Improved operation of the nonambipolar electron source.
Improved operation of the nonambipolar electron source.
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改进了非双极性电子源的操作。
DOI：
10.1063/1.2979012
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
N. Hershkowitz
中科院分区：
文献类型：
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作者：
B. Longmier;N. Hershkowitz
非双极电子源 (NES) 已取得重大改进，这是一种基于射频 (rf) 等离子体的电子源，不依赖于阴极表面的电子发射 [B. Longmier、S. Baalrud 和 N. Hershkowitz，Rev. Sci。仪器。 77, 113504 (2006)]。 NES 原型机使用 2 SCCM（SCCM 表示 STP 下的立方厘米每分钟）Xe、13.56 MHz 下的 1300 W 射频功率，产生了 30 A 的连续电子流，产生了 180 倍的气体利用率。在使用氩气推进剂、使用 15 SCCM Ar、1000 W 射频和 100 G 磁场的 NES 操作期间，还发现了螺旋模式转变。这种 NES 技术能够取代空心阴极电子源并实现高功率电力推进任务，消除了许多离子推进器之前面临的寿命限制之一。
Significant improvements have been made to the nonambipolar electron source (NES), a radio frequency (rf) plasma-based electron source that does not rely on electron emission at a cathode surface [B. Longmier, S. Baalrud, and N. Hershkowitz, Rev. Sci. Instrum. 77, 113504 (2006)]. A prototype NES has produced 30 A of continuous electron current, using 2 SCCM (SCCM denotes cubic centimeter per minute at STP) Xe, 1300 W rf power at 13.56 MHz, yielding a 180 times gas utilization factor. A helicon mode transition has also been identified during NES operation with an argon propellant, using 15 SCCM Ar, 1000 W rf, and 100 G magnetic field. This NES technology has the ability to replace hollow cathode electron sources and to enable high power electric propulsion missions, eliminating one of the lifetime restrictions that many ion thrusters have previously been faced with.