NDLI: Radiation Tolerance of Bubble-Domain Materials and Devices

Content Provider	IEEE Xplore Digital Library
Author	Williams, R. A. Henry, R. D. Chen, T. T. Archer, J. L.
Copyright Year	1963
Abstract	Following a brief outline of magnetic bubble domain technology and possible radiation effects, the results of radiation effects experiments are presented. Permanent damage experiments on materials consisted of characterizing samples of Y3 (FeGa)5O12, Er3(FeGa)5O12, and (YGdTm)3 (FeGa)5O12 films before and after exposure to neutrons from a TRIGA reactor and to Co60 gammas. Parameter measurements included saturation magnetization, wall energy, defect density, wall mobility, coercivity, and saturation velocity. No significant changes in these parameters were observed after 1015 n/cm2 (1 MeV equivalent) and 5 × 107 rads. Permanent damage experiments on devices included measurements of propagation and annihilation margins, and domain sensor output (for shift registers) before and after exposure to reactor neutrons and Co60 gammas. Again no significant change was found after 4 × 1014 n/cm2 (1 MeV equivalent) and 5 × 107 rads for devices with hard-bubble suppression. Magnetoresistive parameters of a thin, permalloy domainsensor film were also unchanged after 1015 n/cm2 and 5 × 107 rads. Information stored in a shift register was read electrically immediately before and after exposure to a 30 ns pulse of 1.5 MeV electrons with a dose of 3 × 104 rads(Si) and found unchanged. A similar experiment, using optical determination of the stored information, indicated no change after a 1.7 × 105 rad pulse.
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	229
Ending Page	233
Page Count	5
File Size	977743
File Format	PDF
ISSN	00189499
Volume Number	20
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1973-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic materials Saturation magnetization Radiation effects Neutrons Inductors Shift registers Optical pulses Magnetic domains Magnetic films Density measurement
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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