Space Radiation Effects on Electronics: Simple Concepts and New Challenges

Total Page:16

File Type:pdf, Size:1020Kb

Space Radiation Effects on Electronics: Simple Concepts and New Challenges Space Radiation Effects on Electronics: Simple Concepts and New Challenges Kenneth A. LaBel [email protected] Co-Manager, NASA Electronic Parts and Packaging (NEPP) Program Group Leader, Radiation Effects and Analysis Group (REAG), NASA/GSFC Project Technologist, Living With a Star (LWS) Space Environment Testbeds (SET) Outline • The Space Radiation Environment • The Effects on Electronics • The Environment in Action • NASA Approaches to Commercial Electronics – The Mission Mix – Flight Projects – Proactive Research • Final Thoughts Atomic Interactions – Direct Ionization Interaction with Nucleus – Indirect Ionization http://www.stsci.edu/hst/nicmos/performance/anomalies/bigcr.html – Nucleus is Displaced 2 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 The Space Radiation Environment STARFISH detonation – Nuclear attacks are not considered in this presentation Space Environments and Related Effects Micro- Plasma Particle Neutral Ultraviolet meteoroids & radiation gas particles & X-ray orbital debris Ionizing & Single Surface Charging Drag Impacts Non-Ionizing Event Erosion Dose Effects •Biasing of •Degradation •Data •Torques •Degradation •Structural instrument of micro- corruption •Orbital of thermal, damage • electrical, readings electronics •Noise on decay •Decompression optical •Degradation Images •Pulsing properties of optical •System •Power •Degradation components shutdowns drains of structural •Degradation •Physical •Circuit integrity of solar cells damage damage after Barth Space Radiation Effects 4 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 Space Radiation Environment Galactic Cosmic Rays (GCRs) IC after Nikkei Science, Inc. M of Japan, by K. Endo A Solar Protons & N HeaviYer Ions D Trapped Particles Protons, Electrons, Heavy Ions Deep-space missions may also see: neutrons from background or radioisotope thermal generators (RTGs) or other nuclear source Atmosphere and terrestrial may see GCR and secondaries 5 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 Sunspot Cycle: An Indicator of the Solar Cycle after Lund Observatory 300 Cycle 19 Cycle 20 Cycle 21 Cycle 22 250 Cycle 18 s r e 200 b m u 150 N t o 100 p s n u 50 S 0 1947 Years 1997 Length Varies from 9 - 13 Years 7 Years Solar Maximum, 4 Years Solar Minimum 6 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 Solar Particle Events Holloman AFB/SOON • Cyclical (Solar Max, Solar Min) – 11-year AVERAGE (9 to 13) – Solar Max is more active time period • Two types of events – Gradual (Coronal Mass Ejections – CMEs) • Proton rich – Impulsive (Solar Flares) • Heavy ion rich • Abundances Dependent on Radial Distance from Sun • Particles are Partially Ionized – Greater Ability to Penetrate Magnetosphere than GCRs 7 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 Solar Proton Event - October 1989 Proton Fluxes - 99% Worst Case Event 1 0 5 1 0 4 V 1 0 3 e 2 M / 1 0 r e 1 t 1 0 s / 0 s 1 0 / 2 -1 m 1 0 c / -2 s 1 0 t n -3 u 1 0 o -4 C 1 0 2 0 0 0 T -2 0 0 1 5 1 7 1 9 2 1 2 3 2 5 2 7 2 9 3 1 2 4 6 8 1 0 1 2 1 4 n 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 