Publications

Lefevre, H.J., Huegel, I., Kelso, K., Nagayama, T., Loisel, G.P., Bailey, J.E., Klein, S., Jaar, G., Swanson, K., Dunlap, B., Cho, P., Mayes, D., Mancini, R., Winget, D., Davis, J., Gray, W., Drake, R., Kuranz, C., & Kuranz, C. (2024). Laboratory Generated Photoionization Fronts Relevant to Astrophysics [Conference Presenation]. 10.2172/2585119

Foulk, J.W., Schaeuble, M.A., Nagayama, T., Hansen, S.B., & Hansen, S.B. (2024). Developing a Generalized NLTE Spectral ML Model for HED Applications [Conference Poster]. 10.2172/2563934

Hansen, S.B., Heeter, R., Johns, H., Nagayama, T., Loisel, G.P., Bailey, J.E., & Bailey, J.E. (2023). Milestone 7720: National Opacity Program - Tri-Lab Assessment of Measurements and Models. 10.2172/2430172

Foulk, J.W., Knapp, P.F., Beckwith, K., Evstatiev, E.G., Fein, J.R., Jennings, C.A., Joseph, R., Klein, B., Maupin, K.A., Nagayama, T., Patel, R., Schaeuble, M.A., Vasey, G., Ampleford, D.J., & Ampleford, D.J. (2023). Developing and applying quantifiable metrics for diagnostic and experiment design on Z. 10.2172/2335899

Nagayama, T., Springstead, M.P., & Springstead, M.P. (2023). Photoionization Fronts Experiment on the Z-Machine [Conference Presenation]. 10.2172/2584824

Nagayama, T. (2023). Challenges in analyzing recent opacity data: Non-uniform areal density [Conference Presenation]. 10.2172/2584826

Nagayama, T., Dunlap, B.H., & Dunlap, B.H. (2023). White dwarf photosphere experiment [Conference Presenation]. 10.2172/2584827

Nagayama, T. (2023). Atomic and radiation physics for HED x-ray spectroscopy [Conference Presenation]. 10.2172/2430663

Schaeuble, M.A., Foulk, J.W., Hansen, S.B., Nagayama, T., & Nagayama, T. (2023). Developing a machine learning based spectral analysis tool to understand Argon gas puff implosion dynamics on Z [Conference Presenation]. 10.2172/2431063

Nagayama, T., Bailey, J.E., Loisel, G.P., Dunham, G.S., Mayes, D., & Mayes, D. (2023). Updates on iron opacity measurements at solar interior temperature [Conference Presenation]. 10.2172/2431295

Nagayama, T. (2022). Updates on iron opacity measurements at solar interior temperature [Conference Presenation]. 10.2172/2006155

Mayes, D., Nagayama, T., Bailey, J.E., Loisel, G.P., & Loisel, G.P. (2022). Oxygen opacity experiments to advance our understanding of stellar interiors [Conference Presenation]. 10.2172/2006174

Nagayama, T. (2022). Revisiting iron opacity measurements at solar interior temperature [Conference Presenation]. 10.2172/2005632

Hansen, S.B., Baczewski, A.D., Gomez, T., Hentschel, T.W., Jennings, C.A., Kononov, A., Nagayama, T., Adler, K., Cangi, A., Cochrane, K., Foulk, J.W., Schleife, A., & Schleife, A. (2022). Improving Predictive Capability in REHEDS Simulations with Fast, Accurate, and Consistent Non-Equilibrium Material Properties. 10.2172/1890268

Nagayama, T. (2022). Oxygen opacity measurements, and challenges in understanding solar Rosseland-mean opacity [Conference Presenation]. 10.2172/2004302

Nagayama, T. (2022). Challenges of HED opacity and its implication on solar/stellar applications [Conference Presenation]. 10.2172/2004270

Nagayama, T. (2022). Z Astrophysical Plasma Properties Collaborations-- Importance and challenges of HED benchmark experiments - [Conference Presenation]. 10.2172/2004274

Knapp, P.F., Glinsky, M.E., Schaeuble, M.A., Jennings, C.A., Evans, M., Gunning, J., Awe, T.J., Chandler, G.A., Geissel, M., Gomez, M.R., Hahn, K.D., Hansen, S.B., Harding, E.C., Harvey-Thompson, A.J., Humane, S., Klein, B., Mangan, M.A., Nagayama, T., Porwitzky, A., … Sinars, D. (2022). Estimation of stagnation performance metrics in magnetized liner inertial fusion experiments using Bayesian data assimilation. Physics of Plasmas, 29(5). 10.1063/5.0087115

