Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Fesseha Mariam"'
Autor:
Michelle A. Espy, James Sinnis, Frank E. Merrill, Dale Tupa, Carl A. Wilde, Fesseha Mariam, Rachel B. Sidebottom, Ethan F. Aulwes, Levi P. Neukirch, Matthew S. Freeman, Zhaowen Tang, Per E. Magnelind, Brittany A. Broder, Jason Allison, Tamsen Schurman, J. L. Tybo
Publikováno v:
J Med Imaging (Bellingham)
Purpose: Proton radiography may guide proton therapy cancer treatments with beam’s-eye-view anatomical images and a proton-based estimation of proton stopping power. However, without contrast enhancement, proton radiography will not be able to dist
Autor:
Peter J. Turchi, J. C. Lamar, A. R. Patten, William A. Reass, Alexander Saunders, Zhaowen Tang, F. Fierro, T. C. Carney, Sky Sjue, Christopher L. Rousculp, David Fredenburg, Levi P. Neukirch, P. M. Donovan, T. J. Voorhees, Fesseha Mariam, Robert E. Reinovsky, Matthew S. Freeman, Jeffrey R Griego, David M. Oro, Randall B. Randolph, J. T. Bradley
Publikováno v:
SHOCK COMPRESSION OF CONDENSED MATTER - 2019: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter.
Three continuum compaction models are calibrated to planar impact data for CeO2 powder and used to predict the shock compaction behavior of CeO2 powder under cylindrically converging shock wave loading. All experiments and computations are performed
Autor:
David M. Oro, Fesseha Mariam, Wendy Vogan-McNeil, Derek Schmidt, Mark A. Kenamond, Dale Tupa, Miles A. Buechler, Nicholas Denissen, J. B. Stone, William T. Buttler, Michael B. Prime, J. I. Martinez
Publikováno v:
Journal of Dynamic Behavior of Materials. 3:189-202
Recently, Richtmyer–Meshkov Instabilities (RMI) have been proposed for studying the average strength at strain rates up to at least 107/s. RMI experiments involve shocking a metal interface that has initial sinusoidal perturbations. The perturbatio
Autor:
William A. Reass, F. Fierro, Zhaowen Tang, T. J. Voorhees, J.T. Dunwoody, P. M. Donovan, Peter J. Turchi, Sky Sjue, Matthew S. Freeman, Levi P. Neukirch, A. R. Patten, Robert E. Reinovsky, Jeffrey R Griego, David M. Oro, J. C. Lamar, David Fredenburg, Fesseha Mariam, Christopher L. Rousculp, J. T. Bradley, Randall B. Randolph, Alexander Saunders
Publikováno v:
