1、 IEC/TS 62396-5Edition 1.0 2008-08TECHNICAL SPECIFICATION Process management for avionics Atmospheric radiation effects Part 5:Guidelines for assessing thermal neutron fluxes and effects in avionics systems IEC/TS 62396-5:2008(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOC
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11、spheric radiation effects Part 5:Guidelines for assessing thermal neutron fluxes and effects in avionics systems INTERNATIONAL ELECTROTECHNICAL COMMISSION RICS 03.100.50;31.020;49.060 PRICE CODEISBN 2-8318-9959-1 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON
12、 Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 62396-5 IEC:2008(E)CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Overview of thermal neutron single event rate calculation.5 5 Thermal neutron flux inside an airl
13、iner.6 5.1 Definition of thermal neutron.6 5.2 Overview.7 5.3 Background on aircraft measurements.7 5.4 Calculational approach.8 5.5 Processing of in-flight neutron flux data.9 6 Thermal neutron SEU cross sections.12 6.1 Overview of the issue.12 6.2 Mechanism involved.13 6.3 Thermal neutron SEU cros
14、s sections and Ratio-2.14 7 Recommendation for devices in avionics at present time.16 Bibliography.17 Figure 1 Atmospheric neutron spectra measured in four aircraft.9 Table 1 Tabulation of the various atmospheric neutron measurements used.9 Table 2 Comparison of thermal and high energy neutron fluxe
15、s and their ratios.11 Table 3 Calculated neutron fluxes in the Boeing 747 structure.12 Table 4 SRAM SEU cross sections induced by thermal and high energy neutrons.15 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TS 62396-5 IEC:2008(E
16、)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PROCESS MANAGEMENT FOR AVIONICS ATMOSPHERIC RADIATION EFFECTS Part 5:Guidelines for assessing thermal neutron fluxes and effects in avionics systems FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC National Committees).The object of IEC is to promote international co-operation on all questions concerning standardization in the electric
