التفاصيل البيبلوغرافية
| العنوان: |
Comparison of plastic, high density carbon, and beryllium as indirect drive NIF ablators. |
| المؤلفون: |
Kritcher, A. L., Clark, D., Haan, S., Yi, S. A., Zylstra, A. B., Callahan, D. A., Hinkel, D. E., Berzak Hopkins, L. F., Hurricane, O. A., Landen, O. L., MacLaren, S. A., Meezan, N. B., Patel, P. K., Ralph, J., Thomas, C. A., Town, R., Edwards, M. J. |
| المصدر: |
Physics of Plasmas; May2018, Vol. 25 Issue 5, pN.PAG-N.PAG, 15p, 1 Diagram, 5 Charts, 16 Graphs |
| مصطلحات موضوعية: |
ABLATIVE materials, HYDRODYNAMICS, BERYLLIUM, PLASTICS, CARBON, SYMMETRY breaking |
| مستخلص: |
Detailed radiation hydrodynamic simulations calibrated to experimental data have been used to compare the relative strengths and weaknesses of three candidate indirect drive ablator materials now tested at the NIF: plastic, high density carbon or diamond, and beryllium. We apply a common simulation methodology to several currently fielded ablator platforms to benchmark the model and extrapolate designs to the full NIF envelope to compare on a more equal footing. This paper focuses on modeling of the hohlraum energetics which accurately reproduced measured changes in symmetry when changes to the hohlraum environment were made within a given platform. Calculations suggest that all three ablator materials can achieve a symmetric implosion at a capsule outer radius of ∼1100 μm, a laser energy of 1.8 MJ, and a DT ice mass of 185 μg. However, there is more uncertainty in the symmetry predictions for the plastic and beryllium designs. Scaled diamond designs had the most calculated margin for achieving symmetry and the highest fuel absorbed energy at the same scale compared to plastic or beryllium. A comparison of the relative hydrodynamic stability was made using ultra-high resolution capsule simulations and the two dimensional radiation fluxes described in this work [Clark et al., Phys. Plasmas 25, 032703 (2018)]. These simulations, which include low and high mode perturbations, suggest that diamond is currently the most promising for achieving higher yields in the near future followed by plastic, and more data are required to understand beryllium. [ABSTRACT FROM AUTHOR] |
|
Copyright of Physics of Plasmas is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Scitation.