CN107843776B - Space electric field detector ground plasma simulation environment experiment test system - Google Patents
Space electric field detector ground plasma simulation environment experiment test system Download PDFInfo
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- 238000009826 distribution Methods 0.000 description 13
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Abstract
The invention provides a ground plasma simulated environment experiment testing system of a space electric field detector, which mainly comprises a plasma experiment cabin, a Langmuir probe, a retarding potential plasma analyzer, an electric field detector sensor, a fixed rack, a movable rack, a stable ion source, a solar simulator, a space electric field detector signal processing unit and space electric field detector ground detection equipment, wherein the Langmuir probe, the retarding potential plasma analyzer, the electric field detector sensor, the fixed rack and the movable rack are positioned in the experiment cabin; two electric field detector sensors are arranged on the fixed rack, and the other two electric field detector sensors are arranged on the movable rack; one Langmuir probe is suspended between two sensors on a fixed gantry at equal intervals, and the other Langmuir probe and the retardation potential plasma analyzer are suspended between two sensors on a movable gantry; the stable ion source is positioned at one end of the experiment chamber, and the solar simulator is positioned on the side wall of the experiment chamber. The method can realize ground experiment verification, performance test and analysis evaluation of the space electric field detector.
Description
Technical Field
The invention relates to a test system and a test method for a ground plasma simulated environment experiment of a space electric field detector, in particular to a verification and test method for the ground plasma simulated environment experiment of the space electric field detector aiming at an ionosphere (ionosphere) satellite platform, belonging to the field of space physical research and space environment detection.
Background
The space electric field is an important parameter for researching space physics, space weather science and space environment. The space electric field detector is used for monitoring the state of a space electric field, not only can provide accurate basic data and background for application fields such as earthquake monitoring, radio wave propagation, thunderstorm monitoring and the like, improve monitoring, early warning and evaluation capacity for serious natural disasters, but also can provide observation data for the fields such as daily physical research, space weather research, weather forecast and the like, and provide space electromagnetic environment state data for space activities.
The space electric field detector senses and detects the electric potential or electric field information of the plasma environment through a sensor (a physical part) and obtains the electric potential or electric field information through measurement of a signal processing unit (an electronic part). In order to ensure the accurate reality of the electric field and the change information of the electric field in the track environment detected and obtained by the space electric field detector, the electronic performance indexes and the physical deviation of the space electric field detector need to be tested, quantitatively calibrated, analyzed and evaluated on the ground in advance; meanwhile, as a payload applied to an ionosphere satellite platform, the working principle, the operation mode, the function and the performance of the space electric field detector also need to be experimentally verified, tested, analyzed and evaluated under the condition of a ground simulated orbit plasma environment.
disclosure of Invention
In view of the above, the invention provides a ground plasma simulation environment experiment testing method for a space electric field detector based on a satellite orbit ionosphere plasma environment and a ground simulation experiment technology and according to the working principle, the functional performance requirements and the like of the space electric field detector.
The technical solution of the method of the invention is as follows:
A space electric field detector ground plasma simulation environment experiment test system mainly comprises a large-scale plasma experiment cabin, a Langmuir probe, a retarding potential plasma analyzer, an electric field detector sensor, a fixed rack, a movable rack, a stable ion source, a solar simulator, a space electric field detector signal processing unit, an electric field detector cable and space electric field detector ground detection equipment, wherein the Langmuir probe, the retarding potential plasma analyzer, the electric field detector sensor, the fixed rack and the movable rack are positioned in the experiment cabin; wherein,
Two space electric field detector sensors are symmetrically arranged on the fixed rack along the radial direction of the experiment chamber, the other two space electric field detector sensors are symmetrically arranged on the movable rack along the radial direction of the experiment chamber, and the four space electric field detector sensors are staggered with each other along the radial direction of the experiment chamber and have the same height in the vertical direction; one Langmuir probe is suspended between two space electric field detector sensors on a fixed rack at equal intervals, and the other Langmuir probe and the retardation potential plasma analyzer are suspended between two space electric field detector sensors on a movable rack;
The stable ion source is positioned at one end of the experiment cabin, the solar simulator is positioned on the side wall of the experiment cabin, the space electric field detector sensor is connected with the space electric field detector signal processing unit through an electric field detector cable, and the space electric field detector signal processing unit is further connected with the space electric field detector ground detection equipment.
