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Test system for distribution characteristics of artificial plasmas

A technology of plasma and distribution characteristics, which is applied in the field of test systems for ion distribution characteristics, can solve the problems of test methods that do not form plasma characteristics, and achieve the effects of improving test efficiency and suppressing secondary electron emission

Inactive Publication Date: 2013-04-03
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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Problems solved by technology

Since domestic electric propulsion technology has not been applied on spacecraft, there is no test method for the characteristics of plasma generated by electric propulsion

Method used

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Embodiment Construction

[0017] See attached figure 1 , a test system for artificial plasma distribution characteristics, which includes: electric propulsion 1, Langmuir probe, retardation potential analyzer, vacuum system 6 and signal collection device;

[0018] The electric propulsion 1 is installed inside the vacuum system 6, and the electric propulsion 1 can be used to generate artificial plasma;

[0019] The diameter of the probe of the Langmuir probe among the present invention is 5.6cm, and the surface of the probe adopts ion sputtering gold plating process, and the thickness of the gold-plated film is 200-500nm; figure 2 , when the probe is inserted into the plasma, if the potential of the probe is much lower than the potential of the surrounding plasma, the probe receives the ions in the surrounding plasma and repels the electrons in the plasma. At this time, the probe current is the ion saturation current, Corresponding to the ion saturation region in the I-V curve diagram; with the gradua...

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Abstract

The invention belongs to the technical field of vacuum measurement, and particularly relates to a test system for distribution characteristics of artificial plasmas. The test system comprises an electric propeller (1), Langmuir probes, retarding potential analyzers, a vacuum system (6) and a signal collection device; the electric propeller (1) is installed in the vacuum system (6); the probe head surfaces of the Langmuir probes are subjected to ion-sputtering gold-plating treatment, and the thickness of a gold-plating film is 200-500nm; and the Langmuir probes and the retarding potential analyzers are used together and are connected with the signal collection device outside the vacuum system (6), and the vacuum system (6) is provided with two groups of Langmuir probes and the retarding potential analyzers which are arranged at positions (located on the same vertical line direction) with different distances away from the electric propeller (1). According to the test system disclosed by the invention, the Langmuir probes and the retarding potential analyzers are comprehensively utilized for testing the characteristics of temperature, density, energy spectrum and the like when the electric propeller generates the artificial plasmas, so as to obtain the characteristics of the artificial plasmas.

Description

technical field [0001] The invention belongs to the technical field of vacuum measurement, and in particular relates to a test system for man-made plasma distribution characteristics. Background technique [0002] Electric propulsion is a space propulsion technology with high specific impulse, long life, and high efficiency. It can greatly reduce the amount of propellant carried, significantly increase the payload ratio, and extend the life of satellites. With the increase of our country's demand for satellite long life and high performance, the use of electric propulsion technology will become an inevitable trend. When the propeller is working, it will generate low-temperature, high-density artificial plasma, which will exchange charges with the high-temperature, low-density plasma that naturally exists in space, making the satellite’s charging and discharging process more complicated, resulting in satellite high-voltage solar cells. Hazards such as power loss, short-circu...

Claims

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Application Information

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IPC IPC(8): G01D21/02
Inventor 陈益峰田凯马亚莉李得天秦晓刚杨生胜史亮李存惠柳青汤道坦王俊
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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