| 碳纳米管阴极强流脉冲发射放气质谱分析 |
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| 引用本文： | 谌怡,张篁,刘星光,夏连胜,杨安民.碳纳米管阴极强流脉冲发射放气质谱分析[J].物理学报,2011,60(8):80702-080702. |
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| 作者姓名： | 谌怡 张篁 刘星光 夏连胜 杨安民 |
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| 作者单位： | 中国工程物理研究院流体物理研究所,绵阳 621900 |
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| 基金项目： | 新金属材料国家重点实验室基金(批准号: 20082D-10)资助的课题. |
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| 摘 要： | 借助2 MeV直线感应加速器注入器平台,利用四极质谱仪研究了碳纳米管阴极的强流脉冲发射放气质谱特性. 研究结果表明:在脉冲高压电场下,碳纳米管阴极材料释放出较多的吸附气体,解吸气体又以CO2,N2(CO),H2三种气体居多,这些解吸气体在阴极等离子体形成过程中起着重要的作用. 通过分析解吸气体成分的含量,证明碳纳米管阴极强流脉冲电子发射过程为场致等离子体发射,而不是场致爆炸发射.
关键词：
碳纳米管阴极
强流脉冲发射
质谱分析
场致等离子体发射
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| 关 键 词： | 碳纳米管阴极 强流脉冲发射 质谱分析 场致等离子体发射 |
| 收稿时间： | 2010-09-23 |
| 修稿时间： | 3/4/2011 12:00:00 AM |
Outgassing mass spectrum analysis with intense pulsed emission of carbon nanotube cathode |
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| Shen Yi,Zhang Huang,Liu Xing-Guang,Xia Lian-Sheng and Yang An-Min.Outgassing mass spectrum analysis with intense pulsed emission of carbon nanotube cathode[J].Acta Physica Sinica,2011,60(8):80702-080702. |
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| Authors: | Shen Yi Zhang Huang Liu Xing-Guang Xia Lian-Sheng and Yang An-Min |
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| Institution: | Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China |
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| Abstract: | The outgassing mass spectrum property with intense pulsed emission of the carbon nanotube(CNT) cathode is investigated on a 2 MeV linear induction accelerator injector by using the quadrupole mass spectrometer. The results show that the cathode has a capability of desorbing gases from the CNT cathode under pulsed high voltage. There are significant CO2, N2(CO) and H2 desorbing gases which play an important role in the formation of the cathode plasma. The mechanism of electron emission of CNT cathode is plasma-induced field emission, rather than explosive field emission, which is proved by analyzing the desorbed gases component. |
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| Keywords: | carbon nanotube cathode intense pulsed emission mass spectrum analysis plasma-induced field emission |
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