Using secondary-proton spectra to study the compression and symmetry of deuterium-filled capsules at OMEGA
| Autor: | K. M. Green, C. Sorce, P. B. Radha, D. D. Meyerhofer, R. D. Petrasso, K. Fletcher, V. Yu. Glebov, J. A. Frenje, S. Roberts, S. Kurebayashi, S. Padalino, J. M. Soures, M. D. Cable, Christian Stoeckl, C. K. Li, T. C. Sangster, Fredrick Seguin, Damien Hicks |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 9:2725-2737 |
| ISSN: | 1089-7674 1070-664X |
| Popis: | With new measurement techniques, high-resolution spectrometry of secondary fusion protons has been used to study compression and symmetry of imploded D2-filled capsules in direct-drive inertial-confinement-fusion experiments at the 60-beam OMEGA laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. Data from target capsules with ∼15 atmospheres of D2 fuel, in CH shells 19–27 μm thick, were acquired with a magnet-based, charged-particle spectrometer and with several new “wedge-range-filter”-based spectrometers incorporating special filters and CR39 nuclear track detectors. Capsules with 19-μm shells, imploded with similar laser energies (∼23 kJ) but different methods of single-beam laser smoothing, were studied and found to show different compression characteristics as indicated by the fuel areal density (determined by the ratio of secondary-proton yield to primary-neutron yield) and the total areal density (determined by the energy loss of protons due to slowing in the fuel and shell). In go... |
| Databáze: | OpenAIRE |
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