Stochastic optimization of a uranium oxide reaction mechanism using plasma flow reactor measurements

Autor: Mikhail Finko, Batikan Koroglu, Kate E. Rodriguez, Timothy P. Rose, Jonathan C. Crowhurst, Davide Curreli, Harry B. Radousky, Kim B. Knight

Publikováno v: Scientific Reports, Vol 13, Iss 1, Pp 1-24 (2023)

Abstract In this work, a coupled Monte Carlo Genetic Algorithm (MCGA) approach is used to optimize a gas phase uranium oxide reaction mechanism based on plasma flow reactor (PFR) measurements. The PFR produces a steady Ar plasma containing U, O, H, a

Externí odkaz: https://doaj.org/article/ceb724d9c057403c9460b983150645b7

Melting and refreezing of zirconium observed using ultrafast x-ray diffraction

Autor: Harry B. Radousky, Michael R. Armstrong, Ryan A. Austin, Elissaios Stavrou, Shaughnessy Brown, Alexander A. Chernov, Arianna E. Gleason, Eduardo Granados, Paulius Grivickas, Nicholas Holtgrewe, Hae Ja Lee, Sergey S. Lobanov, Bob Nagler, Inhyuk Nam, Vitali Prakapenka, Clemens Prescher, Peter Walter, Alexander F. Goncharov, Jonathan L. Belof

Publikováno v: Physical Review Research, Vol 2, Iss 1, p 013192 (2020)

Ultrafast (130-fs) x-ray diffraction at the Linac Coherent Light Source has been applied to observe shock melting, which is driven by a rapid (120-ps) laser pulse impinging on a thin (few micrometers) bilayer of aluminum/zirconium. At a pressure of 1

Externí odkaz: https://doaj.org/article/311571889005431abcf6407b9e83affa

Cold Spray Deposition of Thermoelectric Materials

Autor: Alyssa Maich, Elissaios Stavrou, Scott K. McCall, Alexander A. Baker, Harry B. Radousky, Nathan Woollett, Richard Thuss

Publikováno v: JOM. 72:2853-2859

Thermoelectric materials convert heat flux to electricity (or vice versa as Peltier coolers); however, their application to harvest waste heat is limited by challenges in fabrication and materials optimization. Here, cold-spray deposition is used as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d11593cc90631e2a039111c3b9b8664
https://doi.org/10.1007/s11837-020-04151-2

The effect of oxygen concentration on the speciation of laser ablated uranium

Autor: Mark A, Burton, Alex W, Auner, Jonathan C, Crowhurst, Peter S, Boone, Lauren A, Finney, David G, Weisz, Batikan, Koroglu, Igor, Jovanovic, Harry B, Radousky, Kim B, Knight

Publikováno v: Scientific reports. 12(1)

In order to model the fate and transport of particles following a nuclear explosion, there must first be an understanding of individual physical and chemical processes that affect particle formation. One interaction pertinent to fireball chemistry an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::9ec3997f2b3b5257310507e90a58b50b
https://pubmed.ncbi.nlm.nih.gov/35256710

Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction

Autor: Clemens Prescher, Joseph T. McKeown, Jonathan C. Crowhurst, Eduardo Granados, Inhyuk Nam, Elissaios Stavrou, Sergey S. Lobanov, Jonathan L. Belof, Peter Walter, S. Brown, John D. Roehling, Bob Nagler, Art J. Nelson, Alexander F. Goncharov, Harry B. Radousky, Graeme J. Ackland, Arianna Gleason, Nick Teslich, Tian T. Li, Vitali B. Prakapenka, Nicholas Holtgrewe, Hongxiang Zong, Michael R. Armstrong, Ryan A. Austin, Hae Ja Lee, Paulius Grivickas

Publikováno v: JOM
Armstrong, M R, Radousky, H B, Austin, R A, Stavrou, E, Zong, H, Ackland, G J, Brown, S, Crowhurst, J C, Gleason, A E, Granados, E, Grivickas, P, Holtgrewe, N, Lee, H J, Li, T T, Lobanov, S, McKeown, J T, Nagler, B, Nam, I, Nelson, A J, Prakapenka, V, Prescher, C, Roehling, J D, Teslich, N E, Walter, P, Goncharov, A F & Belof, J L 2021, ' Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction ', JOM, pp. 1-9 . https://doi.org/10.1007/s11837-020-04535-4

As theoretically hypothesized for several decades in group IV transition metals, we have discovered a dynamically stabilized body-centered cubic (bcc) intermediate state in Zr under uniaxial loading at sub-nanosecond timescales. Under ultrafast shock

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b29faf34b90aaffa6317ba21b42b6268
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005410