Mystery unraveled: The physics behind supra-thermal ions beyond Maxwellian distributions in burning plasmas of inertial confinement fusion
Peer-Reviewed Publication
Updates every hour. Last Updated: 24-Jun-2025 11:10 ET (24-Jun-2025 15:10 GMT/UTC)
A joint research team led by Prof. Jie Zhang found the reasons of discrepancies between experimental results of neutron spectral moment analyses and hydrodynamic predictions in nuclear burning plasmas in the recent inertial confinement fusion (ICF) experiments conducted at the National Ignition Facility, through unprecedented kinetic simulations incorporating large-angle collisions. These collisions generate supra-thermal ions during the deposition of alpha particles, causing deviations from the equilibrium state and falling outside the scope of the hydrodynamic descriptions. The kinetic simulations further reveal that large-angle collisions play a pivotal role in advancing the ignition moment and augmenting the deposition of α-particles in ICF nuclear burning plasmas.
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