Fein, J.R., Harding, E.C., Glinsky, M.E., Knapp, P.F., Nagayama, T., Weis, M.R., & Weis, M.R. (2022). Sparse-view tomographic reconstruction of MagLIF emission volumes using learned basis functions [Conference Poster]. https://www.osti.gov/biblio/2003083

Fein, J.R., Harding, E.C., Glinsky, M.E., Knapp, P.F., Nagayama, T., Weis, M.R., & Weis, M.R. (2022). Sparse-view tomographic reconstruction of MagLIF emission volumes using learned basis functions [Conference Poster]. https://doi.org/10.2172/2003080

Fein, J.R., Harding, E.C., Glinsky, M.E., Knapp, P.F., Nagayama, T., Weis, M.R., & Weis, M.R. (2022). Sparse-view tomographic reconstruction of MagLIF emission volumes using learned basis functions [Conference Presenation]. https://www.osti.gov/biblio/2003085

Gomez, T., Nagayama, T., Cho, P.B., Kilcrease, D.P., Fontes, C.J., Zammit, M.C., & Zammit, M.C. (2022). Introduction to spectral line shape theory. Journal of Physics B: Atomic, Molecular and Optical Physics, 55(3). 10.1088/1361-6455/ac4f31

Springstead, M.P., Lefevre, H., Nagayama, T., Loisel, G.P., Bailey, J.E., Klein, S., Mancini, R.C., Swanson, K., Winget, D.E., Dunlap, B.H., Davis, J., Kuranz, C.C., Drake, R.P., & Drake, R.P. (2022). Laboratory Generated Photoionization Fronts Relevant to Cosmology [Conference Poster]. 10.2172/2001750

Gomez, T., Nagayama, T., Cho, P.B., Zammit, M.C., Fontes, C.J., Kilcrease, D.P., Bray, I., Hubeny, I., Dunlap, B.H., Foulk, J.W., Winget, D.E., & Winget, D.E. (2021). All-Order Full-Coulomb Quantum Spectral Line-Shape Calculations. Physical Review Letters, 127(23). 10.1103/physrevlett.127.235001

Nagayama, T. (2021). Re-analysis of plasma temperature and density for stellar iron opacity experiments [Conference Presenation]. 10.2172/1899263

Gomez, T., Nagayama, T., Zammit, M., Fontes, C., Kilcrease, D., Cho, P.B., Dunlap, B.H., Foulk, J.W., Winget, D.E., Bray, I., Hubeny, I., & Hubeny, I. (2021). All-Order Full-Coulomb Quantum Spectral Line-Shape Calculations [Conference Presenation]. 10.2172/1891596

Nagayama, T. (2021). Stellar opacity experiments [Conference Presenation]. 10.2172/1893294

Nagayama, T. (2021). Solar convection-zone-base problem and laboratory stellar-opacity measurements [Conference Presenation]. 10.2172/1888134

Nagayama, T. (2021). Temperature and density analysis and their uncertainties [Conference Presenation]. 10.2172/1888436

Nagayama, T. (2021). Time-resolved measurements with preheat shield to reach higher-density [Conference Presenation]. 10.2172/1881692

Nagayama, T. (2021). Non-focusing x-ray diagnostics modeling for HED experiments [Conference Presenation]. 10.2172/1884421

Nagayama, T. (2021). Laboratory tests of stellar opacity models [Conference Presenation]. 10.2172/1889063

Dunham, G.S., Nagayama, T., Bailey, J.E., Loisel, G.P., & Loisel, G.P. (2021). Background measurement methods for opacity experiments conducted at the Z facility. Review of Scientific Instruments, 92(8). 10.1063/5.0057225

Gomez, T., Nagayama, T., Zammit, M., Fontes, C., Kilcrease, D., Cho, P.B., Dunlap, B.H., Foulk, J.W., Winget, D.E., Bray, I., & Bray, I. (2021). Improved Line-Shape Physics for Plasma Diagnostics [Conference Presenation]. 10.2172/1884232