Further, the radial effective size of the experimental cabin is larger than 60 lambdaDeffective longitudinal dimension greater than 100 lambdaDwherein λ isDIs the plasma debye length.
Furthermore, the distance between the two sensors arranged on the fixed rack is more than 20 lambdaDThe distance between two sensors mounted on the movable stage is greater than 30 lambdaDThe movable rack can move 40 lambda longitudinally along the experiment chamberD。
furthermore, the distance between the Langmuir probe and the two space electric field detector sensors suspended on the fixed rack is more than 10 lambdaDThe height of the two sensors in the vertical direction is the same.
Further, the distance between the Langmuir probe and the retarding potential plasma analyzer suspended on the movable rack is more than 10 lambdaDAnd the spacing between adjacent ones is greater than 10 lambdaD。
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, based on the plasmas in the ground simulation experiment cabin and the space potential distribution rule thereof, the ground plasma simulation environment experiment test system of the space electric field detector is constructed, and the system can effectively solve the key problems of ground plasma simulation environment experiment verification, performance test, analysis and evaluation and the like of the space electric field detector.
Drawings
FIG. 1 is a schematic diagram of a ground plasma simulation environment experiment testing system of a space electric field detector.
In the figure: 1-ion source, 2-plasma, 3-plasma experiment chamber, 4-solar simulator, 5-simulated solar irradiation light, 6-electric field detector sensor d, 7-Langmuir probe b, 8-retarding potential plasma analyzer, 9-electric field detector sensor b, 10-electric field detector sensor c, 11-Langmuir probe a, 12-electric field detector sensor a, 13-fixed rack, 14-reference platform, 15-movable rack, 16-electric field detector in-chamber cable, 17-vacuum wall socket, 18-electric field detector out-chamber cable, 19-electric field detector signal processing unit and 20-electric field detector ground detection equipment.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a space electric field detector ground plasma simulation environment experiment test system, which is mainly composed of a large-scale plasma experiment chamber 3, plasma diagnosis Langmuir probes 7 and 11, a retardation potential plasma analyzer 8, electric field detector sensors 6,9,10 and 12, a fixed rack 13, a movable rack 15, a reference platform 14, a stable ion source 1, a solar simulator 4, a space electric field detector signal processing unit 19, electric field detector internal cables 16(4 sets), electric field detector external cables 18(2 sets), a vacuum wall-penetrating socket 17 (2) and space electric field detector ground detection equipment 20, wherein the plasma diagnosis Langmuir probes 7 and 11, the retardation potential plasma analyzer 8, the electric field detector sensors 6,9,10 and 12 are positioned in the experiment chamber; wherein,
Two space electric field detector sensors 10 and 12 are symmetrically arranged on a fixed rack 13 along the radial direction of an experiment chamber, the other two space electric field detector sensors 6 and 9 are symmetrically arranged on a movable rack 15 along the radial direction of the experiment chamber, and the four space electric field detector sensors 6,9,10 and 12 are staggered with each other along the radial direction of the experiment chamber and have the same height in the vertical direction; one muir probe 11 is suspended at equal intervals between two space electric field detector sensors 10,12 on a fixed gantry 13, and the other muir probe 7 and retardation potential plasma analyzer 8 are suspended between two space electric field detector sensors 6,9 on a movable gantry 15; the fixed platform 13 and the movable platform 15 are both mounted on the reference platform 14;
The stable ion source 1 is positioned at one end of an experiment chamber and used for radiating plasma, the solar simulator 4 is positioned on the side wall of the experiment chamber and used for simulating solar irradiation light, the space electric field detector sensors 6,9,10 and 12 are connected with a vacuum wall-through socket 17 through electric field detector in-chamber cables 16, the vacuum wall-through socket 17 is connected with a space electric field detector signal processing unit 19 through electric field detector out-chamber cables 18, and the space electric field detector signal processing unit 19 is further connected with space electric field detector ground detection equipment 20.
The plasma environment simulation system of the space electric field detector is composed of a plasma source 1, a plasma experiment cabin 3, a solar simulator 4 and the like, and is used for truly and objectively simulating conditions such as creating a large-scale stable space electric field detector flight track plasma environment (main parameters are plasma density, electron temperature and ion temperature) and solar irradiation (main parameters are solar spectrum and solar constant) on the ground, so that the ground experiment verification and test evaluation effectiveness and reliability of the space electric field detector are guaranteed.
