Search Results - "Spears, B. K"
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High-Performance Indirect-Drive Cryogenic Implosions at High Adiabat on the National Ignition Facility
Published in Physical review letters (26-09-2018)“…To reach the pressures and densities required for ignition, it may be necessary to develop an approach to design that makes it easier for simulations to guide…”
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Alpha Heating and Burning Plasmas in Inertial Confinement Fusion
Published in Physical review letters (26-06-2015)“…Estimating the level of alpha heating and determining the onset of the burning plasma regime is essential to finding the path towards thermonuclear ignition…”
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Observation of Hydrodynamic Flows in Imploding Fusion Plasmas on the National Ignition Facility
Published in Physical review letters (17-09-2021)“…Inertial confinement fusion implosions designed to have minimal fluid motion at peak compression often show significant linear flows in the laboratory,…”
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Improved Performance of High Areal Density Indirect Drive Implosions at the National Ignition Facility using a Four-Shock Adiabat Shaped Drive
Published in Physical review letters (01-09-2015)“…Hydrodynamic instabilities can cause capsule defects and other perturbations to grow and degrade implosion performance in ignition experiments at the National…”
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Numerical modeling of the sensitivity of x-ray driven implosions to low-mode flux asymmetries
Published in Physical review letters (14-02-2013)“…The sensitivity of inertial confinement fusion implosions, of the type performed on the National Ignition Facility (NIF) [1], to low-mode flux asymmetries is…”
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Transfer Learning to Model Inertial Confinement Fusion Experiments
Published in IEEE transactions on plasma science (01-01-2020)“…Inertial confinement fusion (ICF) experiments are designed using computer simulations that are approximations of reality and therefore must be calibrated to…”
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Inertially confined fusion plasmas dominated by alpha-particle self-heating
Published in Nature physics (01-08-2016)“…Alpha-particle self-heating, the process of deuterium–tritium fusion reaction products depositing their kinetic energy locally within a fusion reaction region…”
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Evidence for suprathermal ion distribution in burning plasmas
Published in Nature physics (01-01-2023)“…At the National Ignition Facility, inertial confinement fusion experiments aim to burn and ignite a hydrogen plasma to generate a net source of energy through…”
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Onset of hydrodynamic mix in high-velocity, highly compressed inertial confinement fusion implosions
Published in Physical review letters (23-08-2013)“…Deuterium-tritium inertial confinement fusion implosion experiments on the National Ignition Facility have demonstrated yields ranging from 0.8 to 7×10(14),…”
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Thermonuclear reactions probed at stellar-core conditions with laser-based inertial-confinement fusion
Published in Nature physics (01-12-2017)“…Stars are giant thermonuclear plasma furnaces that slowly fuse the lighter elements in the universe into heavier elements, releasing energy, and generating the…”
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Thin shell, high velocity inertial confinement fusion implosions on the national ignition facility
Published in Physical review letters (10-04-2015)“…Experiments have recently been conducted at the National Ignition Facility utilizing inertial confinement fusion capsule ablators that are 175 and 165 μm in…”
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Precision shock tuning on the national ignition facility
Published in Physical review letters (25-05-2012)“…Ignition implosions on the National Ignition Facility [J. D. Lindl et al., Phys. Plasmas 11, 339 (2004)] are underway with the goal of compressing…”
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Generalized measurable ignition criterion for inertial confinement fusion
Published in Physical review letters (02-04-2010)“…A multidimensional measurable criterion for central ignition of inertial-confinement-fusion capsules is derived. The criterion accounts for the effects of…”
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Performance of high-convergence, layered DT implosions with extended-duration pulses at the National Ignition Facility
Published in Physical review letters (22-11-2013)“…Radiation-driven, low-adiabat, cryogenic DT layered plastic capsule implosions were carried out on the National Ignition Facility (NIF) to study the…”
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Topological Bifurcations of Attracting 2-Tori of Quasiperiodically Driven Oscillators
Published in Journal of nonlinear science (01-12-2005)“…We examine the solutions to a damped, quasiperiodic (QP) Mathieu equation with cubic nonlinearities. The system is suspended in a four-dimensional phase space…”
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Fill-tube-induced mass perturbations on x-ray-driven, ignition-scale, inertial-confinement-fusion capsule shells and the implications for ignition experiments
Published in Physical review letters (16-11-2007)“…On the first inertial-confinement-fusion ignition facility, the target capsule will be DT filled through a long, narrow tube inserted into the shell…”
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Cognitive simulation models for inertial confinement fusion: Combining simulation and experimental data
Published 19-03-2021“…The design space for inertial confinement fusion (ICF) experiments is vast and experiments are extremely expensive. Researchers rely heavily on computer…”
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Burning plasma achieved in inertial fusion
Published in Nature (London) (27-01-2022)“…Obtaining a burning plasma is a critical step towards self-sustaining fusion energy 1 . A burning plasma is one in which the fusion reactions themselves are…”
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Design of inertial fusion implosions reaching the burning plasma regime
Published in Nature physics (01-03-2022)“…In a burning plasma state 1 – 7 , alpha particles from deuterium–tritium fusion reactions redeposit their energy and are the dominant source of heating. This…”
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The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state
Published in Nature communications (06-04-2024)“…Indirect Drive Inertial Confinement Fusion Experiments on the National Ignition Facility (NIF) have achieved a burning plasma state with neutron yields…”
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