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Study of Gas Heating by a Microwave Plasma Torch

Journal of Modern Physics 2012年第10期3卷 1603-1615页

作者： Katell Gadonna Oliviez Leroy philippe leprince Luis Lemos Alves Cazoline Boisse-Laporte Instituto de Plasmas e Fusao Nuclear Instituto Superior Técnico Universidade Técnica de Lisboa Lisboa Portugal Laboratoire de Physique des Gaz et des Plasmas UMR 8578 CNRS Université Paris-Sud OzsayFrance

Among the different types of microwave plasma torches, the axial injection torch (TIA) has been used for several years to create chemically active species, in applications such as gas analysis, surface processing and gaseous waste treatments. The TIA allows the coupling of microwave energy (2.45 GHz) to a gas injected axially at the nozzle’s exit. The TIA produces non-local thermodynamic equilibrium plasmas with a high luminosity and a maximum density of charged particles at the nozzle’s exit. The present work is dedicated to study the plasma created by a TIA, running at atmospheric pressure. The study involves both experiment and modeling of this torch, in order to maximize the coupling between the microwave power and the plasma and to define the optimum plasma and flow operating conditions for plasma-to-gas heat transfer.

关键词： Microwave Plasma Torch Non-Equilibrium Plasma Atmospheric Pressure Thermal Transfer Flow Modeling

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利用卫星影像获得汶川地震之同震地表变形来探讨其断层几何模型(英文)

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国际地震动态 2010年第6期31卷 32-32页

作者：郭昱廷 John Suppe Jean-philippe Avouac Sébastien leprince Francois Ayoub Depart ment of Geosciences Tai wan University EPS UC BerkeleyCalifornia

On 12th May 2008, a MW7.9 earthquake occurred on the Longmenshan fault in the mountains to the west of Sichuan Province, which shook many Asian cities and killed at least 69000 people. The surface ruptures strike NE and extend up to 270 km along the boundary between the eastern Tibetan Plateau and the Sichuan basin. It was difficult to complete the detailed mapping of surface ruptures and to measure fault slip in the field because well-defined features to correlate across the fault were rare in mountainous area. Near surface deformation is in fact composed of contributions from internal faulting and folding. Using the COSI-Corr software, we obtain coseismic ground displacements deduced from sub-pixel correlation of SPOT5 and ENVISAT and also from D-InSAR on ENVISAT. The results can provide continuous surface displacements. In the south, the results show significant shortening, generally <10 meters, and two parallel ruptures, while in the north, they show strike slip dominant and only a single rupture. Based on our results, we simulate the fault geometry in different locations. To realize the long-term fault kinematics a comparison is further needed between coseismic deformation and long-term geomorphic deformation recorded in the landforms.

关键词：汶川地震卫星影像同震几何模型地表变形 Pennsylvania California

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