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

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 일시 장소 연사 제목
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공지 2019/09/02 - 12/09  Seminar Room 1501  이호성 박사 (한국표준과학연구원) and etc.  Fall 2019: Physics Colloquium
63 DEC. 16~18 (Sun~Tue)  E6-2. 1st fl. #1323  Prof. Keisuke Totsuka  Lectures on 2d Conformal Field Theory file
62 Dec. 26 (Wed.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Isaac H. Kim  Brane-like defect in 3D toric code file
61 DEC. 27 (Thu), 04:00 PM  E6-2. 1st fl. #1323  Prof. Na Young Kim  Quantum Innovation (QuIN) Laboratory file
60 Mar. 29 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Seung Hyub Baek  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
59 Mar. 29 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Taeyoung Choi  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
58 Apr. 19 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Seok Kyun Son  Graphene and hBN heterostructures file
57 Apr. 19 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. YoungWoo Nam  A family of finite-temperature electronic phase transitions in graphene multilayers file
56 Sep. 10 (Tue.), 03:00 PM  E6-2. 1st fl. #1323  Dr. Mikhail Kiselev  Two-Stage Kondo Effect file
55 2016/03/11 1:30 PM  E6-2. 1st fl. #1501  Dr. Kwon Park  Topological phases of matter in nonequilibrium: Topology of the Wannier-Stark ladder
54 2016/03/11 4 PM  E6-2. 1st fl. #1501  Dr. Tae-Hwan KIM (POSTECH)  Jan. Switching handedness of of chiral solitons in Z4 topological insulators
53 Apr. 01 (Fri.) 2:30 PM  E6-2. 1st fl. #1501  Dr. KICHEON KANG, Chonnam National University  Interference of single charged particles without a loop and dynamic nonlocality
52 Apr. 01 (Fri.) 4:15 PM  E6-2. 1st fl. #1501  Dr. JONG SOO LIM, KIAS  Cotunneling drag effect in Coulomb-coupled quantum dots
51 Apr. 08 (Fri.), 13:30 PM  E6-2. 1st fl. #1501  Dr. Yunkyu Bang, Chonnam National Univ.  Theoretical Overview of Iron-based superconductors and its future
50 2015/10/16, 4PM  E6-2. 2nd fl. #2501  Prof. Yung-Fu Chen(Solid-state Laser Physics Laboratory,National Central University)  Fluctuations of entropy production in partially masked electric circuits
49 2015/09/14, 2PM  E6-2. 2nd fl. #2501  Dr. Hae Ja Lee ( Stanford University, SLAC )  Ultrafast X-ray Studies on Dynamics Matter in Extreme Conditions
48 Jan.9 (Wed.), 04:00 PM  E6-2. 2nd fl. #2501  Dr. Heung-Sik Kim  Molecular Mott state in the deficient spinel GaV4S8 file
47 Jun. 18 (MON), 10:00 AM  E6-2. 2nd fl. #2502  Dr. Thibault VOGT  Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file
46 NOV. 23 (Fri), 03:00 PM  E6-2. 2st fl. #2501  Prof. Sang-Jin Sin  Entanglement string and Spin Liquid with Holographic duality file
45 JAN. 7 (Mon), 03:00 PM  E6-2. 2st fl. #2501  Dr. Byoung min Kang  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
44 MAR. 26 (TUE), 0300 PM  E6-2. 2st fl. #2501  Prof. Jung Hoon Han  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file