دورية أكاديمية
Absolute Hugoniot measurements from a spherically convergent shock using x-ray radiography.
| العنوان: | Absolute Hugoniot measurements from a spherically convergent shock using x-ray radiography. |
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| المؤلفون: | Swift DC; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Kritcher AL; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Hawreliak JA; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Lazicki A; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., MacPhee A; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Bachmann B; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Döppner T; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Nilsen J; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Collins GW; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Glenzer S; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA., Rothman SD; Atomic Weapons Establishment, Aldermaston, Berkshire RG7 4PR, United Kingdom., Kraus D; University of California-Berkeley, Berkeley, California 94720, USA., Falcone RW; University of California-Berkeley, Berkeley, California 94720, USA. |
| المصدر: | The Review of scientific instruments [Rev Sci Instrum] 2018 May; Vol. 89 (5), pp. 053505. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Institute Of Physics Country of Publication: United States NLM ID: 0405571 Publication Model: Print Cited Medium: Internet ISSN: 1089-7623 (Electronic) Linking ISSN: 00346748 NLM ISO Abbreviation: Rev Sci Instrum Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Publication: 1933- : Woodbury, N.Y. : American Institute Of Physics Original Publication: 1930-1932 : Menasha, WI : Optical Society of America |
| مستخلص: | The canonical high pressure equation of state measurement is to induce a shock wave in the sample material and measure two mechanical properties of the shocked material or shock wave. For accurate measurements, the experiment is normally designed to generate a planar shock which is as steady as possible in space and time, and a single state is measured. A converging shock strengthens as it propagates, so a range of shock pressures is induced in a single experiment. However, equation of state measurements must then account for spatial and temporal gradients. We have used x-ray radiography of spherically converging shocks to determine states along the shock Hugoniot. The radius-time history of the shock, and thus its speed, was measured by radiographing the position of the shock front as a function of time using an x-ray streak camera. The density profile of the shock was then inferred from the x-ray transmission at each instant of time. Simultaneous measurement of the density at the shock front and the shock speed determines an absolute mechanical Hugoniot state. The density profile was reconstructed using the known, unshocked density which strongly constrains the density jump at the shock front. The radiographic configuration and streak camera behavior were treated in detail to reduce systematic errors. Measurements were performed on the Omega and National Ignition Facility lasers, using a hohlraum to induce a spatially uniform drive over the outside of a solid, spherical sample and a laser-heated thermal plasma as an x-ray source for radiography. Absolute shock Hugoniot measurements were demonstrated for carbon-containing samples of different composition and initial density, up to temperatures at which K-shell ionization reduced the opacity behind the shock. Here we present the experimental method using measurements of polystyrene as an example. |
| تواريخ الأحداث: | Date Created: 20180606 Date Completed: 20180605 Latest Revision: 20180605 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1063/1.5032142 |
| PMID: | 29864815 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Scitation. | تدمد: | 1089-7623 |
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| DOI: | 10.1063/1.5032142 |