A Physical Metric for Inertial Confinement Fusion Capsules

Cheng, Baolian; Bradley, Paul Andrew

doi:10.3390/plasma7010010

Title: A Physical Metric for Inertial Confinement Fusion Capsules

Journal Article · 21 February 2024 · Plasma

DOI: https://doi.org/10.3390/plasma7010010 · OSTI ID:2315653

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Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

The performance of fusion capsules on the National Ignition Facility (NIF) is strongly affected by the physical properties of the hot deuterium–tritium (DT) fuel, such as the mass, areal density, and pressure of the hot spot at the stagnation time. All of these critical quantities depend on one measured quantity, which is the ratio of the specific peak implosion energy to the specific internal energy of the hot spot. This unique physical quantity not only can measure the incremental progress of the inertial confinement fusion capsules towards ignition but also measures the conversion of the peak implosion kinetic energy of the pusher shell into the internal energy of the hot fuel in a capsule. Analysis of existing NIF shots to date are performed. The ratio metric is compared quantitatively with the ignition criterion. Results provide new perspectives on the NIF experiments by which the performance of the burning plasma can be determined and controlled through the fine tune of the implosion parameters, which improves future designs and predictions of the ignition capsules.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2315653

Report Number(s):: LA-UR-22-29690; TRN: US2409227

Journal Information:: Plasma, Vol. 7, Issue 1; ISSN 2571-6182

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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