1 3 5 7 9 1 1 1 3 1 5 O cto b e r N o ve m b e r GOES Space Environment Monitor 8 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 Free-Space Particles: Galactic Cosmic Rays (GCRs) or Heavy Ions • Definition – A GCR ion is a charged particle CREME 96, Solar Minimum, 100 mils (2.54 mm) Al (H, He, Fe, etc) 4 103 – Typically found in free space ) y 102 Z = 2 - 92 (galactic cosmic rays or GCRs) a 10 d / 1 • Energies range from MeV to 2 100 m c 10 GeVs for particles of concern / -1 # 10 for SEE ( -2 e 10 • Origin is unknown c -3 n 10-4 e GEO u 10 – Important attribute for impact l -5 GTO F 10 on electronics is how much -6 MEO T 10 EOS E -7 energy is deposited by this L LEO 10-8 -1 0 1 2 particle as it passes through a 1010 10 10 10 semiconductor material. This LET (MeV-cm2/mg) is known as Linear Energy Transfer or LET (dE/dX). Time Commercial Technology Sensitivity 9 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 Trapped Particles in the Earth’s Magnetic Field: Proton & Electron Intensities AP-8 Model AE-8 Model Ep > 10 MeV Ee > 1 MeV #/cm2/sec #/cm2/sec 4 A di3p in th2e eart1h’s dipole m1omen2t caus3es an4 asym5metry6 in th7e pictu8re ab9ove:10 The South Atlantic Anomaly (SAA) L-Shell 10 Space Radiation Effects on Electronics presented by Kenneth A. LaBel at 2004 MRS Fall Meeting, Boston, MA – Nov 29, 2004 SAA and Trapped Protons: Effects of the Asymmetry in the Proton Belts on SRAM Upset Rate at Varying Altitudes on CRUX/APEX H ita c h i 1 M :A ltitu d e :6 5 0 k m - 7 5 0 k m H ita c h i 1 M :A ltitu d e :1 2 5 0 k m - 1 3 5 0 k m 9 0 9 0 7 5 7 5 6 0 U p s ets/B it/D ay 6 0 U p s e ts /B it/D a y 1 .0 E -7 to 5 .0 E -7 1 .0 E -7 to 5 .0 E -7 5 .0 E -7 to 1 .0 E -6 4 5 5 .0 E -7 to 1 .0 E -6 4 5 1 .0 E -6 to 5 .0 E -6 1 .0 E -6 to 5 .0 E -6 5 .0 E -6 to 1 .0 E -5 5 .0 E -6 to 1 .0 E -5 1 .0 E -5 to 5 .0 E -5 3 0 1 .0 E -5 to 5 .0 E -5 3 0 5 .0 E -5 to 1 .0 E -4 5 .0 E -5 to 1 .0 E -4 1 .0 E -4 to 5 .0 E -4 1 .0 E -4 to 5 .0 E -4 e 1 5 5 .0 E -4 to 1 .0 E -3 e 1 5 5 .0 E -4 to 1 .0 E -3 d d 1 .0 E -3 to 5 .0 E -3 1 .0 E -3 to 5 .0 E -3 u t u i 0 t t i 0 t a a L L -1 5 -1 5 -3 0 -3 0 -4 5 -4 5 -6 0 -6 0 -7 5 -7 5 -9 0 -9 0 -1 8 0 -1 5 0 -1 2 0 -9 0 -6 0 -3 0 0 3 0 6 0 9 0 1 2 0 1 5 0 1 8 0 -1 8 0 -1 5 0 -1 2 0 -9 0 -6 0 -3 0 0 3 0 6 0 9 0 1 2 0 1 5 0 1 8 0 L o n g itu d e L o n g itu d e H ita c h i 1 M :A ltitu d e :1 7 5 0 k m - 1 8 5 0 k m H ita c h i 1 M :A ltitu d e :2 4 5 0 k m - 2 5 5 0 k m 9 0 9 0 7 5 7 5 6 0 U p s e ts /B it/D a y 6 0 U p s e ts /B it/D a y 1 .0 E -7 to 5 .0 E -7 1 .0 E -7 to 5 .0 E -7 5 .0 E -7 to 1 .0 E -6 5 .0 E -7 to 1 .0 E -6 4 5 1 .0 E -6 to 5 .0 E -6 4 5 1 .0 E -6 to 5 .0 E -6 5 .0 E -6 to 1 .0 E -5 5 .0 E -6 to 1 .0 E -5 3 0 1 .0 E -5 to 5 .0 E -5 3 0 1 .0 E -5 to 5 .0 E -5 5 .0 E -5 to 1 .0 E -4 5 .0 E -5 to 1 .0 E -4 1 .0 E -4 to 5 .0 E -4 1 .0 E -4 to 5 .0 E -4 e 1 5 5 .0 E -4 to 1 .0 E -3 e 1 5 5 .0 E -4 to 1 .0 E -3 d 1 .0 E -3 to 5 .0 E -3 d 1 .0 E -3 to 5 .0 E -3 u u t t i 0 i 0 t t a a L -1 5 L -1 5 -3 0 -3 0 -4 5 -4 5 -6 0 -6 0 -7 5 -7 5 -9 0 -9 0 -1 8 0 -1 5 0 -1 2 0 -9 0 -6 0 -3 0 0 3 0 6 0 9 0 1 2 0 1 5 0 1 8 0 -1 8 0 -1 5 0 -1 2 0 -9 0 -6 0 -3 0 0 3 0 6 0 9 0 1 2 0 1 5 0 1 8 0 11 Space RaLdoiantigointu Edfefects on Electronics presented by Kenneth A.
