Ionization gauge and system for measuring the transient pressure of a high velocity neutral air mass
A technology of ionization gauge and air mass, which is applied in the field of plasma experiments, can solve the problems of inability to accurately measure the transient pressure of neutral air mass at high speed, and achieve the effect of wide-range pressure measurement, good detection accuracy, and multi-purpose.
Active Publication Date: 2021-01-05
NAT UNIV OF DEFENSE TECH
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[0005] The invention provides an ionization gauge and a system for measuring the transient pressure of a high-speed neutral air mass with the ionization gauge, so as to solve the problem that the existing ionization gauge cannot accurately measure the transient pressure of a high-speed neutral air mass technical issues
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[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.
[0034] Such as image 3 As shown, the preferred embodiment of the present invention provides an ionization gauge for measuring the transient pressure of a high-velocity neutral air mass, the ionization gauge includes a cathode 1 for emitting electrons, an adjustable The electric field is used to stabilize the control pole 2 of the emission current of the cathode 1, the acceleration pole 3 for accelerating electrons, the collector pole 4 for collecting the ion flow and the electrode mounting seat 5 for fixing, the cathode 1, the control pole 2. The accelerating pole 3 and the collecting pole 4 are coaxially installed on the electrode mounting base 5. From the inside to the outside, they are the cathode 1, the control pole 2, the accelerating pole 3 and the collecti...
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The present invention discloses an ionization gauge and a system for measuring the transient pressure intensity of high-speed indifferent air mass. According to the ionization gauge and the system, acathode, a control pole, an accelerating pole and a collecting pole are coaxially arranged and distributed sequentially from inside to outside; the working potential of each electrode is controlled through an external control circuit, so that the cathode operates under a space charge limited operation condition; the emission capacity of the cathode is significantly affected by an electric field where the cathode is located, and is not sensitive to temperature changes; the adjustment of the electric field is devoid of inertias, and is quick in response, and therefore, the emission current of the cathode can be quickly and accurately stabilized, and it can be ensured that the ionization gauge has good detection accuracy for the transient pressure intensity of the high-speed indifferent air mass; in addition, the working potential of each electrode can be adjusted by the external control circuit, and the switching of the high-vacuum measurement mode and the low-vacuum measurement mode ofthe ionization gauge can be realized, and a wide range of pressure intensity measurement can be realized, and the multi-purpose application of the ionization gauge can be realized.
Description
technical field [0001] The invention relates to the technical field of pulsed plasma experiments, in particular to an ionization gauge and a system for measuring the transient pressure of a high-speed neutral air mass. Background technique [0002] In the pulsed plasma experiment, a certain mass of working fluid needs to be injected into the vacuum environment in a pulsed manner to form a certain distribution, and then a pulsed electromagnetic field is applied to form the required plasma. In this process, the gas working medium distribution has an important influence on the formation and properties of plasma, and it is an important parameter that must be mastered in pulsed plasma experiments, which requires the ability to measure the transient pressure of neutral gases. Usually, the measurement of molecular number density (convertible into pressure) of neutral gas can consider laser interferometry, laser induced fluorescence method, electron beam fluorescence method, electro...
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IPC IPC(8): G01L21/30
Inventor 郭大伟程谋森张颖吴建军王墨戈李小康杨雄车碧轩段兴跃
Owner NAT UNIV OF DEFENSE TECH