Wide-range characteristics of beam perveance and saddle point potential of LIPS-200 ion thruster

Xueer ZHANG; Tianping ZHANG; Detian LI; Juanjuan CHEN; Yanhui JIA

doi:10.1088/2058-6272/ac7fe4

Plasma Science and Technology > 2022 > 24(11): 115501. > DOI: 10.1088/2058-6272/ac7fe4

Xueer ZHANG, Tianping ZHANG, Detian LI, Juanjuan CHEN, Yanhui JIA. Wide-range characteristics of beam perveance and saddle point potential of LIPS-200 ion thruster[J]. Plasma Science and Technology, 2022, 24(11): 115501. DOI: 10.1088/2058-6272/ac7fe4

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Wide-range characteristics of beam perveance and saddle point potential of LIPS-200 ion thruster

Science and Technology on Vacuum Technology and Physics Laboratory, Key Laboratory of Space Electric Propulsion Technology of Gansu Province, Lanzhou Institute of Physics, Lanzhou 730000, People's Republic of China

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Corresponding author:
Detian LI, E-mail: lidetian@sina.com
Received Date: February 13, 2022
Revised Date: June 02, 2022
Accepted Date: July 07, 2022
Available Online: December 05, 2023
Published Date: August 21, 2022

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Abstract

Abstract

Both the long-life and multi-mode versions of LIPS-200 ion thruster are under investigation in LIP (Lanzhou Institute of Physics). To confirm the feasible ranges of the beam current and accel (abbreviation for accelaration) grid potential to apply to the thruster, the wide-range beam perveance (the state of beam focus) and saddle point potential (the lowest potential along beamlet centerline) characteristics of LIPS-200 are studied with a test-verified PIC-MCC (Particle in Cell-Monte Carlo Collisions) model. These characteristics are investigated with both the initial and the eroded states of the accel grid aperture diameter. The results show that the feasible ranges of these parameters with respect to perveance/crossover (overfocused) limit extend as the operating time accumulates, while the feasible range of accel grid potential narrows due to a reduced EBSF (electron backstreaming failure) margin. The feasible ranges determined by the initial condition are: (ⅰ) the beam current up to 0.981 A, and (ⅱ) the accel grid potential up to -85 V. A 23% enlargement of the aperture diameter would bring up to 48 V of EBSF margin loss.
- ion thruster,
- perveance limit,
- crossover limit,
- saddle point potential,
- parameter range

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Acknowledgments

China Aerospace Science and Technology Corporation independent research and development projects (No. YF-ZZYF-2021-132).

References (33)

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