1. Reduced instability growth with high-adiabat high-foot implosions at the National Ignition Facility.
- Author
-
Casey DT, Smalyuk VA, Raman KS, Peterson JL, Berzak Hopkins L, Callahan DA, Clark DS, Dewald EL, Dittrich TR, Haan SW, Hinkel DE, Hoover D, Hurricane OA, Kroll JJ, Landen OL, Moore AS, Nikroo A, Park HS, Remington BA, Robey HF, Rygg JR, Salmonson JD, Tommasini R, and Widmann K
- Subjects
- Models, Chemical, Deuterium chemistry, Hydrodynamics, Nuclear Fusion, Tritium chemistry
- Abstract
Hydrodynamic instabilities are a major obstacle in the quest to achieve ignition as they cause preexisting capsule defects to grow and ultimately quench the fusion burn in experiments at the National Ignition Facility. Unstable growth at the ablation front has been dramatically reduced in implosions with "high-foot" drives as measured using x-ray radiography of modulations at the most dangerous wavelengths (Legendre mode numbers of 30-90). These growth reductions have helped to improve the performance of layered DT implosions reported by O. A. Hurricane et al. [Nature (London) 506, 343 (2014)], when compared to previous "low-foot" experiments, demonstrating the value of stabilizing ablation-front growth and providing directions for future ignition designs.
- Published
- 2014
- Full Text
- View/download PDF