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Device and method for instantaneous measurement of ion velocity distribution function

A distribution function and ion velocity technology, which is applied in the field of instantaneous measurement devices for ion velocity distribution functions, can solve problems such as the inability to measure ion distribution functions in real time, and achieve the effects of measurement, accurate measurement results, and simple device structure

Inactive Publication Date: 2014-07-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing multi-gate probe measurement method needs to continuously change the adjustable voltage to measure the current to describe the ion distribution function, and cannot measure the ion distribution function in real time, and provides an instantaneous measurement device for the ion velocity distribution function and methods

Method used

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  • Device and method for instantaneous measurement of ion velocity distribution function
  • Device and method for instantaneous measurement of ion velocity distribution function
  • Device and method for instantaneous measurement of ion velocity distribution function

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specific Embodiment approach 1

[0021] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the ion velocity distribution function instantaneous measuring device described in this embodiment, it comprises DC power supply 1, magnetic field coil 2 and charge collection plate 3,

[0022] DC power supply 1 is used to provide accelerating electric field for particles;

[0023] The magnetic field coil 2 is used to provide a deflection magnetic field for the particles accelerated by the accelerating electric field;

[0024] The charge collecting plate 3 is arranged at the end side of the magnetic field coil 2, and is used for collecting the moving particles whose moving direction is changed by the deflection magnetic field.

specific Embodiment approach 2

[0025] Specific implementation mode two: the following combination figure 1 This embodiment will be described. This embodiment will further describe Embodiment 1. In this embodiment, a plurality of particle collection regions are uniformly arranged on the charge collection plate 3 , and adjacent particle collection regions are electrically isolated.

[0026] In this embodiment, if figure 1 As shown, in the region of the accelerating electric field, the positively charged particles Accelerated by the electric field to obtain a certain initial velocity into the deflection magnetic field area, and the negatively charged particles It will be returned to the original position by the force of the electric field.

[0027] In the deflection magnetic field area, a magnetic field perpendicular to the direction of the paper is added through the N and S pole coils. In the magnetic field, the charged particles will undergo Larmor gyromotion and deflect.

[0028] The positively charg...

specific Embodiment approach 3

[0029] Specific implementation mode three: the following combination Figure 1 to Figure 3 Describe this embodiment. This embodiment is a method for instantaneous measurement of ion velocity distribution function, which is realized based on the instantaneous measurement device for ion velocity distribution function described in Embodiment 1 or 2.

[0030] After the positively charged particles are accelerated by the accelerating electric field provided by the DC power supply 1, they enter the deflection magnetic field provided by the magnetic field coil 2. After the direction of movement is deflected, they move to different particle collection areas on the charge collection plate 3, and the charge collection plate 3. The currents sensed by different particle collection areas on the 3. obtain the particle beam current density at different positions, thereby obtaining the real-time ion velocity distribution function.

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Abstract

The invention discloses a device and method for instantaneous measurement of an ion velocity distribution function and belongs to the technical field of measurement of ion velocity distribution functions. The device and method for instantaneous measurement of the ion velocity distribution function aim to solve the problem that according to an existing multi-grid probe measurement method, in order to depict an iron distribution function, current is measured by continuously changing the adjustable voltage, and thus the iron distribution function cannot be measured in real time. According to the device for instantaneous measurement of the ion velocity distribution function, a direct-current power supply supplies an accelerating field to particles, a magnetic field coil provides a magnetic deflection field for the particles which are accelerated through the accelerating field, and a charge collection plate collects the moving particles with the moving direction changed through the magnetic deflection field. According to the method for instantaneous measurement of the ion velocity distribution function, the current density of particle beams at different positions is obtained through currents sensed by different particle collection areas on the charge collection plate, and thus the real-time ion velocity distribution function is obtained. The device and method are used for instantaneous measurement of the ion velocity distribution function.

Description

technical field [0001] The invention relates to an instantaneous measuring device and method for an ion velocity distribution function, and belongs to the technical field of ion velocity distribution function measurement. Background technique [0002] Plasma is a form of matter with free electrons and charged ions as the main components. When the gas is continuously heated, the molecules are decomposed into atoms and ionized, forming a gas composed of ions, electrons and neutral particles. The gaseous state is called plasma. [0003] A magnetic field is a special substance that has a magnetic force on a magnet placed in it. Its basic feature is that it can exert a force on moving charges, that is, a current-carrying conductor or a moving charged particle can be subjected to the force of a magnetic field in a magnetic field. The acting force is called the Lorentz force, and its magnitude and direction are given by the formula decision, where is the Lorentz force on the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/42
Inventor 王春生邹佳荣
Owner HARBIN INST OF TECH
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