Journal of the Korean institute of surface engineering (한국표면공학회지)
- Volume 34 Issue 5
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- Pages.367-377
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- 2001
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- 1225-8024(pISSN)
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- 2288-8403(eISSN)
Atmospheric Pressure Plasma Research Activity in Korea
- Uhm, Han S. (Department of Molecular Science & Technology, Ajou University)
- Published : 2001.10.01
Abstract
Plasma is generated by electrical discharge. Most plasma generation has been carried out at low-pressure gas typically less than one millionth of atmospheric pressure. Plasmas are in general generated from impact ionization of neutral gas molecules by accelerated electrons. The energy gain of electrons accelerated in an electrical field is proportional to the mean free path. Electrons gain more energy at low-pressure gas and generate plasma easily by ionization of neutrals, because the mean free path is longer. For this reason conventional plasma generation is carried out at low pressures. However, many practical applications require plasmas at high-pressure. In order to avoid the requirement for vacuum pumps, researchers in Korea start to develop plasmas in high-pressure chambers where the pressure is 1 atmosphere or greater. Material processing, environmental protection/restoration and improved energy production efficiency using plasmas are only possible for inexpensive bulk plasmas. We thus generate plasmas by new methods and plan to set foundations for new plasma technologies for
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