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Study on Magnetized RF Discharge with Very Small-Diameter

机译:小直径磁化射频放电的研究

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To investigate characteristics and estimate propulsion performance of a high-density radio frequency plasma with a very small diameter, we have developed the Small Helicon Device (SHD) and measured an electron density n e, an ion velocity v i and an emission intensity of ArII under various conditions such as a discharge diameter (down to 3 mm), a mass flow rate and a gas species. Using quartz discharge tubes with inner diameter (i.d.) of 3, 10, 20 mm with an Ar gas, n e of (2.5 - 6) × 1012 (estimated from optical measurement), ~2.5 × 1012 and ~2.0 × 1012 cm?3, respectively, at ?40 mm downstream from an excitation antenna was obtained. Using the 20 mm i.d. tube with a H2 gas, v i ~40 km/s was achieved in the presence of the magnetic field gradient.
机译:为了研究直径很小的高密度射频等离子体的特性并估算其推进性能,我们开发了小型螺旋装置(SHD),并测量了电子密度n e ,离子速度v i 和ArII在各种条件下的发射强度,例如放电直径(低至3 mm),质量流量和气体种类。使用内径(id)为3、10、20 mm的石英放电管和Ar气,n e 为(2.5-6)×10 12 (根据光学测量),在激发下游40 mm处分别为〜2.5×10 12 和〜2.0×10 12 cm ?3 获得天线。使用20毫米内径在存在磁场梯度的条件下,H 2 气的电子管,v i 〜40 km / s。

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