Method and device for equivalently measuring terahertz wave transmission characteristics in plasma sheath

A technology of plasma sheath and transmission characteristics, which is applied in special data processing applications, instruments, electrical digital data processing, etc. It can solve the problems of weak terahertz wave energy and the inability to directly obtain experimental data of plasma sheath terahertz wave transmission characteristics. , to achieve the effect of increasing reliability

Active Publication Date: 2021-01-01
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve at least part of the above problems, to provide an equivalent measurement method and device for the transmission characteristics of terahertz waves in the plasma sheath,

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  • Method and device for equivalently measuring terahertz wave transmission characteristics in plasma sheath
  • Method and device for equivalently measuring terahertz wave transmission characteristics in plasma sheath
  • Method and device for equivalently measuring terahertz wave transmission characteristics in plasma sheath

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Embodiment 1

[0053] figure 1 It is a flowchart of an equivalent measurement method for the transmission characteristics of a terahertz wave in a plasma sheath according to an embodiment of the present invention. An equivalent measurement method for a transmission characteristic of a terahertz wave in a plasma sheath according to an embodiment of the present invention may include:

[0054] S101. Obtain the target plasma sheath electron density and its distribution by means of a Langmuir probe;

[0055] S102. Perform simulation modeling on the target plasma sheath according to the electron density and distribution thereof of the target plasma sheath, and simulate the target plasma sheath by using equivalent plasma generated by high-voltage discharge;

[0056] S103. Equivalently measure the transmission characteristics of the terahertz wave in the target plasma sheath according to the transmission characteristics of the terahertz wave in the equivalent plasma generated by the high-voltage dis...

Embodiment 2

[0076] Such as figure 2 As shown, the embodiment of the present invention also provides an equivalent measurement device for the transmission characteristics of terahertz waves in the plasma sheath, including:

[0077] The detection module 100 is configured to obtain the target plasma sheath electron density and its distribution by means of a Langmuir probe;

[0078] The simulation module 200 is configured to simulate and model the target plasma sheath according to the target plasma sheath electron density and its distribution, and simulate the target plasma sheath by using equivalent plasma generated by high-voltage discharge;

[0079] The processing module 300 is configured to equivalently measure the transmission characteristic of the terahertz wave in the target plasma sheath according to the transmission characteristic of the terahertz wave in the plasma generated by the high-voltage discharge.

[0080] In the embodiment of the present invention, the simulation module 2...

Embodiment 3

[0085] The embodiment of the present invention illustrates the equivalent measurement process of the terahertz wave transmission characteristics in the plasma sheath: the electron density and its distribution of the plasma sheath are obtained by the Langmuir probe method, and the electron density and distribution of the equivalent plasma device are obtained by the interferometric method. Its distribution, Abelian density inversion, terahertz wave time-domain spectral transmission measurement system for plasma equivalent transmission measurement.

[0086] (1) Langmuir probe method to obtain the electron density and distribution of the plasma sheath

[0087] Place the shell target of the warhead / return capsule in the high-enthalpy shock wind tunnel, set the air velocity in the wind tunnel according to the actual flight speed of the warhead / return capsule, and determine the appropriate air injection pulse time and duration, so that the warhead / A plasma sheath is created around ...

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Abstract

The invention provides a method and a device for equivalently measuring terahertz wave transmission characteristics in a plasma sheath. The method comprises the following steps: acquiring the electrondensity and distribution of a target plasma sheath in a Langmuir probe mode; carrying out simulation modeling on the target plasma sheath according to the electron density and distribution of the target plasma sheath, and simulating the target plasma sheath by adopting equivalent plasma generated by high-voltage discharge; and equivalently measuring the transmission characteristic of the terahertz wave in the target plasma sheath according to the transmission characteristic of the terahertz wave in the equivalent plasma generated by high-voltage discharge. The technical bottleneck that at present, terahertz wave energy is weak, and terahertz wave transmission characteristic experimental data in a plasma sheath cannot be directly obtained is solved. Therefore, the equivalent measurement ofthe transmission characteristics of the terahertz waves in the plasma sheath is fully carried out.

Description

technical field [0001] The invention relates to the technical field of terahertz wave transmission characteristics, in particular to an equivalent measurement method and device for terahertz wave transmission characteristics in a plasma sheath. Background technique [0002] When the electromagnetic wave encounters the plasma sheath during the propagation process, it is attenuated due to its absorption, and effects such as deflection, time delay, and phase shift occur. The measurement, control, communication and guidance of high-speed aircraft bring great difficulties. The fundamental reason why plasma can be invisible to radar waves is that the electric field of electromagnetic waves in the microwave band accelerates charged particles in the plasma, and the charged particles collide with neutral particles, thereby transferring the energy absorbed from microwave electromagnetic waves. Since the frequency of the terahertz wave is much higher than the oscillation frequency of ...

Claims

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Application Information

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IPC IPC(8): G06F30/25G06F30/28G06F30/15G06F113/08G06F119/14
CPCG06F30/25G06F30/28G06F30/15G06F2113/08G06F2119/14Y02E30/10
Inventor 孙金海蔡禾朱先立张旭涛包醒东邓浩川吴杰
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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