Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Test method for simulating neutron irradiation at different fluence rates

A test method and fluence rate technology, applied in the field of radiation test, can solve problems such as material and device performance degradation, displacement defects, etc., and achieve the effect of easy operation and simple steps

Active Publication Date: 2017-03-15
HARBIN INST OF TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to understand the problem that the displacement radiation damage generated by neutron irradiation is easy to form displacement defects, and then cause the performance degradation of materials and devices. The present invention provides a test method for simulating neutron irradiation with different fluence rates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Test method for simulating neutron irradiation at different fluence rates
  • Test method for simulating neutron irradiation at different fluence rates
  • Test method for simulating neutron irradiation at different fluence rates

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0027] Step 1. According to the neutron energy E to be simulated n and fluence rate Through Geant4 or SRIM software for simulation calculation, the theoretical calculation simulates the total displacement absorbed dose D generated by neutrons n ; Among them, D' n (E n ) is the displacement absorbed dose produced by one neutron;

[0028] Step 2. According to the following two conditions, select the type and fluence rate of heavy ions The degree of displacement damage obtained is the same as that of neutrons, that is, the total displacement absorbed dose D produced by the selected heavy ion irradiation I with D n equal;

[0029] Condition 1: The range of heavy ions is large enough, greater than twice the thickness of the material or the depth of the active region of the device;

[0030] Condition 2: On the premise of meeting the requirements of the heavy ion accelerator, the fluence rate of heavy ions at 10 4 ~10 9 ion / cm 2 Select within the range of s to make th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a test method for simulating neutron irradiation at different fluence rates, relates to irradiation tests of materials and devices, and aims to solve the problems that performances of the materials and the devices are degenerated as displacement radiation damage caused by neutron irradiation easily forms displacement defects. According to the method, types and the fluence rates of heavy ions are selected, the materials and the devices are irradiated by the aid of the selected heavy ions, so that displacement damage degree generated by the materials and the devices is as same as that generated by neutron irradiation at the fluence rate to be simulated, the irradiation range of the selected heavy ions is twice larger than the thickness of the materials or the depth of active areas of the devices, the range of the fluence rate of the selected heavy ions ranges from 104ion / cm<2>*s to 109 ion / cm<2>*s when the requirements of a heavy ion accelerator are met, the types of the heavy ions are selected in the range, and displacement absorption dose generated by one heavy ion is minimum. According to the test method, displacement defect states generated by neutron irradiation at different fluence rates are achieved based on heavy ion irradiation, and in-situ detection of performance degradation is achieved.

Description

technical field [0001] The invention relates to irradiation tests of materials and devices, in particular to a test method for simulating neutron irradiation at different fluence rates, and belongs to the field of nuclear science and technology. Background technique [0002] In the displacement radiation environment, under the same fluence condition, neutron irradiation with different fluence rates will cause different radiation damage to materials and devices. In particular, in the space radiation environment, the density of particles per unit time is different. When neutron irradiation is used to simulate space displacement damage, different fluence rates need to be used for simulation, so as to study the radiation damage degree of materials and devices under different fluence rate conditions. In practical applications, the typical value required for the neutron fluence rate range is 10 4 ~10 13 n / cm 2 between s. This has brought great challenges to the evaluation met...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N23/00G01R31/00G01R31/26
CPCG01N23/005G01R31/003G01R31/2608
Inventor 李兴冀杨剑群刘超铭马国亮
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com