Study of electron-extraction characteristics of an inductively coupled radio-frequency plasma neutralizer

Jianwu HE (贺建武); Longfei MA (马隆飞); Senwen XUE (薛森文); Chu ZHANG (章楚); Li DUAN (段俐); Qi KANG (康琦)

doi:10.1088/2058-6272/aa89e1

Plasma Science and Technology > 2018 > 20(2): 25403-025403. > DOI: 10.1088/2058-6272/aa89e1

Jianwu HE (贺建武), Longfei MA (马隆飞), Senwen XUE (薛森文), Chu ZHANG (章楚), Li DUAN (段俐), Qi KANG (康琦). Study of electron-extraction characteristics of an inductively coupled radio-frequency plasma neutralizer[J]. Plasma Science and Technology, 2018, 20(2): 25403-025403. DOI: 10.1088/2058-6272/aa89e1

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Study of electron-extraction characteristics of an inductively coupled radio-frequency plasma neutralizer

1 National Micro Gravity Laboratory, Institute of Mechanics, CAS, Beijing 100190, People’s Republic of China 2 School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China

Funds: This work is supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB23030100).

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Received Date: July 12, 2017

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Abstract

Abstract

Inductively coupled radio-frequency (RF) plasma neutralizer (RPN) is an insert-free device that can be employed as an electron source in electric propulsion applications. Electron-extraction characteristics of the RPN are related to the bulk plasma parameters and the device’s geometry. Therefore, the effects of different electron-extraction apertures and operational parameters upon the electron-extraction characteristics are investigated according to the global nonambipolar flow andsheathmodel. Moreover,these models canalsobeusedtoexplain why the electron-extraction characteristics of the RPN strongly depend upon the formation of the anode spot. During the experimental study, two types of anode spots are observed. Each of them has unique characteristics of electron extraction. Moreover, the hysteresis of an anode spot is observed by changing the xenon volume-flow rates or the bias voltages. In addition, the rapid ignited method, gas-utilization factor, electron-extraction cost and other factors that need to be considered in the design of the RPN are also discussed.
- electron source,
- plasma cathode,
- RF neutralizer,
- RF plasma,
- anode spot

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References (20)

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