title: Generalized measurable ignition criterion for inertial confinement fusion.
abstract: A multidimensional measurable criterion for central ignition of inertial-confinement-fusion capsules is derived. The criterion accounts for the effects of implosion nonuniformities and depends on three measurable parameters: the neutron-averaged total areal density (rhoR(n)(tot)), the ion temperature (T(n)), and the yield over clean (YOC=ratio of the measured neutron yield to the predicted one-dimensional yield). The YOC measures the implosion uniformity. The criterion can be approximated by chi=(rhoR(n)(tot))(0.8) x (T(n)/4.7)(1.7)YOC(mu)>1 (where rhoR is in g cm(-2), T in keV, and mu approximately 0.4-0.5) and can be used to assess the performance of cryogenic implosions on the NIF and OMEGA. Cryogenic implosions on OMEGA have achieved chi approximately 0.02-0.03.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
authors.forename: P Y
authors.initials: PY
authors.lastname: Chang
authors.forename: R
authors.initials: R
authors.lastname: Betti
authors.forename: B K
authors.initials: BK
authors.lastname: Spears
authors.forename: K S
authors.initials: KS
authors.lastname: Anderson
authors.forename: J
authors.initials: J
authors.lastname: Edwards
authors.forename: M
authors.initials: M
authors.lastname: Fatenejad
authors.forename: J D
authors.initials: JD
authors.lastname: Lindl
authors.forename: R L
authors.initials: RL
authors.lastname: McCrory
authors.forename: R
authors.initials: R
authors.lastname: Nora
authors.forename: D
authors.initials: D
authors.lastname: Shvarts