Homayoun Karimabadi

2020

S. Peter Gary, Riddhi Bandyopadhyay, Ramiz A. Qudsi, William H. Matthaeus, Bennett A. Maruca, Tulasi N. Parashar, and Vadim Roytershteyn (2020): Particle-in-cell Simulations of Decaying Plasma Turbulence: Linear Instabilities versus Nonlinear Processes in 3D and 2.5D Approximations, Astrophysical Journal, The American Astronomical Society, Vol 901, Num 2, pp160

2018

Tulasi N. Parashar, Alexandros Chasapis, Riddhi Bandyopadhyay, Rohit Chhiber, W. H. Matthaeus, B. Maruca, M. A. Shay, J. L. Burch, T. E. Moore, B. L. Giles, D. J. Gershman, C. J. Pollock, R. B. Torbert, C. T. Russell, R. J. Strangeway, and Vadim Roytershteyn (2018): Kinetic Range Spectral Features of Cross Helicity Using the Magnetospheric Multiscale Spacecraft, Physical Review Letters, American Physical Society, Vol 121, Num 26, pp265101

2016

M. Wan, W. H. Matthaeus, V. Roytershteyn, T. N. Parashar, P. Wu, and H. Karimabadi (2016): Intermittency, coherent structures and dissipation in plasma turbulence, Physics of Plasmas, AIP Publishing LLC., Vol 23, Num 4, pp042307
Kai Germaschewski, William Fox, Stephen Abbott, Narges Ahmadi, Kristofor Maynard, Liang Wang, Hartmut Ruhl, and Amitava Bhattacharjee (2016): The Plasma Simulation Code: A Modern Particle-in-Cell Code with Patch-Based Load-Balancing, Journal of Computational Physics, Elsevier BV, Vol 318, pp305-326

2015

Fan Guo, Yi-Hsin Liu, William Daughton, and Hui Li (2015): Particle Acceleration and Plasma Dynamics During Magnetic Reconnection in the Magnetically-Dominated Regime, Astrophysical Journal, The American Astronomical Society, Vol 806, Num 2, pp167
K. D. Makwana, V. Zhdankin, H. Li, W. Daughton, and F. Cattaneo (2015): Energy Dynamics and Current Sheet Structure in Fluid and Kinetic Simulations of Decaying Magnetohydrodynamic Turbulence, Physics of Plasmas, AIP Publishing, Vol 22, Num 4, pp042902
M. Wan, W. H. Matthaeus, V. Roytershteyn, H. Karimabadi, T. Parashar, P. Wu, and M. Shay (2015): Intermittent Dissipation and Heating in 3D Kinetic Plasma Turbulence, Physical Review Letters, American Physical Society, Vol 114, Num 17, pp175002
V. Roytershteyn, H. Karimabadi, and A. Roberts (2015): Generation of Magnetic Holes in Fully Kinetic Simulations of Collisionless Turbulence, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, The Royal Society, Vol 373, Num 2041, pp20140151-20140151

2014

Fan Guo, Hui Li, William Daughton, and Yi-Hsin Liu (2014): Formation of Hard Power Laws in the Energetic Particle Spectra Resulting from Relativistic Magnetic Reconnection, Physical Review Letters, American Physical Society, Vol 113, Num 15, pp155005
J. Jara-Almonte, W. Daughton, and H. Ji (2014): Debye Scale Turbulence Within the Electron Diffusion Layer During Magnetic Reconnection, Physics of Plasmas, AIP Publishing, Vol 21, Num 3, pp032114
W. H. Matthaeus, S. Oughton, K. T. Osman, S. Servidio, M. Wan, S. P. Gary, M. A. Shay, F. Valentini, V. Roytershteyn, H. Karimabadi, and S. C. Chapman (2014): Nonlinear and Linear Timescales Near Kinetic Scales in Solar Wind Turbulence, Astrophysical Journal, The American Astronomical Society, Vol 790, Num 2, pp155
Yi-Hsin Liu, Joachim Birn, William Daughton, Michael Hesse, and Karl Schindler (2014): Onset of Reconnection in the Near Magnetotail: PIC Simulations, Journal of Geophysical Research: Space Physics, Wiley-Blackwell, Vol 119, Num 12, pp9773-9789
H. Karimabadi, V. Roytershteyn, H. X. Vu, Y. A. Omelchenko, J. Scudder, W. Daughton, A. Dimmock. K. Nykyri, M. Wan, D. Sibeck, M. Tatineni, A. Majumdar, B. Loring, and B. Geveci (2014): The link between shocks, turbulence, and magnetic reconnection in collisionless plasmas, Physics of Plasmas, AIP Publishing, Vol 21, Num 6, pp062308