The invention is composed of sensors 6,9,10,12 of space electric field detector, signal processing unit 19, cables 16,18, etc. to form detection system, which can obtain the relative electric potential and electric field information and change of plasma environment in the simulated experiment cabin by in-situ detection, thereby verifying and testing and evaluating the function and performance index of space electric field detector in ground experiment.
The invention changes the plasma environment parameter, the bias current parameter, the simulated sunlight irradiation condition, the spatial relative position of the sensor (correspondingly changes the plasma environment and the electric field distribution), and the like, tests the relative coupling potential and the change of the single sensor, the radial symmetrical distribution sensor and the longitudinal distribution sensor of the electric field detector in the local plasma environment, detects and acquires the response of the electric field detector to the local electric field information and the change thereof, thereby comprehensively and systematically verifying and testing and evaluating the conformity of the principle of the plasma environment potential coupling of the sensor of the space electric field detector and the conformity of the response of the space electric field detector to the plasma environment, the bias current, the sunlight irradiation and the like, and further verifying and testing and evaluating the conformity and the correctness of the response of the electric field detector to the local electric field information and the change thereof.
The method specifically comprises the following steps:
the invention discloses a space electric field detector sensor, a sensor pair and a double-probe type in-situ detection system which are arranged and constructed in an experimental cabin and used for detecting local electric potential or electric field information. The single sensor of the electric field detector can be used for experimental verification, test and analysis of the principle of potential coupling in a plasma environment, relative local potential, plasma coupling impedance, bias current effect, solar irradiation photoelectron emission effect and the like; the electric field detector can be used for experimental test and analysis to evaluate the performance consistency of the electric field detector in plasma environment, such as potential coupling and the like; the electric field detecting instrument has two pairs of longitudinally distributed sensors to constitute two sets of double probes, and the two sets of double probe type electric field detecting systems, including the outer cable inside the cabin and the signal processing unit, may be used in experiment to verify, test and analyze the local electric field and its change in plasma environment, and may be used in experiment to test, analyze and evaluate the electric field measuring consistency of the two pairs of sensors.
The invention creates a stable space electric field detector flight track plasma environment in an experimental cabin, and adopts an extravehicular solar simulator to simulate the track solar irradiation environment conditions (only applied to the experimental verification and test of a single sensor of the electric field detector).
The Langmuir probe and the retardation potential plasma analyzer are used for diagnosing and obtaining the environmental parameters and the changes of the plasma near the electric field detector sensor in the experiment cabin in real time.
The invention changes the plasma environment (parameters), bias current parameters, simulated solar irradiation conditions and the like for a single space electric field detector sensor, utilizes a space electric field detector signal processing unit and space electric field detector ground detection equipment to test the relative coupling potential and the plasma sheath impedance and the change thereof in the plasma environment, combines the diagnosed plasma environment parameters, verifies and analyzes the principle conformity of the potential coupling in the plasma environment, the bias current effect, the sunlight irradiation photoelectron emission effect and the like.
The invention changes plasma environment (parameters), bias current parameters and the like for the double sensors which are radially and symmetrically distributed on the space electric field detector, utilizes the signal processing unit of the space electric field detector and the ground detection equipment of the space electric field detector to test the relative coupling potential and the plasma sheath impedance and the change thereof in the plasma environment through experiments, and verifies and analyzes the function and performance consistency of the potential coupling, the sheath impedance and the change thereof and the like by combining the diagnosed plasma environment parameters.