Recommended publications
  • 小型飛翔体/海外 [Format 2] Technical Catalog Category
    小型飛翔体/海外 [Format 2] Technical Catalog Category Airborne contamination sensor Title Depth Evaluation of Entrained Products (DEEP) Proposed by Create Technologies Ltd & Costain Group PLC 1.DEEP is a sensor analysis software for analysing contamination. DEEP can distinguish between surface contamination and internal / absorbed contamination. The software measures contamination depth by analysing distortions in the gamma spectrum. The method can be applied to data gathered using any spectrometer. Because DEEP provides a means of discriminating surface contamination from other radiation sources, DEEP can be used to provide an estimate of surface contamination without physical sampling. DEEP is a real-time method which enables the user to generate a large number of rapid contamination assessments- this data is complementary to physical samples, providing a sound basis for extrapolation from point samples. It also helps identify anomalies enabling targeted sampling startegies. DEEP is compatible with small airborne spectrometer/ processor combinations, such as that proposed by the ARM-U project – please refer to the ARM-U proposal for more details of the air vehicle. Figure 1: DEEP system core components are small, light, low power and can be integrated via USB, serial or Ethernet interfaces. 小型飛翔体/海外 Figure 2: DEEP prototype software 2.Past experience (plants in Japan, overseas plant, applications in other industries, etc) Create technologies is a specialist R&D firm with a focus on imaging and sensing in the nuclear industry. Createc has developed and delivered several novel nuclear technologies, including the N-Visage gamma camera system. Costainis a leading UK construction and civil engineering firm with almost 150 years of history.
    [Show full text]
  • The Effect of Gamma Radiation on Fibre Bragg Grating Sensors When Used As Radiation Dosimeters
    Edith Cowan University Research Online Theses : Honours Theses 2013 The effect of gamma radiation on fibre Bragg grating sensors when used as radiation dosimeters Des Baccini Edith Cowan University Follow this and additional works at: https://ro.ecu.edu.au/theses_hons Part of the Nuclear Engineering Commons, and the Semiconductor and Optical Materials Commons Recommended Citation Baccini, D. (2013). The effect of gamma radiation on fibre Bragg grating sensors when used as radiation dosimeters. https://ro.ecu.edu.au/theses_hons/79 This Thesis is posted at Research Online. https://ro.ecu.edu.au/theses_hons/79 Edith Cowan University Research Online Theses : Honours Theses 2013 The effect of gamma radiation on fibre Bragg grating sensors when used as radiation dosimeters Des Baccini Edith Cowan University Recommended Citation Baccini, D. (2013). The effect of gamma radiation on fibre Bragg grating sensors when used as radiation dosimeters. Retrieved from http://ro.ecu.edu.au/theses_hons/79 This Thesis is posted at Research Online. http://ro.ecu.edu.au/theses_hons/79 Edith Cowan University Copyright Warning You may print or download ONE copy of this document for the purpose of your own research or study. The University does not authorize you to copy, communicate or otherwise make available electronically to any other person any copyright material contained on this site. You are reminded of the following: Copyright owners are entitled to take legal action against persons who infringe their copyright. A reproduction of material that is protected by copyright may be a copyright infringement. A court may impose penalties and award damages in relation to offences and infringements relating to copyright material.
