Accession Number : AD0784792

Title :   Summary Report on Magnetic Bubble Material Radiation Hardness Study.

Descriptive Note : Physical and mathematical sciences research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Lowe,Lester F. ; Turner,Clarence D. ; Hyatt,John R.

Report Date : 12 JUL 1974

Pagination or Media Count : 13

Abstract : Several magnetic bubble material samples were exposed to fission neutrons and Co-60 gamma rays in order to assess their radiation sensitivity. Magnetic property measurements were made before and after irradiation. No changes in magnetic properties were observed in any sample up to 4 x to the 14th power n/sq cm and 10 to the 8th power to 10 to the 9th power Rad(Si) Co-60. Table 1 summarizes the results and also gives other results on other samples which were irradiated at AFCRL and evaluated elsewhere. The in-house measurements consisted of coercivity, magnetization, wall energy, and characteristic length. Appendix A gives a detailed data analysis of the inhouse experimental results on three samples. The remainder of this report consists of a brief summary of the experimental measurements made at AFCRL and also the details of the radiation exposures.

Descriptors :   *Thin film storage devices, *Radiation hardening, Magnetic materials, Magnetic domains, Magnetization, Neutrons, Gamma rays

Subject Categories : Computer Hardware
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE