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Method for simulating spatial energy spectrum environment by using single energy electron beam

A technology for simulating space and electron beams, applied in environmental/reliability testing, measuring electricity, measuring electrical variables, etc., it can solve the problems of reduced accuracy of ground simulation tests, inability to accurately simulate the characteristics of space plasma energy spectrum distribution, etc. The effect of accuracy

Inactive Publication Date: 2017-09-29
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

However, in the ground simulation test, it is hoped that an electron gun can be used to simulate the distribution characteristics of the space plasma energy spectrum, but since the electron gun can only produce a single-energy electron beam, it cannot accurately simulate the distribution characteristics of the space plasma energy spectrum, resulting in the accuracy of the ground simulation test. reduce

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  • Method for simulating spatial energy spectrum environment by using single energy electron beam
  • Method for simulating spatial energy spectrum environment by using single energy electron beam
  • Method for simulating spatial energy spectrum environment by using single energy electron beam

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Embodiment Construction

[0048] The invention provides a method for simulating a space energy spectrum environment by using a monoenergetic electron beam. The elements of the distributed plasma, the energy of the single-energy beam and the selection parameters of the beam current density are obtained through calculation, and the description of the plasma environment characteristics of the spatial energy spectrum is realized more accurately.

[0049] Specifically, the program includes the following steps:

[0050] Step 1. Determine the plasma distribution function and related parameters in the GEO orbit space.

[0051] In this embodiment, the GEO orbital space plasma is represented by a single Maxwell distribution function, and the expression of the function is as follows:

[0052]

[0053] In the formula, n, m, T, v are particle density, mass, temperature and velocity, respectively. k is Boltzmann's constant. The relevant parameters here are n, m, T, v, which are given known data du...

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Abstract

The invention discloses a method for simulating a spatial energy spectrum environment by using a single energy electron beam. The method comprises: a spatial plasma distribution function and a velocity element of the distribution function of a GEO orbit are determined; expression relationships between characterization parameters and the velocity element of a single energy electron beam and plasma are established respectively; a matching equation is established by using velocity element identity as a matching target according to a plasma characterization parameter value of a to-be-simulated spatial energy spectrum environment, the equation is solved to obtain the density and velocity of the single energy electron beam for simulating the spatial energy spectrum environment, and then the energy and beam current density of the single energy electron beam are obtained by transform. According to the invention, the velocity elements of the single energy electron beam and the spatial energy spectrum distribution plasma are matched and the energy and beam current density selection parameters of the single energy electron beam are obtained by calculation, so that description of spatial energy spectrum plasma environment characteristics is realized accurately and the support is provided for improving accuracy of the satellite charging-discharging effect ground simulation test.

Description

technical field [0001] The invention belongs to the technical field of GEO orbit satellite charging and discharging effect simulation tests, and in particular relates to a method for simulating a space energy spectrum environment by using a single-energy electron beam. Background technique [0002] The interaction between space plasma environment and spacecraft surface materials will produce surface charge and discharge effects, and the induced electrostatic discharge will lead to electromagnetic interference, surface material performance degradation, and failure of sensitive components. Both at home and abroad have been actively studying the simulation test technology that affects the interaction between plasma and spacecraft, using low-temperature plasma sources to simulate the low-orbit plasma environment in space, or using electron guns to simulate the plasma environment in Geosynchronous Orbit (GEO). [0003] The energy and density distribution range of space plasma is ...

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/003
Inventor 陈益峰秦晓刚杨生胜史亮王俊柳青汤道坦李得天
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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