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Fusion Science and Technology
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Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
S. W. Haan, D. S. Clark, S. H. Baxamusa, J. Biener, L. Berzak Hopkins, T. Bunn, D. A. Callahan, L. Carlson, T. R. Dittrich, M. J. Edwards, B. A. Hammel, A. Hamza, D. E. Hinkel, D. D. Ho, D. Hoover, W. Hsing, H. Huang, O. A. Hurricane, M. A. Johnson, O. S. Jones, A. L. Kritcher, O. L. Landen, J. D. Lindl, M. M. Marinak, A. J. MacKinnon, N. B. Meezan, J. Milovich, A. Nikroo, J. L. Peterson, P. Patel, H. F. Robey, J. D. Salmonson, V. A. Smalyuk, B. K. Spears, M. Stadermann, S. V. Weber, J. L. Kline, D. C. Wilson, A. N. Simakov, A. Yi
Fusion Science and Technology | Volume 70 | Number 2 | August-September 2016 | Pages 121-126
Technical Paper | doi.org/10.13182/FST15-244
Articles are hosted by Taylor and Francis Online.
Experiments and analysis in the 3 years since the 2012 Target Fabrication Meeting have resulted in significant improvement in understanding of the requirements for high-performance layered implosions. Three issues have been identified that significantly degrade the performance of the implosions as they were originally configured for National Ignition Facility experiments: capsule support system, time-dependent radiation asymmetry, and transverse oxygen nonuniformity in the glow discharge polymer (GDP) ablator. Analyses suggest that the shortfalls in these three areas can explain the degraded performance of the National Ignition Campaign implosions. We present the status of work toward curing these three problems in the standard GDP ablator/gold hohlraum configuration as they affect target fabrication priorities. We also summarize the prospects for alternate ablators that might reduce these degradation mechanisms.