Theoretical study on characteristics of high voltage Child-sheath of mixed D<sup>+</sup> and Ti<sup>2+</sup> plasmas

Shen Bohao; Dong Ye; Zhou Qianhong; Yang Wenyuan; Dong Zhiwei

doi:10.11884/HPLPB202234.210457

Volume 34 Issue 7

May 2022

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Shen Bohao, Dong Ye, Zhou Qianhong, et al. Theoretical study on characteristics of high voltage Child-sheath of mixed D+ and Ti2+ plasmas[J]. High Power Laser and Particle Beams, 2022, 34: 075011. doi: 10.11884/HPLPB202234.210457

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Shen Bohao, Dong Ye, Zhou Qianhong, et al. Theoretical study on characteristics of high voltage Child-sheath of mixed D⁺ and Ti²⁺ plasmas[J]. High Power Laser and Particle Beams, 2022, 34: 075011. doi: 10.11884/HPLPB202234.210457

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Theoretical study on characteristics of high voltage Child-sheath of mixed D⁺ and Ti²⁺ plasmas

doi: 10.11884/HPLPB202234.210457

1.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
2.
Graduate School of China Academy of Engineering Physics, Beijing 100088, China

Received Date: 2021-10-30
Rev Recd Date: 2022-01-17

Available Online: 2022-07-04

Publish Date: 2022-05-12

Abstract

Abstract

A dynamic model for high voltage Child-sheath of mixed multi-component plasmas is built up, and the characteristics of high voltage Child-sheath of mixed D⁺ and Ti²⁺ plasmas is numerically studied. The theoretical and numerical results demonstrate as follows. The depth of Child-sheath will increase and electric field intensity on target will decrease by increasing the ratio of D⁺ to Ti²⁺, decreasing the sheath-entering velocity of D⁺ or Ti²⁺, and decreasing the density of mixed plasmas. Through the above ways, ions could achieve convergent transportation and breakdown risk on target could also be reduced. As the increase of accelerating voltage, the range of stable ion-extraction operating region will firstly increase and then decrease. By increasing the ratio of D⁺ to Ti²⁺ and decreasing the sheath-entering velocity of D⁺ or Ti²⁺, the range of stable ion-extraction operating region could be notably increased.
- mixed multi-component plasmas,
- high voltage Child-sheath,
- dynamic model

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References(15)

References

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