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)
535 2016-06-16 16:00    Quantum information processing using quantum dots and photonic crystal cavities
534 2016-07-07 14:00    Let there be topological superconductors
533 2016-07-08 11:00    Isostatic magnetism
532 2016-07-08 14:00    Electronic quasiparticles in the quantum dimer model
531 2016-07-28 16:00    Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
530 2016-08-04 14:30    Relational Logic (with applications to Quantum Mechanics, String Theory, Cosmology, Neutrino Oscillations, Statistical Mechanics)
529 2016-09-02 14:30    Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
528 2016-09-02 16:00    Quantum Electrical Transport in Topological Insulator Nanowires
527 2016-09-05 16:00    Physics Colloquium : 2016 Fall file
526 2016-09-21 16:00    Entanglement probe of two-impurity Kondo physics
525 2016-09-22 15:30    Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
524 2016-09-22 15:30    Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
523 2016-09-29 16:00    2016 Fall, Physics Seminar Serises file
522 2016-09-29 16:00    Large-scale Silicon Photonic MEMS Switches
521 2016-09-29 16:00    Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
520 2016-10-07 13:30    “Symmetry and topology in transition metal dichalcogenide?”
519 2016-10-07 16:00    “Tilt engineering of 4d and 5d transition metal oxides?”
518 2016-10-17 11:00    IMS and examples of the studies on optoelectronic materials
517 2016-10-18 13:30    "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
516 2016-10-18 15:00    “Hybrid quantum systems with mechanical oscillators”