For two pairs of sensors longitudinally distributed on an electric field detector, the relative position between the longitudinally distributed sensors is changed through a movable rack, so that the plasma environment (parameters) and the electric field distribution around the sensors are changed, the bias current parameters and the like are changed, a local electric field signal and the change thereof, which are obtained by the electric field detector in the plasma environment, are tested through experiments by utilizing an electric field detector signal processing unit and ground detection equipment, and the response of the electric field detector to the local electric field and the change thereof is verified and analyzed by combining the diagnosed plasma environment parameters; and comparing and verifying the consistency of the responses of the two pairs of sensors to the local electric field and the change thereof.
the construction and specific experimental process of the ground plasma simulation environment experiment testing system of the space electric field detector in the embodiment are as follows:
(1) The large-scale and stable ground plasma environment simulation experiment test environment is constructed, and generally, the radial (transverse) effective dimension of the simulation experiment chamber is required to be more than 60 lambdaD(λDis the plasma debye length), the longitudinal effective dimension is greater than 100 lambdaD(ii) a The ion source has good time stability within 2hWithin a scale, the standard deviation (RMS) of the plasma density or electron temperature in the experimental chamber is less than 2%; the spectrum of the solar simulator is AM1.0, the irradiation intensity can reach 1 solar constant, and the effective caliber is larger thanThe above-mentioned debye length λ of the plasmaDRepresented by the formula:
In the formula, epsilon0Is a vacuum dielectric constant, TeIs the plasma electron temperature, e is the electron charge amount, and n is the sheath plasma density.
(2) And constructing an in-situ detection system of the space electric field detector. In the simulation experiment chamber, 2 sensors (sensor a and sensor c) of the electric field detector are symmetrically arranged on a fixed rack along the radial direction (Y direction), and the distance between the sensors is more than 20 lambdaD(ii) a Another 2 sensors (sensor b and sensor d) spaced more than 30 lambda apartD(ii) a The corresponding sensors on the fixed rack and the movable rack are arranged in a radial staggered way, and the longitudinal (X-direction) distance of the fixed rack and the movable rack is more than 30 lambdaD(ii) a The heights of the 4 sensors (ball centers) in the vertical direction (Z direction) are the same, and the sensors are all positioned on the symmetrical horizontal cross section of the experiment chamber; the movable rack can move 40 lambda along the longitudinal directionDThe above. The electric field detector signal processing unit and the ground detection equipment are arranged outside the laboratory cabin. The longitudinally distributed sensors a and b form a group of double probes, the corresponding sensors c and d form another group of double probes, and the sensors, the cables and the signal processing unit inside the cabin form a double-probe type local electric field detection system.
(3) And constructing a plasma environment diagnosis system. In the simulation experiment chamber, the Langmuir probe a is suspended between (or arranged on a fixed rack) the electric field detector sensor a and the electric field detector sensor c at equal intervals, and the radial interval between the Langmuir probe a and the electric field detector sensor c is more than 10 lambdaDThe height of the sensor is the same as that of the two sensors in the vertical direction; suspending (or placing on a moving gantry) the retarding potential plasma analyzer and Langmuir probe b from the electric field detector sensorb and sensor d, the distance between the retarding potential plasma analyzer and Langmuir probe b is more than 10 lambdaDAnd the distance between the sensor b and the adjacent sensor b is more than 10 lambdaDThe distance between Langmuir probe b and its adjacent sensor d is greater than 10 lambdaDthe retardation potential plasma analyzer and langmuir probe b were at the same height as the two sensors in the vertical direction. The two Langmuir probes and the signal processing unit of the retarding potential plasma analyzer are arranged outside the experimental chamber.
(4) and creating a flight track plasma environment of the simulated space electric field detector in the experimental cabin. Starting an ion source, and diagnosing the environmental parameters of the plasma in the experiment chamber by adopting a Langmuir probe and a retardation potential plasma analyzer; adjusting the parameters of the ion source, and creating a stable space electric field detector flight track plasma environment in the experiment cabin. In general, the plasma environmental parameters range from:
Density of electrons ne≈5×109～5×1012ele./m3electron temperature TeApproximately equal to 500-5000K, and static ion temperature TiApproximately equal to 500-5000K, and drift state argon ion energy kTi12eV (k is boltzmann constant).
(5) And (5) carrying out experimental verification and test evaluation on the electric field detector sensor. The working principle of the electric field detector sensor is based on Mott-Smith and Langmuir Orbital Motion restriction Theory (OML). According to the theory, in the simulated plasma environment in the experimental chamber, the coupling potential and the sheath impedance of the spherical sensor of the electric field detector can be respectively expressed as follows:
In the formula, VefdCoupling potential, V, for a spherical sensor plasma environmentpFor plasma potential in the laboratory chamber, TiIs the plasma ion temperature, me、miRespectively electron and ion mass, upThe ion beam flow speed of the windward side of the spherical sensor, r is the radius of the spherical sensor, Ibfor sensing to sphere by signal processing unitApplying a bias current, I, to the surfacephemitting a photoelectric stream for a spherical sensor surface, RsIs the plasma sheath impedance of the spherical sensor.
