A Fully-Sealed Carbon-Nanotube Cold-Cathode Terahertz Gyrotron.
A Fully-Sealed Carbon-Nanotube Cold-Cathode Terahertz Gyrotron.
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完全密封的碳 - 纳米管冷 - 阴极Terahertz Gyrotron。
DOI：
10.1038/srep32936
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发表时间：
2016-09-09
影响因子：
4.6
通讯作者：
Deng S
中科院分区：
文献类型：
--
作者：
Yuan X;Zhu W;Zhang Y;Xu N;Yan Y;Wu J;Shen Y;Chen J;She J;Deng S
基于冷阴极真空电子技术的吉赫到太赫兹辐射源受到追捧，因为其独特的瞬时开启和节能特性对于军事和空间应用非常重要。报道了一种采用碳纳米管（CNT）冷阴极的吉赫回旋管。本文首次报道了全密封碳纳米管冷阴极0.22太赫兹回旋管的实现，典型输出功率为500 mW。为了实现这一目标，我们已经研究了机制负责碳纳米管生长在弯曲形状的金属表面，场发射从侧壁的碳纳米管，和CNT和衬底材料之间的结晶界面结。我们获得了碳纳米管在锥柱不锈钢电极表面的均匀生长和直接生长，以及碳纳米管尖端和侧壁的场发射。具有高质量、高发射性能的碳纳米管是成功研制碳纳米管太赫兹回旋管的关键。此外，我们已经开发了一种磁注入电子枪使用碳纳米管冷阴极，利用这种传统的枪设计的优点，使大面积的发射表面被用来提供大电流的电子束。结果表明，利用碳纳米管冷阴极电子枪可以实现更高输出功率和更高辐射频率的太赫兹回旋管。
Gigahertz to terahertz radiation sources based on cold-cathode vacuum electron technology are pursued, because its unique characteristics of instant switch-on and power saving are important to military and space applications. Gigahertz gyrotron was reported using carbon nanotube (CNT) cold-cathode. It is reported here in first time that a fully-sealed CNT cold-cathode 0.22 THz-gyrotron is realized, typically with output power of 500 mW. To achieve this, we have studied mechanisms responsible for CNTs growth on curved shape metal surface, field emission from the sidewall of a CNT, and crystallized interface junction between CNT and substrate material. We have obtained uniform growth of CNTs on and direct growth from cone-cylinder stainless-steel electrode surface, and field emission from both tips and sidewalls of CNTs. It is essential for the success of a CNT terahertz gyrotron to have such high quality, high emitting performance CNTs. Also, we have developed a magnetic injection electron gun using CNT cold-cathode to exploit the advantages of such a conventional gun design, so that a large area emitting surface is utilized to deliver large current for electron beam. The results indicate that higher output power and higher radiation frequency terahertz gyrotron may be made using CNT cold-cathode electron gun.
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影响因子：
4
作者：
Choi, WB;Chung, DS;Kim, JM
通讯作者：
Kim, JM
DOI：
10.1007/s10762-009-9547-x
发表时间：
2009-12-01
影响因子：
2.9
作者：
Manohara, Harish M.;Toda, Risaku;Siegel, Peter H.
通讯作者：
Siegel, Peter H.
影响因子：
1.7
作者：
Ren, H;Deng, SZ;Xu, NS
通讯作者：
Xu, NS
影响因子：
1.5
作者：
Whaley, DR;Gannon, BM;Spindt, CA
通讯作者：
Spindt, CA
影响因子：
3.1
作者：
Whaley, David R.;Duggal, Ramon;Spindt, Charles A.
通讯作者：
Spindt, Charles A.