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Updated: Jun 13, 2025
Cryogenic Liquid Jets for High Repetition Rate Discovery Science
Published on: May 9, 2020
Persistent Hot-Spot Mix in Cryogenic Direct-Drive Fusion Experiments
R C Shah1, D Cao1, I V Igumenshchev1
1Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Abstract:
We show that an x-ray emission signature associated with acceleration phase mass injection [R. C. Shah et al., Phys. Rev. E 103, 023201 (2021)PRESCM2470-004510.1103/PhysRevE.103.023201] correlates with poor experimental hot-spot convergence and a reduced neutron production relative to expectations. It is shown that with increased target mass as well as with higher-design adiabats, this signature is reduced, whereas with increased debris on the target, the signature is increased. We estimate that the vapor region in typical best designs may have up to 2× the assumed hydrogen mass at the start of deceleration.
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