1. Enhanced hot-electron production and strong-shock generation in hydrogen-rich ablators for shock ignition.
- Author
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Theobald, W., Bose, A., Yan, R., Betti, R., Lafon, M., Mangino, D., Christopherson, A. R., Stoeckl, C., Seka, W., Shang, W., Michel, D. T., Ren, C., Nora, R. C., Casner, A., Peebles, J., Beg, F. N., Ribeyre, X., Aisa, E. Llor, Colaïtis, A., and Tikhonchuk, V.
- Subjects
HOT carriers ,ABLATIVE materials ,ACOUSTIC wave propagation ,ELECTRONS ,MATERIALS at high temperatures - Abstract
Experiments were performed with CH, Be, C, and SiO
2 ablators interacting with high-intensity UV laser radiation (5×1015 W/cm2 , λ=351 nm) to determine the optimum material for hot-electron production and strong-shock generation. Significantly more hot electrons are produced in CH (up to ~13% instantaneous conversion efficiency), while the amount is a factor of ~2 to 3 lower in the other ablators. A larger hot-electron fraction is correlated with a higher effective ablation pressure. The higher conversion efficiency in CH is attributed to stronger damping of ion-acoustic waves because of the presence of light H ions. [ABSTRACT FROM AUTHOR]- Published
- 2017
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