Artigo Acesso aberto Revisado por pares

Diagnosing fuel ρR and ρR asymmetries in cryogenic deuterium-tritium implosions using charged-particle spectrometry at OMEGA

2009; American Institute of Physics; Volume: 16; Issue: 4 Linguagem: Inglês

10.1063/1.3098540

ISSN

1527-2419

Autores

J. A. Frenje, Chong Li, F. H. Séguin, D. T. Casey, R. D. Petrasso, T. C. Sangster, R. Betti, V. Yu. Glebov, D. D. Meyerhofer,

Tópico(s)

Ion-surface interactions and analysis

Resumo

Determining fuel areal density (ρR) in moderate-ρR (100–200 mg/cm2) cryogenic deuterium-tritium (DT) implosions is challenging as it requires new spectrometry techniques and analysis methods to be developed. In this paper, we describe a new method for analyzing the spectrum of knock-on deuterons (KO-Ds), elastically scattered by primary DT neutrons, from which a fuel ρR can be inferred for values up to ∼200 mg/cm2. This new analysis method, which uses Monte Carlo modeling of a cryogenic DT implosion, improves significantly the previous analysis method in two fundamental ways. First, it is not affected by significant spatial-yield variations, which degrade the diagnosis of the fuel ρR (spatial yield variations of about ±20% are typically observed), and second, it does not break down when the fuel ρR exceeds ∼70 mg/cm2.

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