For the electric field detector sensor d, changing plasma environment parameters, bias current parameters, simulating sunlight irradiation conditions and the like, testing the relative coupling potential of the electric field detector sensor in the plasma environment, the impedance of a plasma sheath layer and the change of the impedance of the plasma sheath layer in the plasma environment by using an electric field detector signal processing unit and ground detection equipment, and monitoring the plasma environment parameters and the change of the parameters around the sensor in the experimental chamber. According to the formula (2) and the formula (3), the principle conformity of the electric field detector sensor in the plasma environment of 'potential coupling', the bias current and sheath impedance change effect, the sunlight irradiation photoelectron emission effect and the like can be fully verified and analyzed by combining the diagnosed plasma environment parameters.
(6) And (5) verifying and testing and evaluating the consistency of the electric field detector sensor. For the electric field detector sensors a and c (or the sensors b and d) which are radially and symmetrically distributed in the experiment cabin, the plasma environment parameters, the bias current parameters and the like are changed, the electric field detector signal processing unit and the ground detection equipment are utilized to test the relative coupling potential and the plasma sheath impedance and the change thereof in the plasma environment, and the plasma environment parameters and the change thereof around the sensors in the experiment cabin are monitored. As the plasmas in the experimental chamber are considered to be in radial symmetrical distribution, the functions and performance consistency of the sensors a and c (or the sensors b and d) for analyzing the radial symmetrical distribution in the plasma environment, such as potential coupling, sheath impedance and change thereof, and the like can be fully verified by combining the diagnosed plasma environment parameters.
(7) And (4) electric field measurement of the electric field detector and consistency experimental verification and test evaluation of the electric field detector. According to the plasma and the bipolar diffusion theory thereof, the electric potential distribution of the plasma in the experimental chamber can be expressed by a boltzmann formula as follows:
in the formula, VpoIs the plasma potential at the reference point, neoAs electron density at the reference point, neIs the electron density.
According to the formula (4), when the plasma density distribution in the experimental chamber has a radial or axial gradient, the plasma space potential distribution in the experimental chamber has a corresponding radial or axial gradient, namely, a quasi-static electric field distribution exists. This can also be verified using the emission probe or langmuir probe test. In addition, because the ground plasma simulation experiment system is also a stable electromagnetic system, a plurality of alternating current electromagnetic signals with fixed frequency also exist in the plasma environment in the experiment chamber. Thus, "direct" and "alternating" electric field distributions exist in the simulated plasma environment created within the laboratory capsule.
The electric field detector sensor a and the sensor b which are longitudinally distributed form a group of double probes, the corresponding sensor c and the sensor d form another group of double probes, and the double probes, the cable and the signal processing unit inside the cabin form a double-probe type electric field detection system. The line direction electric field between the two probes (two sensors) can be given by the following formula:
In the formula,Is the direction electric field of the connecting line between the sensor a and the sensor b,Is a direction electric field, V, of a line between the sensor c and the sensor defd-a、Vefd-b、Vefd-c、Vefd-dRespectively sensor a, sensor b, sensor c and sensor d plasma environment coupling potential, La→bIs the distance between sensor a and sensor b, Lc→dIs a sensor c andThe distance between the sensors d.
