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)
454 2018-05-17 13:30    Quantum Spin Liquid in Kitaev Materials file
453 2018-05-29 16:00    Investigation on metal nanostructure/semiconductor junction and its applications file
452 2018-05-31 16:00    Dynamic control of optical properties with gated-graphene metamaterials file
451 2018-06-01 11:00    Topological phases in low-dimensional quantum materials file
450 2018-06-14 10:00    Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation file
449 2018-06-18 10:00    Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file
448 2018-06-22 10:00    Success in Research Career file
447 2018-06-22 16:00    Tuning functional properties of BiFeO3 films using strain and growth chemistry file
446 2018-07-02 15:00    High Precision Magnetic Field Measurement for the Muon g-2 Experiment file
445 2018-07-09 14:00    The principles of collective learning file
444 2018-07-12 17:00    The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
443 2018-07-13 14:00    Loop Induced Single Top Partner Production and Decay at the LHC
442 2018-07-26 14:00    Inflation in String Theory and Backreaction file
441 2018-07-27 13:30    Magnetic reversal of artificial spin ice file
440 2018-07-27 15:00    Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
439 2018-08-01 11:00    Future of AI: Is the brain a computer? file
438 2018-09-04 14:30    Ultrafast time- and angle-resolved photoemission spectroscopy (tr-ARPES) with extreme ultraviolet laser pulses file
437 2018-09-05 16:00    Shining a light on fractional excitations file
436 2018-09-07 15:00    Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
435 2018-09-20 16:00    Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file