Use of d-H3e proton spectroscopy as a diagnostic of shell ρr in capsule implosion experiments with ∼0.2 NIF scale high temperature Hohlraums at Omega
| Autor: | C. K. Li, Evan Dodd, George A. Kyrala, Christian Stoeckl, N. D. Delamater, V. Y. Glebov, R. D. Petrasso, Nelson M. Hoffman, Doug Wilson, R. L. Singleton, Achim Seifter, J. A. Frenje |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 79:10E526 |
| ISSN: | 1089-7623 0034-6748 |
| Popis: | We present the calculations and preliminary results from experiments on the Omega laser facility using d-H3e filled plastic capsule implosions in gold Hohlraums. These experiments aim to develop a technique to measure shell ρr and capsule unablated mass with proton spectroscopy and will be applied to future National Ignition Facility (NIF) experiments with ignition scale capsules. The Omega Hohlraums are 1900 μm length×1200 μm diameter and have a 70% laser entrance hole. This is approximately a 0.2 NIF scale ignition Hohlraum and reaches temperatures of 265–275 eV similar to those during the peak of the NIF drive. These capsules can be used as a diagnostic of shell ρr, since the d-H3e gas fill produces 14.7 MeV protons in the implosion, which escape through the shell and produce a proton spectrum that depends on the integrated ρr of the remaining shell mass. The neutron yield, proton yield, and spectra change with capsule shell thickness as the unablated mass or remaining capsule ρr changes. Proton stoppi... |
| Databáze: | OpenAIRE |
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