物理学报2017，Vol.66Issue(5)：212-222,11.DOI:10.7498/aps.66.055101
微空心阴极维持辉光放电的时空特性
Spatio-temporal characteristics of microhollow cathode sustained discharge
摘要
Abstract
Micro hollow cathode sustained discharge (MCSD) is simulated by using a fluid model, and the spatiotemoral characteristics of the electric potential, electron density, ion density and electric field are investigated. Results show that the MCSD acts in different modes at different times. The first stage is the Townsend discharge mode. The second is a transition mode from Townsend discharge mode to a hollow cathode effect mode, and the electron density, ion density and electric field near the cathode rise drastically, in which the MCSD is ignited initially. The third stage is the hollow cathode effect mode, and the MCSD forms generally. The last stage is stable discharge state. At the stable discharge stage, the electron density and the ion density each achieve 1015 cm?3 with a peak density located in the center of hollow cathode chamber. The value of electron density in the MCSD region is on the order of 1013 cm ?3. The results also show that the micro-hollow cathode discharge (MHCD) contributes to the formation of MCSD, and the MCSD also facilitates the development of MHCD. In addition, the voltage on the second anode has important influence on the distributions of electric potential, electron density and electric field both inside the hollow cathode and outside the hollow cathode. Moreover, the influence on the MCSD is more apparent than the influence on the MHCD. With the increase of voltage on the second anode, the cathode sheath close to the first anode becomes more and more apparent. The second anode is necessary for the formation of micro-hollow cathode sustained discharge.关键词
微空心阴极维持放电/流体模型/电势/电子密度Key words
micro hollow cathode sustained discharge/fluid model/electric potential/electron density引用本文复制引用
何寿杰,张钊,赵雪娜,李庆..微空心阴极维持辉光放电的时空特性[J].物理学报,2017,66(5):212-222,11.基金项目
国家自然科学基金(批准号:11205046)、河北省自然科学基金(批准号:A2016201025)和河北省高等学校科学技术研究项目(批准号:YQ2013017)资助的课题. Project supported by the National Natural Science Foundation of China (Grant No. 11205046), the Natural Science Foun-dation of Hebei Province, China (Grant No. A2016201025), and the Science and Technology Research Projects of Colleges and Universities in Hebei Province, China (Grant No. YQ2013017). （批准号:11205046）
