Correlated measuring method for ion average velocity of orienting plasma beam

A technology of plasma and average velocity, applied in radiation measurement, measuring device, X/γ/cosmic radiation measurement, etc., can solve the problems of low precision, cumbersome measurement process, large error, etc. The effect of simple process
CN100570400CInactive Publication Date: 2009-12-16HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2009-12-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A related measurement method for the average velocity of directional plasma beam ions, which relates to a method for measuring the average velocity of directional plasma beam ions with density fluctuation characteristics, in order to solve the problems of existing measurement methods such as large errors, cumbersome measurement process, inability to The problem of obtaining the average velocity change characteristics of ions on the order of microseconds. The method of the present invention consists of the following steps: Step 1, start the steady-state plasma engine and adjust to a stable discharge state; Step 2, adjust the positive bias power supply so that the voltages loaded on the two probes are respectively in the electron current saturation region Step 3, start the oscilloscope, adjust and make it possible to display a clear low-frequency oscillation signal on the oscilloscope; Step 4, record the data signals of the two probes in the same time period of the steady-state plasma engine in a stable working state; Step 5 1. Find the time difference when the correlation between the signals of the two probes is the strongest; Step 6. Calculate the ion average velocity of the directional plasma beam according to the formula Vi=L / Δτ.
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Description

technical field

[0001] The invention relates to a method for measuring the average velocity of ions in a directional plasma beam with density fluctuation characteristics. Background technique

[0002] Oriented plasma beams have been widely used in the fields of etching and aerospace propulsion. The average ejection velocity of ions is one of the important indicators of oriented plasma, but its measurement has always been a difficult problem, especially its dynamic characteristics.

[0003] Steady-state plasma engine (SPT) is a kind of electric propulsion device, which is widely used in high-orbit satellite attitude maintenance, orbit transfer, deep space exploration and other fields. SPT heats electrons by an electric field to ionize an inert gas as a working medium, and the formed plasma is accelerated by an electric field to form a high-speed directional plasma jet, and its specific impulse (that is, the average ejection speed of ions relative to the device) can reach 2000...

Claims

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