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Development of waveform observation system with 1ps time resolution and 100 micron specific resolution

Research Project

Project/Area Number 02555080
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 電子機器工学
Research InstitutionNagoya University

Principal Investigator

HAYAKAWA Hisao  Dept. of Electronics, Nagoya University, Professor, 工学部, 教授 (60189636)

Co-Investigator(Kenkyū-buntansha) INOUE Masumi  Dept. of Electronics, Nagoya University, Research Associate, 工学部, 助手 (00203258)
FUJIMAKI Akira  Dept. of Electronics, Nagoya University, Research Associate, 工学部, 助手 (20183931)
TAKAI Yoshiaki  Dept. of Electronics, Nagoya University, Associate Professor, 工学部, 助教授 (50109287)
HASUO Shinya  Fujitsu Laboratories Ltd., Researcher, 研究員
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥6,200,000 (Direct Cost: ¥6,200,000)
Fiscal Year 1991: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1990: ¥4,400,000 (Direct Cost: ¥4,400,000)
KeywordsJosephson sampler / Josephson junction / superconducting packaging / 超伝導配線 / ストリップライン
Research Abstract

The purpose of this study is to develop the waveform observation system with a few picosecond time resolution and a few hundred micron specific resolution. Moreover, microwave propagation properties are analyzed by using the system.
(1) [High quality Josephson junctions] It was found that the impurities in the electrodes caused reduction of the superconducting order parameter. We could developed the preparation process of the ideal-like Josephson junctions by increasing the deposition rate of Nb. In addition, the oxidation mechanism was found from the dependence of the critical current density on the oxidation gas pressure.
(2) [Waveform observation system] We have developed the waveform observation system with 10ps time resolution and 10muA current sensitivity, which was achieved by reducing the external noise and matching the impedance between Josephson junction circuits and external electronics.
(3) [Microwave observation system] We have measured the surface impedance of Nb and AI films by using the system. The experimental results agreed well with the theoretical values based on the BCS theory. The surface resistance of Y-Ba-Cu-0 high Tc superconducting films is under investigation.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] A.Fujimaki: "Experimental Analysis of Superconducting Properties of Y-Ba-Cu-O/Ag Proximity Interfaces." IEEE Trans Magn.MAG-27. 1353-1356 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Hatou: "Comparison of Si and InSb as the Normal Layer of S-N-S junctions." IEEE Trans.Magn.MAG-27. 2585-2588 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H.Akaike: "Submicrometer-scale Patterning of Superconducting Nb Films Using Focused Ion Beam." Jpn.J.Appl.Phys.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A. Fujimaki, Y. Takai, H. Hayakawa: "Experimental analysis of superconducting properties of Y-Ba-Cu-O/Ag proximity interfaces." IEEE Trans. Magn., MAG-27. 1353-1356 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Hatou, H. Akaike, A. Fujimaki Y. Takai, H. Hayakawa: "Comparison of Si and InSb as the normal layer of S-N-S junctions." IEEE Trans. Magn., MAG-27. 2585-2588 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Akaike, A. Fujimaki Y. Takai, H. Hayakawa: "Submicronmeter-scale patterning of superconducting Nb films using focused ion beam." Jpn. J. Appl. Phys.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A.Fujimaki: "Experimental Analysis of Superconducting Properties of Y-Ba-Cu-O/Ag Proximity Interfaces." IEEE Trans.Magn.MAG-27. 1353-1356 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Hatou: "Comparison of Si and InSb as the Normal Layer of S-N-S Junctions." IEEE Trans.Magn.MAG-27. 2585-2588 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Akaike: "Submicrometer-scale Patterning of Superconducting Nb Films Using Focused Ion Beam." Jpn.J.Appl.Phys.

    • Related Report
      1991 Annual Research Report
  • [Publications] A.Fujimaki: "Experimental Analysis of YBa_2Cu_3O_×/Ag Proximity Interfaces." Japanese Journal of Applied Physics. 29. L1659-1662 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] A.Fujimaki: "Experimental Analysis of Superconducting Properties of YーBaーCuーO/Ag Proximity Interfaces." IEEE Trans.Magn.MAGー27. (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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