摘要
从吹出等离子体浓度高的要求出发 ,考察诸多大气等离子体发生技术后看到 ,介质阻挡放电产生等离子体是最有效且较方便的技术。在实验室中得到的放电电流曲线证实了电离区的悬浮在空气中的离子可被吹出。被吹出等离子体的浓度虽经受了扩散、复合、气流和电场迁移等因素的影响 ,使浓度随距离增加而衰减 ,但在离开电离区 15 cm远处仍测得离子数密度达 10 9量级 。
From a point of view of high ion density of blown out plasma, DBD(dielectric barrier discharge) is the most efficient and convenient technique among many generation techniques of atmospheric plasma. DBD allows that the atmosphere is strongly ionized by high voltage on the one hand, and the electric field can be very rapidly cutoff on the other hand to block the quick movement of the ions to the electrodes, the ions stay in air and be easily blown out of the ionization region. The discharge current curves obtained in our laboratory also confirm that there are ions suspending in air and waiting for being blown out. Ion density of the blown out plasma is getting less and less along the way because of diffusion, recombination, air flow, and electric mobility, but still keep an order of magnitude of 10 9 per cm 3 at a distance of 15 cm away from the ionization region. This is not easy to obtain for the other generation techniques.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2002年第B12期57-58,共2页
High Voltage Engineering
关键词
介质阻挡放电
等离子体
电离
atmospheric plasma dielectric barrier discharge ionization
