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Method for calculating radiation sensitive part displacement absorption dose based on absorption dose depth distribution

A technology of absorbed dose and depth distribution, applied to dosimeters and other directions, can solve the problems of complex calculation of absorbed dose and long time consumption, and achieve the effect of fast calculation speed, simple steps and easy operation

Inactive Publication Date: 2018-08-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of complex and time-consuming calculation of displacement absorbed dose of radiation-sensitive parts in the prior art, the present invention provides a method for calculating displacement absorbed dose of radiation-sensitive parts based on absorbed dose depth distribution

Method used

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  • Method for calculating radiation sensitive part displacement absorption dose based on absorption dose depth distribution
  • Method for calculating radiation sensitive part displacement absorption dose based on absorption dose depth distribution
  • Method for calculating radiation sensitive part displacement absorption dose based on absorption dose depth distribution

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specific Embodiment approach 1

[0026] Specific implementation mode one: combine figure 1 , figure 2 , image 3 , Figure 4 To describe this embodiment, the method for calculating the displaced absorbed dose of radiation-sensitive parts based on the absorbed dose depth distribution given in this embodiment specifically includes the following steps:

[0027] Due to the different specific structures, the unidirectional absorbed dose depth distribution will lead to different effects. Different types of incident particles (especially different types of charged particles) will simultaneously generate ionization and displacement damage during the transportation of materials and devices. When displacement radiation damage occurs, a large number of interstitial atom-vacancy pairs will be caused instantaneously. In order to accurately calculate the depth distribution of the displaced absorbed dose, it is necessary to consider the incident particles as normal incidence, such as figure 1 shown.

[0028] Step 1. ...

specific Embodiment approach 2

[0038] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 5, the equivalent thickness x of region i i The calculation process is:

[0039]

[0040] where ρ j Indicates the density of the jth material, t j Indicates the thickness of the jth material, j∈[1,M].

[0041] Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0042] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step seven, D(x i ) into equivalent thickness x i The corresponding one-way absorbed dose D'(x i ) The specific process is:

[0043] D'(x i )=D(x i ) / 4π.

[0044] Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for calculating the radiation sensitive part displacement absorption dose based on absorption dose depth distribution, and belongs to the technical field of space environment effect, nuclear science and application. The method includes selecting a material with known one-dimensional displacement absorption dose depth distribution, converting the displacement absorption dose depth distribution into the absorption dose equivalent thickness distribution; performing the area division on the structure where the radiation sensitive part is located, determining the types of materials in each region and the thickness of each material; and then converting the thickness of the material in each region into the equivalent thickness, determining the absorption dose of each equivalent thickness and the one-way absorption dose, and finally, calculating and obtaining the displacement absorption dose of the sensitive part in the structure. The problems that a radiation sensitive part of the prior art is complex in displacement absorption dose calculation and long in time consumption are solved. The method can be used for rapidly evaluating the displacement absorptiondose of complex structures such as a spacecraft.

Description

technical field [0001] The invention relates to a method for calculating the displacement absorbed dose of a radiation-sensitive part, and belongs to the technical fields of space environment effect, nuclear science and application. Background technique [0002] Absorbed dose refers to the energy absorbed by a unit mass of material after being irradiated. The strict definition of absorbed dose is the quotient obtained by dividing the average energy dE given by radiation to a material with a mass of dm divided by dm. It is represented by the symbol D and the unit is Gray ( Gy). Spacecraft orbiting in space will be affected by various environmental factors, such as particle radiation, microgravity, and atomic oxygen. With the rapid development of electronic technology, the application of electronic components is becoming more and more extensive. Electronic devices are widely used in satellites, spacecraft and space shuttles to achieve various functions. For electronic devic...

Claims

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Application Information

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IPC IPC(8): G01T1/02
CPCG01T1/02
Inventor 李兴冀杨剑群刘超铭吕钢董尚利
Owner HARBIN INST OF TECH
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