    [Show full text]
  • Radiation Risks and Mitigation in Electronic Systems
    Published by CERN in the Proceedings of the CAS-CERN Accelerator School: Power Converters, Baden, Switzerland, 7–14 May 2014, edited by R. Bailey, CERN-2015-003 (CERN, Geneva, 2015) Radiation Risks and Mitigation in Electronic Systems B. Todd and S. Uznanski CERN, Geneva, Switzerland Abstract Electrical and electronic systems can be disturbed by radiation-induced effects. In some cases, radiation-induced effects are of a low probability and can be ignored; however, radiation effects must be considered when designing systems that have a high mean time to failure requirement, an impact on protection, and/or higher exposure to radiation. High-energy physics power systems suffer from a combination of these effects: a high mean time to failure is required, failure can impact on protection, and the proximity of systems to accelerators increases the likelihood of radiation- induced events. This paper presents the principal radiation-induced effects, and radiation environments typical to high-energy physics. It outlines a procedure for designing and validating radiation-tolerant systems using commercial off-the-shelf components. The paper ends with a worked example of radiation-tolerant power converter controls that are being developed for the Large Hadron Collider and High Luminosity-Large Hadron Collider at CERN. Keywords Radiation effects; dependability; controls. 1 Introduction to radiation-induced effects Radiation has the potential to interfere with electronic devices and systems, creating so-called radiation-induced effects [1]. At ground level, atmospheric neutrons due to cosmic rays are a primary source of radiation. Cosmic rays are high-energy particles reaching Earth from space. These interact with Earth’s atmosphere, producing a shower of particles: neutrons, protons, electrons, and many others, some of which reach the Earth’s surface.
    [Show full text]
  • Radiation Risks and Mitigation in Electronic Systems
    Radiation Risks and Mitigation in Electronic Systems B. Todd and S. Uznanski CERN, Geneva, Switzerland Abstract Electrical and electronic systems can be disturbed by radiation-induced effects. In some cases, radiation-induced effects are of a low probability and can be ignored; however, radiation effects must be considered when designing systems that have a high mean time to failure requirement, an impact on protection, and/or higher exposure to radiation. High-energy physics power systems suffer from a combination of these effects: a high mean time to failure is required, failure can impact on protection, and the proximity of systems to accelerators increases the likelihood of radiation- induced events. This paper presents the principal radiation-induced effects, and radiation environments typical to high-energy physics. It outlines a procedure for designing and validating radiation-tolerant systems using commercial off-the-shelf components. The paper ends with a worked example of radiation-tolerant power converter controls that are being developed for the Large Hadron Collider and High Luminosity-Large Hadron Collider at CERN. Keywords Radiation effects; dependability; controls. 1 Introduction to radiation-induced effects Radiation has the potential to interfere with electronic devices and systems, creating so-called radiation-induced effects [1]. At ground level, atmospheric neutrons due to cosmic rays are a primary source of radiation. Cosmic rays are high-energy particles reaching Earth from space. These interact with Earth’s atmosphere, producing a shower of particles: neutrons, protons, electrons, and many others, some of which reach the Earth’s surface. In particle accelerators, the accelerators themselves are sources of radiation.
    [Show full text]
  • Radiation Tolerant Electronics
    electronics Editorial Radiation Tolerant Electronics Paul Leroux KU Leuven, Dept. Electrical Engineering (ESAT) - ADVISE, 2440 Geel, Belgium; [email protected] Received: 20 June 2019; Accepted: 25 June 2019; Published: 27 June 2019 1. Introduction Research on radiation tolerant electronics has increased rapidly over the last few years, resulting in many interesting approaches to model radiation effects and design radiation hardened integrated circuits and embedded systems. This research is strongly driven by the growing need for radiation hardened electronics for space applications, high-energy physics experiments such as those on the large hadron collider at CERN, and many terrestrial nuclear applications including nuclear energy and safety management. With the progressive scaling of integrated circuit technologies and the growing complexity of electronic systems, their ionizing radiation susceptibility has raised many exciting challenges, which are expected to drive research in the coming decade. Even though total ionizing dose effects in bulk CMOS are well known, little is still known on the radiation performance of advanced (FD-)SOI and FinFET technologies. Regarding single-event effects, the continued scaling has drastically increased the number of multiple-transistor or multiple-cell upsets, which requires not only new solutions to reduce the error rate in digital and mixed-signal ASICs, but also for FPGAs. The radiation hardness assurance of complex systems with multiple components in mixed technologies also necessitates new testing paradigms and verification methodologies to limit the time and cost for evaluation. 2. The Present Issue This Special Issue features fifteen articles highlighting recent breakthroughs in modeling radiation effects for the design of radiation hardened integrated circuits, radiation hardening in embedded systems, and radiation hardening assurance.
