| Power Consideration for Pulsed Discharges in Potassium Seeded Argon |
| |
| 作者姓名： | 夏胜国 何俊佳 刘克富 |
| |
| 作者单位： | Pulse Magnetic Field Laboratory, Huazhong University of Science and Technology, Wuhan 430074 |
| |
| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 90305002. |
| |
| 摘 要： | Minimization of energy consumed in plasma generation is critical for applications, in which a large volume of plasmas is needed. We suggest that a high electron density atmospheric pressure plasmas can be generated by pulsed discharges in potassium seeded argon at an elevated temperature with a very small power input. The ionization efficiency and power budget of pulsed discharges in such plasmas are analytically studied. The results show that ionization efficiency of argon, especially at small reduced electric field E/N （the ratio of the electric field to the gas number density）, is improved effectively in the presence of small amount of potassium additives. Power input of pulsed discharge to sustain a prescribed average level of ionization in potassium seeded argon is three orders of magnitude lower than that in pure argon. Further, unlike in pure argon, it is found that very short high-voltage pulses with very high repetition rates are unnecessary in potassium seeded argon. A pulse with lOOns of pulse duration, 5kHz of repetition rate, and 2Td （1 Td = 1 × 10^-21 Vm^2） of E/N is enough to sustain an electron density of 10^19 m^-3 in 1 arm 1500K Ar＋0.1% K mixture, with a very small power input of about 0.08 × 10^4 W/m^3.
|
| 关 键 词： | 脉冲流量 等离子体 电离子 电子学 |
| 收稿时间： | 2006-10-9 |
| 修稿时间： | 2006-10-09 |
Power Consideration for Pulsed Discharges in Potassium Seeded Argon |
| |
| XIA Sheng-Guo,HE Jun-Jia,LIU Ke-Fu.Power Consideration for Pulsed Discharges in Potassium Seeded Argon[J].Chinese Physics Letters,2007,24(6):1637-1640. |
| |
| Authors: | XIA Sheng-Guo HE Jun-Jia LIU Ke-Fu |
| |
| Affiliation: | Pulse Magnetic Field Laboratory, Huazhong University of Science and Technology, Wuhan 430074 |
| |
| Abstract: | Minimization of energy consumed in plasma generation is critical for applications, in which a large volume of plasmas is needed. We suggestthat a high electron density atmospheric pressure plasmas can be generated by pulsed discharges in potassium seeded argon at an elevated temperature with a very small power input. The ionization efficiency and power budget of pulsed discharges in such plasmas are analytically studied. The results show that ionization efficiency of argon, especially at small reduced electric field E/N (the ratio of the electric field to the gas number density), is improved ffectively in the presence of small amount of potassium additives. Power input of pulsed discharge to sustain a prescribed average level of ionization in potassium seeded argon is three orders of magnitude lower than that in pure argon. Further, unlike in pure argon, it is found that very short high-voltage pulses with very high repetition rates are unnecessary in potassium seeded argon. A pulse with 100ns of pulse duration, 5kHz of repetition rate, and 2Td (1Td=1×10-21Vm2) of E/N is enough to sustain an electron density of 1019m-3 in 1 atm 1500K Ar+0.1% K mixture, with a very small power input of about0.08×104W/m3. |
| |
| Keywords: | 52 80 -s 52 50 Dg 52 25 Jm |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理快报》浏览原始摘要信息 |
|
点击此处可从《中国物理快报》下载免费的PDF全文 |
|
