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The Electrostatic Cylindrical Sheath in a Plasma |
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| Authors: | Wang Chunhua Sun Xiaoxia Bai Dongxue State Key Laboratory of Materials Modification by Laser Electron and Ion Beams Dalian University of Technology Dalian China |
| Affiliation: | State Key Laboratory of Materials Modification by Laser, Electron and Ion Beams, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Materials Modification by Laser, Electron and Ion Beams, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Materials Modification by Laser, Electron and Ion Beams, Dalian University of Technology, Dalian 116024, China |
| Abstract: | The electrostatic sheath with a cylindrical geometry in an ion-electron plasma is investigated. Assuming a Boltzmann response to electrons and cold ions with bulk flow, it is shown that the radius of the cylindrical geometry do not affect the sheath potential significantly.We also found that the sheath potential profile is steeper in the cylindrical sheath compared to the slab sheath. The distinct feature of the cylindrical sheath is that the ion density distribution is not monotonous. The sheath region can be divided into three regions, two ascendant regions and one descendant region. |
| Keywords: | plasma sheath ion-electron plasma |
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