    [Show full text]
  • The Sensitivity of Microwave Bipolar Transistors and Amplifiers To
    © 1979 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. IEEE Transactions on Nuclear Science,Vol. NS-26,No. 3, June 1979 THE SENSITIVITY OF MICFWAVF,BIPOLAR TRANSISTORS ANDAMPLIFIERS n> IONIZING RADIATION I. Thmon, M.H. Gibson, M.B. Christensen and G.J.G. Janssens European Space Technology Centre, European Space Agency, Noordwijk, The Netherlands ABsm full design life of the sateljite without due care to radiation “hardening” design , It has been previously shown that small-signal micrawave transistors are sensitive to ionizing ra- Detailed component and amplifier characterisation diation 2 a3ndthat this can lead to application and analysis work referred to in References 2 and 3 limitations . This paper extends the work to a related to three types of small-signal transistors wider range of currently used transistor types and from a specific manufacturer and in linear amplifier amplifiers with applications ranging from low noise applications. Although similar effects had been obser- front-end to class C wer output amplifiers. TW ved on a wide range of transistor types frckn various types of degradation have been identified viz. manufacturers, not 11 these devices had been studied “permanent% Eand room-temperature current dependent in the same detail 3 . “recoverable”. Both types of degradation have been found throughout the range of transistor types and it MicrcxlJave bipolar transistors are used in a wide is shm that they can also be si..muilated by avalan- variety of applications from ICW noise linear receivers ching the emitter-base junctions.
    [Show full text]
  • Airborne to Spaceborne – Qualifying a Radiometer for Spaceflight
    AIRBORNE TO SPACEBORNE – QUALIFYING A RADIOMETER FOR SPACEFLIGHT Alan Fromberg, Chris Prior, Eric Pritchard [email protected] Systems Engineering & Assessment Ltd, SEA House, Bristol Business Park, Coldharbour Lane, Bristol, BS16 1EJ, UK. www.sea.co.uk A microwave radiometer is a noise measuring instrument comprised of two RF assemblies, which consists of bespoke millimetre wave equipment at the front-end of the instrument and IF assemblies, of generally off-the-shelf components, at the back-end of the instrument, before conversion of the RF input to a DC output for further processing. In terms of a UK project, like the Met Office instrument being upgraded under the European Space Agency (ESA) Cloud and Precipitation Airborne Radiometer (CPAR) project, the instrument front- ends, being above 43GHz, would be covered by UK export controls, but the IF assemblies, although much lower in frequency, are, in some areas, subject to US EAR99 and potentially ITAR restrictions. The European Space Agency and EUMETSAT are planning to build a series of radiometers for flight on the Second Generation Operational Polar Orbiter Mission (METOP2G) with development likely to commence in 2013. For RF spaceborne applications virtually all US RF components are covered by ITAR. So for European based Space projects European sources of radiation-hardened standard components (mixers, multipliers, oscillators, amplifiers etc) are required, thus avoiding the complexities of ITAR for each new future project. In this paper we present a survey of the available radiation-hardened microwave technologies in Europe and where technologies need to be developed for spaceborne radiometry outside of ITAR restrictions.
