Plasma acceleration from radio-frequency discharge in dielectric capillary
Plasma acceleration from radio-frequency discharge in dielectric capillary
复制标题
介电毛细管中射频放电的等离子体加速
DOI：
10.1063/1.2214127
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发表时间：
2006
影响因子：
4
通讯作者：
N. Fisch
中科院分区：
文献类型：
--
作者：
A. Dunaevsky;Y. Raitses;N. Fisch
在介质毛细管中用电容射频放电产生了能量为几十eV的准中性等离子体流。毛细管开口端的电位梯度和毛细管放电中的高温电子促进了离子加速。等离子体流产生于内径为10.8mm、长度为10 mm的陶瓷毛细管，气体流速为2- 10 SCCM（SCCM表示STP下的立方厘米/分钟），输入功率为15- 20 W。离子能谱由高能量加速离子和由于加速区域中的电离而形成的低能量尾部组成。相对较宽的羽流角为1.65 °，表明加速区位于毛细管外，呈凸形。在2SCCM的流量和15 W的输入功率下，估算的总效率达到2%-3%。这种方法可能是有吸引力的微推进应用，由于其简单，重量轻，尺寸小的源，和没有…
A capacitive rf discharge was demonstrated in a dielectric capillary for generation of quasineutral plasma flow with energies of several tens of eV. A potential gradient at the open end of the capillary and high-temperature electrons in the capillary discharge promote the ion acceleration. The plasma flow was generated from a ceramic capillary with inner diameter of ∼0.8mm and a length of ∼10mm, at a gas flow rate of 2–10SCCM (SCCM denotes cubic centimeter per minute at STP) and input power of 15–20W. The ion energy spectrum consists of high-energy accelerated ions and a low-energy tail formed due to ionization in the acceleration region. The relatively wide plume angle of ∼65° indicates that the acceleration region is placed outside the capillary and has a convex shape. Estimated total efficiency at 2SCCM Xe flow rate and 15W input power reaches 2%–3%. This approach may be attractive for micropropulsion applications due to its simplicity, low weight and small dimensions of the source, and the absence of ...