Welcome to the FLASH center
The Flash Center for Computational Science at the University of Chicago is the home of several cross-disciplinary computational research projects, and FLASH, a publicly available multiphysics multiscale simulation code with a wide international user base. Research projects include high-energy density physics and thermonuclear-powered supernovae.
NEWS -- FLASH CENTER LASER EXPERIMENT HERALDED AS ONE OF THE TOP-TEN PHYSICS BREAKTHROUGHS OF 2014
Scientists at the Flash Center for Computational Science, along with colleagues in Europe and the U.S., have been heralded by the UK Institute of Physics for making one of the top-ten physics breakthroughs of 2014. They used one of the world's most powerful lasers to create tiny versions of supernova explosions in the laboratory. The experiment demonstrated the amplification of magnetic fields by turbulence, a mechanism thought to play a role in creating the powerful magnetic fields seen in some remnants of exploding stars, such as Cassiopeia A. SEE HOW THEY DID IT.
The Flash Center’s research in high energy density physics is supported by the U.S. Department of Energy National Nuclear Security Administration.
NEWS -- FLASH CENTER WILL STUDY ORIGIN OF COSMIC MAGNETIC FIELDS USING OMEGA LASER
Magnetic fields are everywhere in the universe, from the Sun and other stars, to galaxies and clusters of galaxies. But the origin of these magnetic fields, and why they are as strong as they are, remain a mystery. Nonlinear amplification of seed magnetic fields by turbulence is a widely invoked explanation for how cosmic magnetic fields become as strong as we observe them to be. But this mechanism – which is called the turbulent dynamo – has never been demonstrated in the laboratory.
Now, an international team of scientists led by the Flash Center for Computational Science has been awarded time at the Omega laser – one of the most powerful lasers in the world – to create a magnetized turbulent plasma and see if the seed magnetic fields are amplified by an enormous amount, as scientists have postulated. To do this, the team will fire intense lasers at two targets, creating two plasma jets that will each flow through a grid and become turbulent. The jets will then collide, making the plasma even more turbulent. The experiment is expected to produce magnetic Reynolds numbers Rm > 1000 – far greater than the value Rm > 200 theorists say is needed for the turbulent dynamo mechanism to work.
The international scientific team that will conduct the experiment includes members from the University of Oxford, UK; the University of Rochester; the Massachusetts Institute of Technology; Lawrence Livermore National Laboratory; ETH Zurich, Switzerland; Ecole Polytechnique, France; and the Ulsan National Institute of Science and Technology, Korea; as well as the Flash Center at the University of Chicago. The experiment at the Omega laser and the Flash Center’s research in high energy density physics are both supported by the U.S. Department of Energy National Nuclear Security Administration.
FLASH HEDP Simulation
FLASH moderate-fidelity simulation of the radiative
shock experiment being conducted by the Center
for Radiative Shock Hydrodynamics (CRASH) at
the University of Michigan.
In the experiment, a laser deposits energy in a thin
Beryllium disk, driving a shock down a plastic
cylinder filled with Xenon gas. In the
simulation, the piston effect of the Be disk is
modeled by shifting to a frame moving with the
velocity of the shock and imposing a
reflection boundary condition at the bottom of
the computational domain. The two images show
the resulting density and temperature of the Xenon gas.
For more about the experiment, see
F. W. Doss et al., Physics of Plasmas, 16, 112705 (2009).