    [Show full text]
  • An Abstract of the Thesis Of
    AN ABSTRACT OF THE THESIS OF Tyler Oshiro for the degree of Master of Science in Radiation Health Physics presented on June 14, 2018. Title: Soft Robotics in Radiation Environments: A Prospective Study of an Emerging Automated Technology for Existing Nuclear Applications Abstract approved: Camille Palmer Traditional robots have a long history in nuclear-related work because their integration decreases risk to humans in dangerous environments. Soft robotics is one promising new branch of traditional robotics with proposed applications in industry, medicine, and society. Collaborators from the Robotics mLab at Oregon State University (OSU) are currently working on a proof of concept soft robotic manipulator built from 3-D printed silicone elastomer. It is therefore an opportune time to analyze the potential of this new soft robot and similar models to contribute to nuclear environments. This prospec- tive analysis identifies the components of the soft robotic system and representative radiation environments for robotic tasks, then measures the functional capability of these components in the environments. Samples of polydimethysiloxane (PDMS) were exposed to gamma irradiation then studied for changes to mechanical properties, in- cluding elongation, tensile strength, and compression. Results from these tests showed less than a 25% gamma-induced change in all but the highest exposure environment. In addition, a 7-hour exposure of PDMS to the mixed radiation flux surrounding OSU's TRIGA research reactor (OSTR) resulted in activation of some unexpected impurities, including members of the lanthanide series. Liquid metal sensors being considered for use in soft robotics were also tested by measuring resistance during gamma exposure at 0.1 Gy/hr; no changes were noticeable.
    [Show full text]
  • Fusion and Spallation Irradiation Conditions Steven J
    Fusion and Spallation Irradiation Conditions Steven J. Zinkle Metals and Ceramics Division Oak Ridge National Laboratory, Oak Ridge, TN International Workshop on Advanced Computational Science: Application to Fusion and Generation-IV Fission Reactors Washington DC, March 31-April 2, 2004 Comparison of fission and fusion (ITER) neutron spectra Stoller & Greenwood, JNM 271-272 (1999) 57 • Main difference between fission and DT fusion neutron spectra is the presence of significant flux above ~4 MeV for fusion –High energy neutrons typically cause enhanced production of numerous transmutation products including H and He –The Primary Knock-on Atom (PKA) spectra are similar for fission and fusion at low energies; fusion contains significant high-energy PKAs (>100 keV) Displacement Damage Mechanisms are being investigated with Molecular Dynamics Simulations Damage efficiency saturates when subcascade formation occurs Avg. Avg. fission fusion Molecular dynamics modeling of displacement cascades up to 50 keV PKA 200 keV and low-dose experimental tests (microstructure, tensile (ave. fusion) properties, etc.) indicates that defect production from fusion and fission neutron collisions are similar 10 keV PKA => Defect source term is similar for fission and fusion conditions (ave. fission) Peak damage state in iron cascades at 100K 5 nm A critical unanswered question is the effect of higher transmutant H and He production in the fusion spectrum Radiation Damage can Produce Large Changes in Structural Materials • Radiation hardening and embrittlement
    [Show full text]
  • Draft Thesis Proposal
    Polyvinyl Alcohol and Medium Density Polyethylene Composite Materials for Neutron Radiation Shielding by Glen C. King Submitted in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in Materials Science and Engineering Norfolk, Virginia 2020 Abstract Manned spacecraft venturing beyond the Earth’s Van Allen Belts will be subjected to high levels of radiation from both energetic particles emanating from the sun and from galactic atomic events, such as supernovae. The metal shell of a spacecraft offers some protection from gamma radiation and high energy particles originating from both the sun and cosmic sources. The interaction of these high energy particles and radiation with the spacecraft hull create secondary radiation and neutrons, additional hazards for astronauts and electronic systems. Shielding of neutrons is the most challenging of the high energy radiation, since neutrons have zero charge and are least affected by electrical fields, magnetic fields, and atomic forces. Previous studies showed that polyethylene is an effective neutron shielding material, due to its high hydrogen content. High energy neutrons are slowed to thermal neutrons through multiple collisions with the hydrogen atoms, increasing the effectiveness of neutron capture by boron-10 atoms. This study discusses the fabrication and testing of polyvinyl alcohol (PVOH) samples as a neutron shielding material, with comparison to medium density polyethylene (MDPE) composite samples to be used for neutron shielding for spacecraft. OLTARIS (On-Line Tool for the Assessment of Radiation in Space) was used for radiation shielding simulation and compared with experimental data. Modeling indicates that the most effective shielding from radiation was in an aluminum layer backed by a polymer layer, either MDPE or PVOH.