Dunlap, B.H., Foulk, J.W., Cho, P.B., Hobbs, B., Gomez, T., Schaeuble, M.A., Nagayama, T., Bailey, J.E., Patel, S.G., Dufour, P., Hubeny, I., Winget, D.E., & Winget, D.E. (2021). The White Dwarf Photosphere Experiment: Current Status and Future Directions [Conference Presenation]. 10.2172/1888128

Schaeuble, M.A., Nagayama, T., Bailey, J.E., Dunlap, B.H., Patel, S.G., & Patel, S.G. (2021). Experimental methods for laboratory measurements of helium spectral line broadening in white dwarf photospheres. Physics of Plasmas, 28(6). https://doi.org/10.1063/5.0047931

Nagayama, T. (2021). Experimental Testing of stellar opacity models [Presentation]. https://www.osti.gov/biblio/1844049

Cho, P.B., Loisel, G.P., Bailey, J.E., Nagayama, T., Hansen, S.B., Fontes, C., Foulk, J.W., Winget, D.E., & Winget, D.E. (2020). Spectral Line Identification in Photoionized Silicon Plasma Emission [Conference Poster]. 10.2172/1843326

Nagayama, T. (2020). 2021 Stewardship Science Academic Programs Annual. 10.2172/1718973

Nagayama, T. (2020). Revisiting iron opacity discrepancies at stellar interior conditions [Conference Presenation]. 10.2172/1832724

Dunham, G.S., Nagayama, T., Bailey, J.E., Loisel, G.P., & Loisel, G.P. (2020). Opacity background removal study [Conference Presenation]. 10.2172/1877816

Hansen, S.B., More, R.M., Bailey, J.E., Pain, J., Nagayama, T., & Nagayama, T. (2020). Two-photon processes and stellar opacity [Conference Presenation]. 10.2172/1829954

Harvey-Thompson, A.J., Weis, M.R., Ruiz, D.E., Wei, M., Sefkow, A., Nagayama, T., Campbell, M., Fooks, J., Glinsky, M.E., Peterson, K.J., & Peterson, K.J. (2020). The Effect of LEH Foil Thickness on MagLIF-Relevant Laser Preheat [Conference Presenation]. 10.2172/1831001

Loisel, G.P., Bailey, J.E., Nagayama, T., Dunham, G.S., Gard, P., Rochau, G.A., Colombo, A., Edens, A., Looker, Q.M., Kimmel, M., Stahoviak, J., Porter, J.L., & Porter, J.L. (2020). Z opacity sample evolution using time-resolved spectroscopy with a gated hybrid CMOS detector [Conference Presenation]. 10.2172/1830898

Harvey-Thompson, A.J., Weis, M.R., Ruiz, D.E., Wei, M.S., Sefkow, A.B., Nagayama, T., Campbell, E.M., Fooks, J.A., Glinsky, M.E., Peterson, K.J., & Peterson, K.J. (2020). The effect of laser entrance hole foil thickness on MagLIF-relevant laser preheat. Physics of Plasmas, 27(11). 10.1063/5.0021034

Nagayama, T. (2020). Opacity measurements for stellar interiors [Conference Poster]. https://www.osti.gov/biblio/1812855

Nagayama, T. (2020). Statistical data analysis for Z opacity data [Conference Poster]. https://www.osti.gov/biblio/1812439

Nagayama, T. (2020). Systematic measurements of opacity dependence on temperature density and atomic number at stellar interior conditions [Conference Poster]. https://www.osti.gov/biblio/1807434

Gomez, T., Nagayama, T., Fontes, C.J., Kilcrease, D.P., Hansen, S.B., Zammit, M.C., Fursa, D.V., Kadyrov, A.S., Bray, I., & Bray, I. (2020). Effect of Electron Capture on Spectral Line Broadening in Hot Dense Plasmas. Physical Review Letters, 124(5). 10.1103/PhysRevLett.124.055003

Schaeuble, M.A., Nagayama, T., Bailey, J.E., Gomez, T., Foulk, J.W., Winget, D.E., & Winget, D.E. (2019). Hβ and Hγ Absorption-line Profile Inconsistencies in Laboratory Experiments Performed at White Dwarf Photosphere Conditions. The Astrophysical Journal (Online), 885(1). https://doi.org/10.3847/1538-4357/ab479d