Bulletin of the American Physical Society
50th Annual Meeting of the Division of Plasma Physics
Volume 53, Number 14
Monday–Friday, November 17–21, 2008; Dallas, Texas
Session FR0: Celebration of Plasma Physics Plenary Presentations II |
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Chair: Jill Dahlburg, Naval Research Laboratory Room: Landmark A/B |
Tuesday, November 18, 2008 8:00AM - 8:36AM |
FR0.00001: Inertial Confinement Fusion: progress through close coupling of theory and experiment Invited Speaker: It has been nearly 50 years since the first approach to Inertial Confinement Fusion (ICF) was discussed and 36 years since the first publication appeared. For DT plasmas, the ignition (Lawson) criterion can be simply stated as (pressure * time) $>$ 10 atmosphere-seconds. In ICF, plasma confinement times are set by the plasma inertia to a few 10's of picoseconds. Therefore, an igniting ICF plasma needs pressures $>$ 100 billion atmospheres. Achieving these extreme conditions requires a temporally precise, intense field (the equivalent of $>$200 TW/cm$^{2})$ that symmetrically ($\sim $1{\%}) drives the fusion target. Over the past three decades the goal of achieving these extreme conditions has led to tremendous advances in plasma physics, computational tools, diagnostics, precision targets, and experimental facilities. Close coupling of simulations and experiments have led the way to a detailed understanding of the requirements for achieving ignition, enabled by driver energies that have gone from kilojoules to Megajoules and simulations that will soon exceed a Petaflop. ICF research in the United States is entering an exciting new phase with the recent completion of the Sandia Z-Refurbishment Project and the LLE Omega Extended Performance Project. The LLNL National Ignition Facility (NIF) Project will be completed in 2009, and the National Ignition Campaign (NIC) will perform the first ignition attempts on the NIF soon thereafter. This talk will briefly review highlights of the history of ICF with particular attention to the close coupling of theory and experiment, which has been a hallmark of ICF research. [Preview Abstract] |
Tuesday, November 18, 2008 8:36AM - 9:12AM |
FR0.00002: Predictability in Low Temperature Plasmas: From Laboratory to Technology Invited Speaker: Low temperature plasmas (LTPs) have a rich history of quickly transitioning advances in science to augmenting and enhancing technology development. These activities often and ideally occur in parallel - researchers developing theories, models and diagnostics to improve our understanding of basic processes while developing plasma devices in real time. This parallel nature of advancing the science and technology of LTPs has placed extreme value on predictability. How can fundamental processes be captured in theory, models and scaling laws, predict the performance of plasma based devices and speed their development? This emphasis on predictability transcends the history of LTPs; and particularly so in the past 50 years as the ability to apply computations and advanced diagnostics to predictability have improved. For example, early theories of Langmuir probes and positive column discharges were intended to improve lamps. The development of multi-term expansions of Boltzmann's equation for electron energy distributions was intended to enhance development of gas discharge lasers. Quantifying stochastic heating in radio frequency discharges was motivated by and applied to optimizing plasma etching. In this talk the path towards predictability in LTPs and its leveraging in technology development over the past 50 years will be highlighted with emphasis on the development of models and diagnostics. Examples will be drawn from plasma lighting, lasers and materials processing. [Preview Abstract] |
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