2013

Yi-Hsin Liu, W. Daughton, H. Karimabadi, H. Li, and V. Roytershteyn (2013): Bifurcated Structure of the Electron Diffusion Region in Three-Dimensional Magnetic Reconnection, Physical Review Letters, American Physical Society, Vol 110, Num 26, pp265004

2011

H. Karimabadi, B. Loring, H. X. Vu, Y. Omelchenko, M. Tatineni, A. Majumdar, U. Ayachit and B. Geveci (2011): Petascale Global Kinetic Simulations of The Magnetosphere and Visualization Strategies for Analysis of Very Large Multi-Variate Data Sets, Astronomical Society of the Pacific, ASP Conference Series: 5th international conference of numerical modeling of space plasma flows (ASTRONUM 2010), Vol 444, pp281, San Diego, California, U.S.A.
H. Karimabadi, J. Dorelli, V. Roytershteyn, W. Daughton, and L. Chacón (2011): Flux Pileup in Collisionless Magnetic Reconnection: Bursty Interaction of Large Flux Ropes, Physical Review Letters, American Physical Society, Vol 107, Num 2, pp025002
H. Karimabadi, V. Roytershteyn, C.G. Mouikis, L.M. Kistler, and W. Daughton (2011): Flushing Effect in Reconnection: Effects of Minority Species of Oxygen Ions, Planetary and Space Science, Elsevier BV, Vol 59, Num 7, pp526-536

2010

H. Karimabadi, J. Dorelli, H. X. Vu, B. Loring, Y. Omelchenko, Dimitris Vassiliadis, Shing F. Fung, Xi Shao, Ioannis A. Daglis, and Joseph D. Huba (2010): Is Quadrupole Structure of Out-of-Plane Magnetic Field Evidence for Hall Reconnection?, AIP Publishing, AIP Conference Proceedings (Modern Challenges in Nonlinear Plasma Physics: A Festschrift Honoring the Career of Dennis Papadopoulos), Vol 1320, pp137-143, Halkidiki, Greece

2015

Homayoun Karimabadi (2015): Enabling Breakthrough Kinetic Simulations of the Magnetosphere, 2015 Blue Waters Annual Report, pp18-20

Shahaboddin Alahyari Beig and E. Johnsen: Inertial collapse of bubble pairs near a solid surface


70th Annual Meeting of the APS Division of Fluid Dynamics; Denver, Colorado, Nov 20, 2017

‘Solar Superstorms’ invited to show at SIGGRAPH 2016


Jul 8, 2016

The Advanced Visualization Lab at the National Center for Supercomputing Applications at Illinois was recently invited to present its recent film “Solar Superstorms” at the 2016 SIGGRAPH Conference. This conference will be the 43rd annual international conference and exhibition on computer graphics and interactive techniques, and will take place July 24-28 in Anaheim, California.


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Scientific visualizations heat up new documentary that helps explain sun’s strange phenomena


May 20, 2016

The National Science Foundation (NSF), the supercomputer company Cray Inc., and Sens. Bill Nelson of Florida and Gary Peters of Michigan invite members of the media to attend a special screening of the documentary "Solar Superstorms" May 25 at the Russell Senate Office Building in Washington, D.C. High-velocity jets, fiery tsunamis that reach up to 100,000 kilometers and rising loops of electrified gas -- NSF and Cray Inc. ask what's driving these strange phenomena that take place on the sun and how might they affect planet Earth? Without question, these occurrences are beautiful, but every year, they cost the United States billions of dollars.


