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Accueil > Agenda Scientifique

11 octobre 2018: 1 événement

séminaire

  • Atomic processes in dense plasmas

    Jeudi 11 octobre 11:00-12:00 - H.-K. Chung - Gwangju Institute of Science and Technology, Gwangju, Republic of Korea

    Atomic processes in dense plasmas

    Résumé : High energy density physics is one of the “hottest” and most rapidly developing basic scientific disciplines. The physics is interfaced between Plasma physics, Nonlinear optics, Physics of lasers and charged-particle beams, Relativistic physics, Condensed-matter physics, Nuclear, Atomic and Molecular physics, Radiative, gas and magnetic hydrodynamics, Astrophysics. It is the study of the thermodynamic, structural, gas-dynamic, optical, electro-physical and transport properties of matter under extreme conditions.
    In recent years, new regimes of matter under extreme conditions have been created with large plasma generation devices, such as NIF (National Ignition Facility), high power short pulse lasers, X-ray free electron lasers (XFEL) and Z machines. New states of matter have been created over a wide range of plasma conditions : hotter and denser, highly transient, warm dense, or astronomically high x-ray photoionized plasmas. The new state of matter requires new theories and modelling capabilities. In terms of diagnostics, plasma spectroscopy has been applied to understand the new states of matter.
    To understand atomic processes in dense plasmas, a generalized model has been developed over a decade to provide experimentalists fast and simple but reasonable predictions of atomic properties of plasmas. For a given plasma condition, it provides charge state distributions and spectroscopic properties, which have been extensively used for experimental design and data analysis. It has been applied to a wide range of plasma conditions relevant to long or short-pulse laser-produced plasmas, tokamak plasmas, or astrophysical plasmas. The model is currently available through NIST web site (http://nlte.nist.gov/FLY) for more than 1000 users.
    An overview of high energy density physics will be given, and atomic processes in dense plasmas are described.

    Lieu : service 322, campus Saint-Jérôme

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