changing bias current parameters, the spatial relative position of the sensors (moving a rack, correspondingly changing the plasma environment and electric field distribution) and the like, and adopting the constructed double-probe type electric field in-situ detection system to test the response of the electric field detection instrument to the local electric field information and the change of the connecting line direction (sensor a → sensor b, sensor c → sensor d) between the double sensors in the plasma environment in the experiment cabin. As plasmas in the experiment cabin are radially and symmetrically distributed, the functions and performance indexes of the electric field detector can be systematically verified, tested and evaluated in an experiment mode by combining the diagnosed plasma environment parameters and relative position parameters. Meanwhile, the response of two groups of probes (sensor pairs) to the information of the local electric field and the change of the local electric field is compared and tested, and the consistency of the performance of the double-probe type space electric field detector on the detection of the electric field and the like is verified, tested and evaluated through full experiments.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. a space electric field detector ground plasma simulation environment experiment test system is characterized by mainly comprising a large-scale plasma experiment cabin (3), plasma diagnosis Langmuir probes (7 and 11) positioned in the experiment cabin, a retardation potential plasma analyzer (8), space electric field detector sensors (6, 9,10 and 12), a fixed rack (13), a movable rack (15), a stable ion source (1) positioned outside the experiment cabin, a solar simulator (4), a space electric field detector signal processing unit (19), electric field detector cables (16 and 18) and space electric field detector ground detection equipment (20); wherein,
Two space electric field detector sensors (10, 12) are symmetrically arranged on a fixed rack (13) along the radial direction of the experiment chamber, the other two space electric field detector sensors (6, 9) are symmetrically arranged on a movable rack (15) along the radial direction of the experiment chamber, and the four space electric field detector sensors (6, 9,10, 12) are mutually staggered along the radial direction of the experiment chamber and have the same height in the vertical direction; one Langmuir probe (11) is suspended at equal intervals between two space electric field detector sensors (10, 12) on a fixed gantry (13), and the other Langmuir probe (7) and a retardation potential plasma analyzer (8) are suspended between two space electric field detector sensors (6, 9) on a movable gantry (15);
The stable ion source (1) is positioned at one end of the experiment chamber, the solar simulator (4) is positioned on the side wall of the experiment chamber, the space electric field detector sensors (6, 9,10 and 12) are connected with the space electric field detector signal processing unit (19) through electric field detector cables (16 and 18), and the space electric field detector signal processing unit (19) is further connected with the space electric field detector ground detection equipment (20).
2. the ground plasma simulation environment experiment testing system of the space electric field detector as claimed in claim 1, wherein the radial effective size of the experiment chamber is larger than 60 λDeffective longitudinal dimension greater than 100 lambdaDwherein λ isDIs the plasma debye length.
3. The ground plasma simulation environment experiment test system of the space electric field detector according to claim 2, wherein the distance between the two sensors mounted on the fixed rack (13) is more than 20 lambdaDThe distance between two sensors mounted on a movable stage (15) is greater than 30 lambdaDThe movable rack (15) can move 40 lambda along the longitudinal direction of the experiment chamberD。
4. The ground plasma simulation environment experiment testing system of the space electric field detector as claimed in claim 2, wherein the distance between the Langmuir probe (11) suspended on the fixed gantry (13) between the two space electric field detector sensors and the two sensors is greater than 10 λDThe height of the two sensors in the vertical direction is the same.
5. The ground plasma of the space electric field detector according to claim 2The experimental test system for the body simulation environment is characterized in that the distance between the Langmuir probe (7) and the retarding potential plasma analyzer (8) which are suspended on a movable rack (15) is more than 10 lambdaDThe distance between the retarding potential plasma analyzer (8) and the adjacent sensor is more than 10 lambdaDThe distance between the Langmuir probe (7) and the adjacent sensor is more than 10 lambdaD。
6. The ground plasma simulated environment experiment testing system of the space electric field detector according to claim 2, further comprising a reference platform (14), wherein the fixed rack (13) and the movable rack (15) are both mounted on the reference platform (14).
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| CN113917253B (en) * | 2021-09-13 | 2022-06-17 | 哈尔滨工业大学 | Near space plasma sheath environment ground simulation device and diagnosis method |
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| JP2012047548A (en) * | 2010-08-26 | 2012-03-08 | Chube Univ | Plasma electron density measurement probe and measuring instrument |
| CN102651300A (en) * | 2011-02-28 | 2012-08-29 | 中国科学院空间科学与应用研究中心 | Two-dimensional array type plasma parameter detecting device |
| CN103017820A (en) * | 2012-11-25 | 2013-04-03 | 中国航天科技集团公司第五研究院第五一〇研究所 | Test system for distribution characteristics of artificial plasmas |
| CN104260907A (en) * | 2014-09-04 | 2015-01-07 | 兰州空间技术物理研究所 | Magnetic field simulation system for plasma environmental simulation experiment |
| CN105067274A (en) * | 2015-07-20 | 2015-11-18 | 兰州空间技术物理研究所 | Electric propulsion spacecraft plume parameter acquisition method |
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