Joseph Michael Smidt

Los Alamos National Laboratory

Journal article Open access Peer reviewed

Evaluation of the relative importance of preheat from hohlraum x rays and a radiative shock on a low-density foam

by Yong Ho Kim, Carlos Di Stefano, Pawel Marek Kozlowski, Brian Michael Haines, Thomas Joseph Murphy, Mark A. Gunderson, Thomas H. Day, M. Brophy, Richard Edward Olson and M. R. Douglas ... (14 authors)

Published 11/2023

Physics of Plasmas, 30, 11, 112701

Journal article Open access Peer reviewed

Influence of mass ablation on ignition and burn propagation in layered fusion capsules

by William Scott Daughton, Brian James Albright, Sean Michael Finnegan, Brian Michael Haines, John L. Kline, Joshua Paul Sauppe and Joseph Michael Smidt

Published 01/2023

Physics of Plasmas, 30, 1, 12704

Journal article Open access Peer reviewed

A mechanism for reduced compression in indirectly driven layered capsule implosions

by Brian Michael Haines, Joshua Paul Sauppe, Brian James Albright, William Scott Daughton, Sean Michael Finnegan, John L. Kline and Joseph Michael Smidt

Published 04/2022

Physics of Plasmas, 29, 4, 42704

Journal article Peer reviewed

Experimental quantification of the impact of heterogeneous mix on thermonuclear burn

by B. J. Albright, T. J. Murphy, B. M. Haines, M. R. Douglas, J. H. Cooley, T. H. Day, N. A. Denissen, C. Di Stefano, P. Donovan and S. L. Edwards ... (37 authors)

Published 02/01/2022

Physics of plasmas, 29, 2, 022702

Journal article Open access Peer reviewed

Results from single-shock Marble experiments studying thermonuclear burn in the presence of heterogeneous mix on the National Ignition Facility

by Thomas Joseph Murphy, Brian James Albright, Melissa Rae Douglas, Tana Cardenas, James Hamilton Cooley, Thomas H. Day, Nicholas Allen Denissen, Robert Allen Gore, Mark A. Gunderson and Jeffrey Robert Haack ... (23 authors)

Published 03/2021

High Energy Density Physics, 38, 100929

Journal article Open access Peer reviewed

Experimental validation of shock propagation through a foam with engineered macro-pores

by Yong Ho Kim, Thomas Joseph Murphy, Pawel Marek Kozlowski, Lauren Maranne Green, Brian Michael Haines, Thomas H. Day, Tana Morrow, Douglas Nelson (Doug) Woods, Joseph Michael Smidt and Melissa Rae Douglas ... (15 authors)

Published 01/2021

Physics of Plasmas, 28, 1, 012702

Journal article Open access Peer reviewed

First observation of increased DT yield over prediction due to addition of hydrogen

by Yong Ho Kim, Hans W. Herrmann, Nelson M. Hoffman, Mark J. Schmitt, Grigory Kagan, A. M. McEvoy, A. Zylstra, Joseph Michael Smidt, S. Gales and A. Leatherland ... (15 authors)

Published 01/2021

Physics of Plasmas, 28, 1, 012707

Journal article Open access

Observation of persistent species temperature separation in inertial confinement fusion mixtures

by Brian Michael Haines, Rahul C Shah, Joseph Michael Smidt, Brian James Albright, Tana Cardenas, Melissa Rae Douglas, Chad Forrest, Vladimir Yu Glebov, Mark A. Gunderson and Christopher Eric Hamilton ... (19 authors)

Published 12/2020

Nature Communications, 11, 1, 544

Journal article Open access Peer reviewed

The rate of development of atomic mixing and temperature equilibration in inertial confinement fusion implosions

by Brian Michael Haines, R. C. Shah, Joseph Michael Smidt, Brian James Albright, Tana Cardenas, Melissa Rae Douglas, C. Forrest, V. Yu. Glebov, Mark A. Gunderson and Christopher Eric Hamilton ... (19 authors)

Published 10/2020

Physics of Plasmas, 27, 10, 102701

Journal article Open access Peer reviewed

Outflows from inflows: the nature of Bondi-like accretion

by Tim Waters, Aycin Aykutalp, Daniel Proga, Jarrett Johnson, Hui Li and Joseph Smidt

Published 01/01/2020

Monthly notices of the Royal Astronomical Society, 491, 1, L76 - L80

The classic Bondi solution remains a common starting point both for studying black hole growth across cosmic time in cosmological simulations and for smaller scale simulations of active galactic nuclei (AGN) feedback. In nature, however, there will be inhomogeneous distributions of rotational velocity and density along the outer radius (R-o) marking the sphere of influence of a black hole. While there have been many studies of how the Bondi solution changes with a prescribed angular momentum boundary condition, they have all assumed a constant density at R-o. In this Letter, we show that a non-uniform density at R-o causes a meridional flow and due to conservation of angular momentum, the Bondi solution qualitatively changes into an inflow-outflow solution. Using physical arguments, we analytically identify the critical logarithmic density gradient vertical bar partial derivative ln rho/partial derivative theta vertical bar above which this change of the solution occurs. For realistic R-o, this critical gradient is less than 0.01 and tends to 0 as R-o -> infinity. We show using numerical simulations that, unlike for solutions with an imposed rotational velocity, the accretion rate for solutions under an inhomogeneous density boundary condition remains constant at nearly the Bondi rate (M) over dot(B), while the outflow rate can greatly exceed (M) over dot(B).

Joseph Michael Smidt

Los Alamos National Laboratory

Output list