2019 IEEE Pulsed Power & Plasma Science (PPPS).
The PHELIX portable pulsed power driver has recently completed a set of experiments examining the response of granular material to convergent shock loading. Here a nearly 4 MA peak current is delivered to a Z-pinch load with a quarter wave cycle time
Autor:
Mary M. Sandstrom, Brady Aydelotte, J. Medina, Wendy Vogan-McNeil, Levi P. Neukirch, Amy Tainter, Brian J. Hollander, John A. Wright, Brian Jensen, Dale Tupa, Michael Martinez, Carl Wilde, Michael C. Golt, Fesseha Mariam, Julian Lopez, Tamsen Schurmann, Brian E. Schuster, Zhaowen Tang, Jason Allison, Alexander Saunders, Christopher Morris, Adam Pacheco, J. J. Goett, J. L. Tybo, Matthew S. Freeman, Frank Cherne
Publikováno v:
Dynamic Behavior of Materials, Volume 1 ISBN: 9783319950884
Ceramics are important materials due to their high strength and hardness, particularly in armor systems such as personnel body armor where they are used extensively. Understanding the failure process for these types of systems is key to improving the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23583a6cf279791aec311437fa16751f
https://doi.org/10.1007/978-3-319-95089-1_22
https://doi.org/10.1007/978-3-319-95089-1_22
Autor:
Frans Trouw, Jason Allison, Bryan Henson, Christopher Morris, Kathy Prestridge, Dale Tupa, Amy Tainter, Levi P. Neukirch, D. Cardon, R. Uliano, J. L. Tybo, Dennis K. Remelius, Zhaowen Tang, W. Z. Meijer, Mary M. Sandstrom, Tamsen Schurman, Natalya Suvorova, Alexander Saunders, Matthew S. Freeman, Pamela Bowlan, Fesseha Mariam, Laura Smilowitz
Publikováno v:
Journal of Applied Physics. 128:215901
Exploding bridgewire detonators are an industry standard technology used for over 75 years and valued for their precise timing and safety characteristics. Despite widespread use, their functional mechanism remains controversial with both shock and no
Autor:
Frans Trouw, Rachel B. Sidebottom, B. A. Broder, Christopher Morris, Levi P. Neukirch, J. Medina, Tamsen Schurman, W. Z. Meijer, Amy Tainter, L. I. Martinez, Frank E. Merrill, Dale Tupa, Michelle A. Espy, Per E. Magnelind, Carl Wilde, M. G. Davis, Kathy Prestridge, Zhaowen Tang, Alexander Saunders, Jason Allison, Fesseha Mariam, Matthew S. Freeman, Ethan F. Aulwes, J. L. Tybo
Publikováno v:
Applied Physics Letters. 117:144103
A pre- and post-collimation scheme has been applied to high energy proton radiography to establish a dark field condition, which defaults to a state of no transmission until a scatterer is placed at the object plane. This technique, dark field proton
Autor:
Jason C. Cooley, Guillermo Terrones, Paul J. Gibbs, Carl B. Agee, T. Bernert, Michael B. Zellner, Kris Kwiatkowski, Christopher Morris, Darrin D. Byler, Seth D. Imhoff, Amy J. Clarke, C. F. Chen, Dale Tupa, C. T. Olinger, Frank E. Merrill, Eric Brown, M. M. Murray, Alexander Saunders, Paul Nedrow, Frans Trouw, William T. Buttler, Mark A.M. Bourke, Michael W. Burkett, Fesseha Mariam, Zhehui Wang, R. H. Jones, Björn Winkler, W. Vogan, David M. Oro
Publikováno v:
Experimental Mechanics. 56:111-120
An application of nuclear physics, a facility for using protons for flash radiography, has been developed at the Los Alamos Neutron Science Center (LANSCE). Protons have proven far superior to high energy x-rays for flash radiography because of their
Autor:
Sky Sjue, Levi P. Neukirch, Matthew S. Freeman, William A. Reass, Fesseha Mariam, Jeffrey R Griego, Zhaowen Tang, J. T. Bradley, Randall B. Randolph, David M. Oro, A. R. Patten, David Fredenburg, Robert E. Reinovsky, Peter J. Turchi, J. C. Lamar, P. M. Donovan, F. Fierro, T. J. Voorhees, Christopher L. Rousculp, J.T. Dunwoody, Alexander Saunders
Publikováno v:
2018 16th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS).
Shock compression of granular ceria (CeO 2 ) was studied in converging cylindrical geometry using LANL proton radiography, and driven by the Precision High Energy-Density Liner Implosion Experiment (PHELIX) magnetic implosion system. PHELIX delivered
Autor:
Dale Tupa, Matthew S. Freeman, Frank E. Merrill, Per E. Magnelind, Fesseha Mariam, Michelle A. Espy, Carl Wilde
Publikováno v:
Medical Imaging 2018: Physics of Medical Imaging.
Proton beam radiation therapy is at the forefront of modern techniques for cancer treatment, due to its high level of radiation-dose deposition accuracy. This treatment accuracy, however, is limited by the ability to position the treatment beam withi