    [Show full text]
  • Section IV Radiation Hardening at the System Level
    2007 IEEE NSREC Short Course Section IV Radiation Hardening at the System Level Ray Ladbury NASA Goddard Space Flight Center Radiation Hardening at the System Level Ray Ladbury NASA Goddard Space Flight Center Radiation Effects and Analysis Group Table of Contents 1 INTRODUCTION: SYSTEMS AND SYSTEM HARDENING........................... 3 1.1 SYSTEM-LEVEL MITIGATION: WHY NOW? .......................................................... 6 1.2 OVERVIEW OF THE SYSTEM-LEVEL HARDENING PROCESS .................................... 8 2 WHEN DO WE MITIGATE? ............................................................................... 13 2.1 REQUIREMENTS GENERATION AND FLOWDOWN ................................................. 13 2.2 RADIATION TESTING AND ANALYSIS: ERRORS AND INFERENCE ........................ 15 2.2.1 Errors and inference for TID........................................................................ 15 2.2.2 Errors and Inference for Displacement Damage.......................................... 19 2.2.3 Errors and Inference for SEE ....................................................................... 20 2.3 FAILURE COST AND SEVERITY ........................................................................... 22 2.4 FAILURE RISK AND CRITICALITY ....................................................................... 24 3 RADIATION EFFECTS AND THEIR MITIGATION...................................... 28 3.1 RADIATION EFFECTS AND THEIR CONSEQUENCES.............................................. 30 3.2 DESTRUCTIVE SINGLE-EVENT EFFECTS ............................................................
    [Show full text]
  • 2008 Ieee Nuclear and Space Radiation Effects
    20082008 IEEEIEEE NUCLEARNUCLEAR ANDAND SPACESPACE RADIATIONRADIATION EFFECTSEFFECTS CONFERENCECONFERENCE JULYJULY 1414 -- 18,18, 20082008 JWJW MARRIOTTMARRIOTT STARRSTARR PASSPASS RESORTRESORT && SPASPA TUCSON,TUCSON, ARIZONAARIZONA Sponsored by IEEE/NPSS Radiation Effects Committee Supported by Defense Threat Reduction Agency | Air Force Research Laboratory Sandia National Laboratories | Jet Propulsion Laboratory NASA Electronic Parts and Packaging Program | BAE Systems | Micro-RDC Boeing | Northrop Grumman | Honeywell | Aeroflex Colorado Springs Starr Pass Conference Facilities Registration Desk SCHEDULE OF EVENTS ARIZONA BALLROOMS 1 to 5 Tuesday thru Friday ~ Posters ARIZONA BALLROOMS 6 and 7 Monday ~ Short Course Tuesday thru Friday ~ Technical Sessions ARIZONA BALLROOMS 8 to 12 Tuesday thru Friday ~ Data Workshop TUCSON BALLROOM Sunday ~ Short Course Reception Monday ~ Short Course Lunch Tuesday & Wednesday ~ Exhibits FRONT LAWN Monday, Tuesday & Wednesday ~ Aerobics TBD Monday, Tuesday & Wednesday ~ A/V Previews ScheduleSchedule Monday Tuesday Wednesday Thursday Friiday Tiime JulyJuly 14 JulyJuly 15 JulyJuly 16 JulyJuly 17 JulyJuly 18 7:30 [7:30] Continental Breakfast, Tucson Ballroom [7:45] Continental Breakfast, [7:45] Continental Breakfast, [7:45] Continental Breakfast, [7:45] Continental Breakfast, Arizona Foyer Arizona Foyer Tucson Ballroom Arizona Foyer 8:00 [8:00] Short Course Introduction Jeffrey Black Arizona Ballrooms 6 – 7 [8:10] Part 1 – 8:15 Fundamental Mechanisms for Single Particle-Induced Soft Errors 8:30 Robert
    [Show full text]