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Method and structure for collecting tiny dust particles

A collection method and dust technology, which are applied in the field of charge-to-mass ratio measurement of dust on the surface of space remote sensing detectors and other spacecraft, can solve the problems of inaccurate collection of tiny dust particles, achieve stable and reliable test process, reduce use risks, and improve The effect of sensitivity

Inactive Publication Date: 2011-09-07
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical solution of the present invention is to provide a method and structure for collecting tiny dust particles, which solves the problem that tiny dust particles cannot be accurately collected in the orbital environment of my country's existing spacecraft during thermal vacuum tests and on-orbit operations of spacecraft

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  • Method and structure for collecting tiny dust particles
  • Method and structure for collecting tiny dust particles

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Embodiment Construction

[0031] Such as figure 1 As shown, the device structure of a kind of tiny dust particle collecting method and structure that the present invention adopts comprises: collimation grid plate 1, particle to be measured 2, hollow columnar capacitor 3, photomultiplier tube signal amplifier 4, external capacitor 5, quartz crystal The micro balance 6, the electrode 7, the fixed support 8, and the vacuum chamber 9 are composed.

[0032]Placed in the vacuum chamber 9 are: collimating grid plate 1, particles to be measured 2, hollow cylindrical capacitor 3, quartz crystal microbalance 6, electrodes 7, and fixed bracket 8; the fixed bracket 8 is composed of two symmetrical inverted knife structures, It is placed on the bottom of the vacuum chamber 9 along the central axis of the vacuum chamber 9, and there is a gap in the middle. A quartz crystal microbalance 6 is placed along the central axis in the gap, and the two poles of the quartz crystal microbalance 6 are connected to the positive ...

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Abstract

The invention discloses a method and structure for collecting tiny dust particles and provides a method and structure for collecting tiny dust particles from a spacecraft orbit environment. By adopting the method, the charge-mass ratio of tiny dust particles can be measured quantitatively under the condition of simulating the spacecraft orbit environment, and the national mass in-situ monitoring sensitivity is increased to 1.10*10<-9> to 4.42*10<-9> g / cm<2>; a dust particle charge-mass ratio testing instrument is simple in structural design and mainly comprises a circular grid plate, a hollow cylindrical capacitor and a QCM (Quartz Crystal Microbalances), so that the accuracy of measured data is greatly increased in the testing process and the load using risk of a spacecraft orbit is lowered; in the method, the hollow cylindrical capacitor is used, the design size of the instrument is reduced and a signal acquisition circuit and an assembly box are used, so that the charge-mass ratio of tiny dust particles is well measured and the testing process is stable and reliable; and due to the adoption of the QCM, the mass change of passing particles is well measured, the testing process is stable and reliable and high reproducibility is achieved. The method and the structure have the characteristic of in-situ monitoring of the charge-mass ratio of particles in the spacecraft orbit environment, and are suitable for scale test, production, research and the like.

Description

technical field [0001] The invention relates to a method and structure for collecting tiny dust particles. The technology belongs to the field of aerospace technology and is directly applied to the measurement of the charge-to-mass ratio of dust on the surface of space remote sensing detectors and other spacecraft. Background technique [0002] In recent years, plasma dust research is one of the active subfields of plasma science. Charged dust widely exists in many different environments such as space plasma, laboratory fusion devices, and low-temperature plasma industrial applications, and presents the same or similar properties. This is a partially or fully ionized plasma whose basic constituents, in addition to electrons and ions, are (usually) negatively charged particles whose charge is not constant. Charged particles have completely different dynamic behaviors from electrons and ions, and their interactions with plasma present many new physical phenomena. The interac...

Claims

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Application Information

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IPC IPC(8): G01N1/10
Inventor 颜则东柏树田恺马亚莉
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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