| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Interaction between plasma and electromagnetic field in ion source of 10 cm ECR ion thruster |
| Hao Mou(牟浩)1, Yi-Zhou Jin(金逸舟)2, Juan Yang(杨涓)1,†, Xu Xia(夏旭)1, and Yu-Liang Fu(付瑜亮)1 |
1 College of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2 Shanghai Institute of Space Electric Propulsion, Shanghai 200000, China |
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Abstract Through diagnosing the plasma density and calculating the intensity of microwave electric field, four 10 cm electron cyclotron resonance (ECR) ion sources with different magnetic field structures are studied to reveal the inside interaction between the plasma, magnetic field and microwave electric field. From the diagnosing result it can be found that the plasma density distribution is controlled by the plasma generation and electron loss volumes associated with the magnetic field and microwave power level. Based on the cold plasma hypothesis and diagnosing result, the microwave electric field intensity distribution in the plasma is calculated. The result shows that the plasma will significantly change the distribution of the microwave electric field intensity to form a bow shape. From the boundary region of the shape to the center, the electric field intensity varies from higher to lower and the diagnosed density inversely changes. If the bow and its inside lower electric field intensity region are close to the screen grid, the performance of ion beam extracting will be better. The study can provide useful information for the creating of 10 cm ECR ion source and understanding its mechanism.
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Received: 05 October 2021
Revised: 02 January 2022
Accepted manuscript online: 07 January 2022
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PACS:
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52.75.Di
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(Ion and plasma propulsion)
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52.70.-m
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(Plasma diagnostic techniques and instrumentation)
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52.75.-d
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(Plasma devices)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11875222). |
Corresponding Authors:
Juan Yang
E-mail: yangjuan@nwpu.edu.cn
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Cite this article:
Hao Mou(牟浩), Yi-Zhou Jin(金逸舟), Juan Yang(杨涓), Xu Xia(夏旭), and Yu-Liang Fu(付瑜亮) Interaction between plasma and electromagnetic field in ion source of 10 cm ECR ion thruster 2022 Chin. Phys. B 31 075202
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