visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-04-19 14:00 
연사  
장소 #1323(E6-2. 1st fl.) 

Nonlocal collisional electron transport in partially ionized plasma generation, structure, and stability

 

Apr. 19(Tue.), 2PM, #1323(E6-2. 1st fl.)
Prof. Mark Koepke, Department of Physics and Astronomy, West Virginia University, USA

 

The local plasma generation, structure, and stability at one location and time can be unexpectedly influenced by “nonlocal” electron transport and heating effects attributed to conditions, processes, and boundaries many energy-relaxation scale lengths away in another part of the plasma. Nonlocal effects are attributed to electric-field sampling by a traversing electron across disparate regional plasma conditions when the electron energy relaxation length is larger than or comparable to the scale length of plasma inhomogeneity. As a result, the entire electric-field profile, including sheaths, striations, and filamentation, rather than the local electric field strength, determines spatiotemporal electron current and heating, even in collisional plasma. Non-equilibrium, nonlocal properties make partially ionized plasma, which is strongly affected also by the presence of neutral species, a solid surface, particulates, or a liquid, a remarkable tool for manufacturing (of semiconductor chips, solar and plasma-display panels, and plasma sources for particle beams), for the treatment of organic and bio-objects/materials, and for nanotechnology. A promising approach for improved control of the local quantities plasma density, electron temperature, and electron and ion energy distribution functions (EEDF, IEDF) exploits the peculiarities of nonlocal effects on these characteristic plasma parameters. Nonlocal collisional electron transport effects are important for understanding and applying atmospheric-pressure plasma jets, micro-discharges, and low pressure plasma discharges not only to the pursuit of the discovery plasma frontier but also to technology used everyday.

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
475 2017-09-26 11:00    Time-resolved ARPES study of Dirac and topological materials
474 2017-10-10 16:00    Discovery of New 2D Materials with Diverse Physical Properties
473 2017-11-03 14:30    Quantum Resistor-Capacitor Circuit with Majorana Edge States file
472 2017-11-03 16:00    Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions file
471 2017-11-08 13:00    “Emergent exotic quasiparticles in quantum spin liquids” file
470 2017-11-28 16:00    Physics after the lab and the desk: Your work in PRL file
469 2017-12-13 13:30    KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
468 2017-12-14 15:00    Exploring the Universe via GWs in the era of multi-messenger astronomy
467 2017-12-15 09:20    Workshop on Magnetism in Unconventional Superconductors 개최 file
466 2018-02-12 15:00    The recent result of XMASS Experiment
465 2018-03-16 14:30    산화물 다층박막에서의 다양한 물리현상 file
464 2018-03-16 16:00    Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
463 2018-04-06 10:00    Entanglement and thermalization in many-body systems: recent progress file
462 2018-04-09 11:00    Doublon-holon origin of the subpeaks at the Hubbard band edges file
461 2018-04-11 13:30    Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
460 2018-04-11 16:00    Non-Gaussian states of multimode light generated via hybrid quantum information processing file
459 2018-04-13 10:00    Quantum meets Mechanics: from Quantum Information to Fundamental Research file
458 2018-05-09 16:00    Recent advances in thermoelectric bulk composites file
457 2018-05-11 14:30    Disordered Floquet topological insulators file
456 2018-05-11 16:00    암페어 단위 재정의와 단전자 펌프 소자 개발 file