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A device for measuring the dynamic characteristics of the charge on the wall of the discharge chamber of the ion thruster

A discharge chamber and wall technology, applied in the field of plasma diagnosis, can solve the problem of high measurement cost

Active Publication Date: 2021-07-06
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the document "American Institute of Aeronautics and Astronautics, 2004:3613", a probe mobile platform device based on the high-speed probe positioning system (HARP) is introduced. The system positioning is accurate, but the measurement cost is high

Method used

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  • A device for measuring the dynamic characteristics of the charge on the wall of the discharge chamber of the ion thruster
  • A device for measuring the dynamic characteristics of the charge on the wall of the discharge chamber of the ion thruster

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] The invention provides a device for measuring the dynamic characteristics of the charge on the wall surface of the ion thruster discharge chamber, such as figure 1 As shown, it includes: a Langmuir plane probe 2 , a probe scanning power supply 13 and a data acquisition system 14 . figure 2 The specific structure of the Langmuir plane probe 2 is shown, which is composed of a plane probe 15 , a grub screw 19 , a ceramic cylinder 16 , a flat washer 17 and a nut 18 .

[0027] The present invention uses a planar probe as the detection front end, and the planar probe is a kind of Langmuir probe, which uses the electrostatic effect of the conductor in the plasma environment to obtain the volt-ampere characteristic curve of the probe in the plasma environment through experiments , and get the plasma density, temperature, electric potential and other param...

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Abstract

The invention discloses a device for measuring the dynamic characteristics of electric charges on the wall surface of an ion thruster discharge chamber. In the device, a Langmuir plane probe is arranged at a selected detection position on the wall near a magnetic pole shoe; the Langmuir plane probe is composed of a plane probe Composed of needles, flat-head screws, ceramic cylinders, flat washers and nuts; flat probes are welded on the head of the flat-head screws, and the screw rods of the flat-head screws protrude through the ceramic cylinders set at the selected detection positions, penetrating the anode wall and the screen cylinder The outside of the screen cylinder of the discharge chamber is fixed by nuts; there are flat washers between the head of the flat head screw and the ceramic cylinder and between the nut and the ceramic cylinder; the plane probe does not directly contact the anode wall; the outside of the screen cylinder The screw rod is connected to the probe scanning power supply and the signal line of the data acquisition system. The invention has lower cost, higher diagnosis accuracy and less interference of the probe to the plasma.

Description

technical field [0001] The invention relates to the technical field of plasma diagnosis, in particular to a device for measuring the dynamic characteristics of charges on the anode wall surface of an ion thruster discharge chamber. Background technique [0002] The discharge chamber is the core component of the Kaufman-type ion thruster, and it is the area where the ion thruster maintains the discharge and generates plasma. When the discharge chamber is working, the different types of particles in the discharge chamber perform complex movements and collisions under the action of various physical fields, resulting in the complexity of the plasma environment inside the discharge chamber. Carrying out the plasma diagnosis work on the anode wall of the ion thruster discharge chamber is helpful for in-depth understanding of the physical movement process of the discharge plasma at the wall, and can also provide a basis for studying the performance consistency, discharge stability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/12G01R29/24G01R29/00
Inventor 顾左宋莹莹王蒙赖承祺郭伟龙吴辰宸
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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