Influence of vacuum space on formation of potential sheath in plasmas |
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| Institution: | 1. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522510, A.P., India;2. Department of Physics, Aditya Engineering College, Surampalem, 533437, A.P., India;3. Department of Physics, Gudlavalleru Engineering College, Gudlavalleru, 521356, A.P., India;4. Department of Physics, S.V.R.M. College, Nagaram, 522 268, A.P., India;5. Department of Physics, Andhra Christian College, Guntur, 522001, A.P., India;1. Advanced Materials Research Lab, Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, USA;2. Aviation Development Directorate (ADD), U.S. Army Combat Capabilities Development Command, Aviation & Missile Center, Fort Eustis, USA;1. College of Materials Science and Engineering, Xi’an University of Technology, Xi’an, 710048, China;2. School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia;3. Xi’an Aerospace Power Machine Factory, Xi’an, 710025, China;1. Department of Physics, Faculty of Sciences, University of Gujrat, Gujrat, Pakistan;2. Department of Physics, Khwaja Fareed University of Engineering and Information Technology, RYK, Pakistan;3. Department of Chemical Engineering, Khwaja Fareed University of Engineering and Information Technology, RYK, Pakistan;4. Department of Mechanical Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia;5. Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, 21589, Saudi Arabia;6. Department of Chemical and Materials Engineering, King Abdulaziz University, Jeddah, 21589, Saudi Arabia;7. Department of Physics, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia;1. School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China;2. School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, China;3. Weichai Power Co., Ltd, 197A Fushou East Street, Weifang High-New Technology Industrial Development Zone, Weifang, Shandong, 261001, China;4. School of Energy and Power Engineering, Shandong University, Jinan, Shandong, 250061, China;5. Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, China |
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| Abstract: | Properties of potential sheaths developed in plasmas are investigated in terms of the plasma Debye length and the dimension of vacuum space. Biased plasma potential and the potential profile depend very sensitively on the geometrical configuration of plasma and vacuum space. The potential sheath is never developed near electrodes in high-density plasmas where the Debye length is much less than the dimension of the vacuum space. In this case, most of the potential drops occur in the vacuum space and almost no electric field exists inside the plasma. Parametric investigation of the potential sheath in terms of the vacuum-space and plasma dimensions is carried out. |
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