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Journey Into The Sun's Guts With Benedict Cumberbatch As Your Guide


Jul 1, 2015

Without the sun, life on Earth would be impossible. It provides food for the plants that feed us, and warmth so that we don’t freeze to death. But the sun has a dark side. It is, after all, a giant ball of fire in the sky, whose 27 million degree Fahrenheit surface is tossed about by burning tsunami waves 62,000 miles high. And at pretty much any point, it could burp out rivers of charged particles that could paralyze technology on Earth. A new documentary premiering tonight asks the question, “What can cause our normally benign sun to erupt in such fury that it can threaten the world's power and technological infrastructure?" according to a press release.


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Solar Superstorms show Highlights Extremely Powerful Computer Simulation, Visualization


Jul 1, 2015

A 24-minute, high-resolution science documentary narrated Benedict Cumberbatch about the dynamics of the sun that features data-driven visualizations produced by the National Center for Supercomputing Applications (NCSA) at the University of Illinois at Urbana-Champaign debuted on June 30, 2015, at the Louisiana Art & Science Museum in Baton Rouge before rolling out to more than a dozen planetariums and science centers around the world. "Solar Superstorms" was produced as part of a project called CADENS (Centrality of Digitally Enabled Science). Supported by a grant from the National Science Foundation (NSF), CADENS spotlights the new knowledge produced thanks to the massive computing and data analysis capabilities now available to scientists, engineers and scholars.


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Computational science and data visualization take the spotlight in new Solar Superstorms documentary


Jun 29, 2015

A 24-minute, high-resolution science documentary about the dynamics of the Sun that features data-driven visualizations produced by the National Center for Supercomputing Applications (NCSA) at the University of Illinois at Urbana-Champaign will debut June 30 at the Louisiana Art & Science Museum in Baton Rouge before rolling out to more than a dozen planetariums and science centers around the world. "Solar Superstorms” was produced as part of a project called CADENS (Centrality of Advanced Digitally Enabled Science). Supported by a grant from the National Science Foundation, CADENS spotlights the new knowledge produced thanks to the massive computing and data analysis capabilities now available to scientists, engineers, and scholars.


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So much detail


Jul 9, 2013

The sun is the key to life-sustaining functions here on Earth. It provides energy for photosynthesis and serves as a driving force behind climate and weather patterns, among other things. This star is both literally and figuratively the center of our solar system, so it should also come as no surprise that it affects our lives in ways we never expected. “The Earth is embedded in the Sun’s extended atmosphere. As a result, the Earth and its technological systems are in constant threat from magnetic storms on the Sun. While most of these storms are not directed towards the Earth, the results can be devastating if a massive storm happens to be directed at the Earth,” says Homa Karimabadi, space physics group leader at the University of California, San Diego and chief scientist at SciberQuest, Inc.


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4 applications sustain 1 petaflop on Blue Waters


Jan 29, 2013

Four large-scale science applications (VPIC, PPM, QMCPACK and SPECFEM3DGLOBE) have sustained performance of 1 petaflop or more on the Blue Waters supercomputer, and the Weather Research & Forecasting (WRF) run on Blue Waters is the largest WRF simulation ever documented. These applications are part of the NCSA Blue Waters Sustained Petascale Performance (SPP) suite and represent valid scientific workloads. VPIC VPIC integrates the relativistic Maxwell-Boltzmann system in a linear background medium for multiple particle species, in time with an explicit-implicit mixture of velocity Verlet, leapfrog, Boris rotation and exponential differencing based on a reversible phase-space volume conserving second order Trotter factorization. The Petascale Computing Resource Allocation (PRAC) team led by Homayoun Karimabadi (University of California-San Diego) is using VPIC in for kinetic simulations of magnetic reconnection of high temperature plasmas (H+ and e-).


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Understanding space weather with Blue Waters


Apr 17, 2012

Homayoun Karimabadi from the University of California-San Diego explains how his team is using the Blue Waters Early Science System to investigate magnetic reconnection, which triggers storms on the sun and allows the sun's radiation to enter Earth's magnetosphere.


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6 science teams begin using Blue Waters Early Science System


Mar 20, 2012

Six research teams have begun using the first phase of the Blue Waters sustained-petascale supercomputer to study some of the most challenging problems in science and engineering, from supernovae to climate change to the molecular mechanism of HIV infection. The Blue Waters Early Science System, which is made up of 48 Cray XE6 cabinets, represents about 15 percent of the total Blue Waters computational system and is currently the most powerful computing resource available through the National Science Foundation.


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