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Characteristics of the discharge of a charged dielectric in low-pressure air |
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| Affiliation: | 1. Dept. Ciencias Básicas, Universidad Autónoma Metropolitana, Av. San Pablo 180, 02200 Mexico DF, Mexico;2. Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510 Mexico DF, Mexico;1. CERN, PH Department, 1211 Geneva, Switzerland;2. Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014, University of Jyväskylä, Finland;3. Helsinki Institute of Physics, P.O. Box 64, FI-00014, University of Helsinki, Finland |
| Abstract: | A charged dielectric generates a series of discharges in the surrounding air when the pressure is steadily reduced from near atmospheric to fractions of a torr. The dielectrics here employed were Mylar and Teflon. With positive polarity different discharge regimes were observed as the pressure varied: spark and long streamers at relatively high pressure; diffuse cloud-like discharges below 266 Pa (2 torr). With negative polarity it is difficult to induce a discharge, due to the absence of an electron-emitting surface. Similarities between our results and some of the features of mesospheric and stratospheric discharges are discussed. |
| Keywords: | Dielectric discharging Charged dielectric Low-pressure discharge Mesospheric discharges Streamers |
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