Electric Discharge in Pin-Plate Audio Frequency Plasma

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（11）
• 页码范围: 166-169
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/11/115202

摘要

Experimental results on some properties of electric discharge initiated by audio frequency voltages in the range of 50-10000Hz are presented.These results indicate that there are at least two modes of plasma ionic oscillations.A resonance-type behavior is seen when the driving field frequency becomes equal to the plasma ionic frequency.The resultsfor plasma density and plasma temperature for both modes are presented.Electric discharge studies have led to great developments in a wide range of science and technology applications.One may broadly categorize the electric discharges in gases into two main types,i.e.direct dc and ac discharges.A wide range of dc discharge properties related to geometry,type of gases,pressure etc.has been studied theoretically and experimentally.There has been a comparable amount of work related to ac discharges,which involve both inductive and capacitive coupling of an electric field to gases.However,for this type of discharge,one can argue that the emphases have been more focused on the radio and microwave ranges of ac frequency spectra.Results on both dc and rf discharges is now contained in many textbooks.[1-3] Although many studies related to audio frequency ranges have been carried out,their number is by no means comparable to those in the rf range.This may be due to two main reasons.The first stems from the theoretical arguments that as far as capacitive coupling is concerued,one would not expect to observe any major differences between dc and audio frequency discharge[4] due to the relaxation time properties of plasmas.[5]