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)
285 2024-09-26 14:00    Quantum spin nematic phase in a square-lattice iridate
284 2019-08-27 16:00    Critical current properties of Fe-based superconductors file
283 2020-01-17 16:00    Symmetry Breaking and Topology in Superfluid 3He file
282 2024-08-16 11:00    Cathodoluminescence for nanophotonics: Applications to plasmonic bandgap materials and perovskite semiconductors file
281 2023-11-30 10:30    [High-Energy Theory Seminar] 3d-3d correspondence and 2d N = (0,2) boundary conditions
280 2019-09-26 16:00    Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file
279 2019-12-27 15:00    The superconducting order parameter puzzle of Sr2RuO4 file
278 2019-12-27 15:00    The superconducting order parameter puzzle of Sr2RuO4 file
277 2024-10-14 11:00    [RSVP, Oct 14th Mon] Ambassador of Hungary to Republic of Korea Special Lecture file
276 2024-10-21 13:00    [Physics Seminar] “Non-Hermitian Point-Gap Topology in Junction Systems” file
275 2024-01-16 16:00    [High Energy Theory Seminar] Towards quantum black hole microstates
274 2022-05-12 16:00    New frontiers of electroweak physics at the LHC
273 2022-05-19 16:00    Chasing Long Standing Neutrino Anomalies with MicroBooNE
272 2022-05-18 16:00    Geometry, Algebra, and Quantum Field Theory
271 2022-09-15 13:00    AdS black holes: a review
270 2016-11-18 10:30    Non-equilibrium many-body spin dynamics in diamond
269 2016-10-27 16:00    Terahertz Metal Optics
268 2019-06-28 13:30    Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures file
267 2016-04-08 13:30    Theoretical Overview of Iron-based superconductors and its future
266 2017-09-26 11:00    Time-resolved ARPES study of Dirac and topological materials