Bulletin of the American Physical Society
2007 APS April Meeting
Volume 52, Number 3
Saturday–Tuesday, April 14–17, 2007; Jacksonville, Florida
Session K3: Extreme Plasma Phenomena |
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Sponsoring Units: DPP DNP Chair: Amitava Bhatacharjee, University of New Hampshire Room: Hyatt Regency Jacksonville Riverfront Grand 2 |
Sunday, April 15, 2007 1:15PM - 1:51PM |
K3.00001: Strongly coupled Quark-Gluon Plasma and its modeling via Molecular Dynamics Invited Speaker: The talk starts with a brief discussion of the differences between electromagnetic and Non-Abelian plasma, which include non-constant (``rotating") color charges and magnetically charged quasiparticles - monopoles and dyons. We then summarize experimental evidences for strongly coupled regime, from RHIC experiments on heavy ion collisions. Two transport observables -- the diffusion constant and viscosity -- will be discussed specifically. The settings of MD simulations and its first results on these transport properties be presented as a summary. If time permits, we will also compare them to the analytical results recently obtained using string theory methods, via the so called AdS/CFT correspondence. [Preview Abstract] |
Sunday, April 15, 2007 1:51PM - 2:27PM |
K3.00002: Exotic Behavior of Extremely Dense Plasmas: Phase Transitions, Kilovolt Chemistry, and Fusion Invited Speaker: A new generation of materials experiments at high pressures and densities is now underway thanks to a variety of high energy density (HED) facilities and new compression techniques. Dynamic compression experiments can now probe materials from kilobar to gigabar pressures with timescales ranging from picoseconds to microseconds. Recent shock experiments have measured the insulator-conductor (IC) transition and the high-pressure equation of state of several low Z materials (C, H$_{2}$O, SiO$_{2}$,H$_{2}$,He) from kilobar to 10's of Mbar. The IC transition is sometimes coincident with melting (diamond), a change in chemistry (H$_{2}$, SiO$_{2})$ or thermal activation of carriers across a reduced band gap (He, H$_{2}$O). Melt curves at ultra-high pressures are often complex. For example, diamond is found melt to a liquid metal above 6 Mbar and have a negative Clausius slope between 6 and 10 Mbar. In the high pressure and partially ionized fluid, complex chemistry plays a key role in the thermodynamics. In addition to shock compression, ramp compression experiments are exploring ``low'' temperature and high-pressure multi-phase diagrams and phase transition kinetics. Over the next few years these new capabilities will allow us to understand fundamental questions in high pressure science including, what is nature of solids at 10's of Mbar, what chemistry occurs in the Gbar regime, and what is the nature of He and H$_{2}$ in the deep interior of Giant planets and low mass stars. [Preview Abstract] |
Sunday, April 15, 2007 2:27PM - 3:03PM |
K3.00003: Magnetically dominated plasma in astrophysics Invited Speaker: In astrophysical plasmas energy density of magnetic field may exceed plasma energy density (including rest mass). I will discuss basic dynamic and dissipative properties of such plasmas and outline their astrophysical applications focusing on a class of strongly magnetized neutron stars -- magnetars. [Preview Abstract] |
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