
authors.affiliation: Plasma Science and Fusion Center, MIT, Cambridge, Massachusetts 02139, USA. dtcasey@psfc.mit.edu.
authors.forename: D T
authors.initials: DT
authors.lastname: Casey
authors.forename: J A
authors.initials: JA
authors.lastname: Frenje
authors.forename: M
authors.initials: M
authors.lastname: Gatu Johnson
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: V Yu
authors.initials: VY
authors.lastname: Glebov
authors.forename: J
authors.initials: J
authors.lastname: Katz
authors.forename: J P
authors.initials: JP
authors.lastname: Knauer
authors.forename: D D
authors.initials: DD
authors.lastname: Meyerhofer
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: R M
authors.initials: RM
authors.lastname: Bionta
authors.forename: D L
authors.initials: DL
authors.lastname: Bleuel
authors.forename: T
authors.initials: T
authors.lastname: Döppner
authors.forename: S
authors.initials: S
authors.lastname: Glenzer
authors.forename: E
authors.initials: E
authors.lastname: Hartouni
authors.forename: S P
authors.initials: SP
authors.lastname: Hatchett
authors.forename: S
authors.initials: S
authors.lastname: Le Pape
authors.forename: T
authors.initials: T
authors.lastname: Ma
authors.forename: A
authors.initials: A
authors.lastname: MacKinnon
authors.forename: M A
authors.initials: MA
authors.lastname: McKernan
authors.forename: M
authors.initials: M
authors.lastname: Moran
authors.forename: E
authors.initials: E
authors.lastname: Moses
authors.forename: H-S
authors.initials: HS
authors.lastname: Park
authors.forename: J
authors.initials: J
authors.lastname: Ralph
authors.forename: B A
authors.initials: BA
authors.lastname: Remington
authors.forename: V
authors.initials: V
authors.lastname: Smalyuk
authors.forename: C B
authors.initials: CB
authors.lastname: Yeamans
authors.forename: J
authors.initials: J
authors.lastname: Kline
authors.forename: G
authors.initials: G
authors.lastname: Kyrala
authors.forename: G A
authors.initials: GA
authors.lastname: Chandler
authors.forename: R J
authors.initials: RJ
authors.lastname: Leeper
authors.forename: C L
authors.initials: CL
authors.lastname: Ruiz
authors.forename: G W
authors.initials: GW
authors.lastname: Cooper
authors.forename: A J
authors.initials: AJ
authors.lastname: Nelson
authors.forename: K
authors.initials: K
authors.lastname: Fletcher
authors.forename: J
authors.initials: J
authors.lastname: Kilkenny
authors.forename: M
authors.initials: M
authors.lastname: Farrell
authors.forename: D
authors.initials: D
authors.lastname: Jasion
authors.forename: R
authors.initials: R
authors.lastname: Paguio