A technique for measuring the propagation of a supersonic radiation front in foam via spatially resolved spectral imaging of a tracer layer

Taccetti, J. M.; Keiter, P. A.; Lanier, N. E.; Mussack, Katie; Belle, Kunegunda E.; Magelssen, G. R.

doi:10.1063/1.3685621

Cited by 17 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On a historical note, the target design has evolved. The original design of these targets deposited near solid density Ti on one half of the foam that had been split into two parts [10] . The foams were reunited and mounted.…”

Section: Designmentioning

confidence: 99%

Developing targets for radiation transport experiments at the Omega laser facility

Capelli

Charsley-Groffman

Randolph

et al. 2017

High Pow Laser Sci Eng

View full text Add to dashboard Cite

Targets have been developed to measure supersonic radiation transport in aerogel foams using absorption spectroscopy. The target consists of an aerogel foam uniformly doped with either titanium or scandium inserted into an undoped aerogel foam package. This creates a localized doped foam region to provide spatial resolution for the measurement. Development and characterization of the foams is a key challenge in addition to machining and assembling the two foams so they mate without gaps. The foam package is inserted into a beryllium sleeve and mounted on a gold hohlraum. The target is mounted to a holder created using additive manufacturing and mounted on a stalk. The manufacturing of the components, along with assembly and metrology of the target are described here.

show abstract

Section: Designmentioning

confidence: 99%

Developing targets for radiation transport experiments at the Omega laser facility

Capelli

Charsley-Groffman

Randolph

et al. 2017

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

“…The spectral diagnostic uses X-ray framing cameries coupled to a four-strip microchannel plate detector [25] with data collected via film with a 0.002 cm/pixel resolution. Imaging absorption spectroscopy makes it possible to resolve gradients in the material tempurature along the direction of the flow.…”

Section: Introductionmentioning

confidence: 99%

Designing radiation transport tests: Simulation-driven uncertainty-quantification of the COAX temperature diagnostic

Fryer¹,

Diaw²,

Fontes³

et al. 2020

High Energy Density Physics

View full text Add to dashboard Cite

One of the difficulties in developing accurate numerical models of radiation flow in a coupled radiation-hydrodynamics setting is accurately modeling the transmission across a boundary layer. The COAX experiment is a platform design to test this transmission including standard radiograph and flux diagnostics as well as a temperature diagnostic measuring the population of excitation levels and ionization states of a dopant embedded within the target material. Using a broad range of simulations, we study the experimental errors in this temperature diagnostic. We conclude with proposed physics experiments that show features that are much stronger than the experimental errors and provide the means to study transport models.

show abstract

“…Uncertainties and inaccuracies in radiationhydrodynamics modeling can also frustrate the design and interpretation of experiments to investigate fundamental plasma properties (e.g., opacities, equation of state, hydrodynamic instabilities) at HEDP-relevant densities and temperatures [12][13][14]. Both Omega and NIF, among other facilities, have completed a number of experiments in this category, and will continue to do so in the future [15,16].…”

Section: Introductionmentioning

confidence: 99%

Code-to-Code Comparison and Validation of the Radiation-Hydrodynamics Capabilities of the FLASH Code Using a Laboratory Astrophysical Jet

Orban¹,

Fatenejad²,

Lamb³

2020

Preprint

View full text Add to dashboard Cite

The potential for laser-produced plasmas to yield fundamental insights into high energy density physics (HEDP) and deliver other useful applications can sometimes be frustrated by uncertainties in modeling the properties and behavior of these plasmas using radiation-hydrodynamics codes. In an effort to overcome this and to corroborate the accuracy of the HEDP capabilities that have been added to the publicly available FLASH radiation-hydrodynamics code, we present detailed code-to-code comparisons between FLASH and the HYDRA code developed at Lawrence Livermore National Laboratory using previously published HYDRA simulations from Grava et al. 2008. That study describes a laser experiment that produced a jet-like feature that the authors compare to astrophysical jets. Importantly, the Grava et al. 2008 experiment included detailed x-ray interferometric measurements of electron number densities. Despite radically different methods for treating the computational mesh, and different equation of state and opacity models, the FLASH results greatly resemble the results from HYDRA and, most importantly, the experimental measurements of electron density. Having validated the FLASH code in this way, we use the code to further investigate and understand the formation of the jet seen in the Grava et al. (2008) experiment and discuss its relation to the Wan et al. (1997) experiment at the NOVA laser.

show abstract

A technique for measuring the propagation of a supersonic radiation front in foam via spatially resolved spectral imaging of a tracer layer

Cited by 17 publications

References 13 publications

Developing targets for radiation transport experiments at the Omega laser facility

Developing targets for radiation transport experiments at the Omega laser facility

Designing radiation transport tests: Simulation-driven uncertainty-quantification of the COAX temperature diagnostic

Code-to-Code Comparison and Validation of the Radiation-Hydrodynamics Capabilities of the FLASH Code Using a Laboratory Astrophysical Jet

Contact Info

Product

Resources

About