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Magnetic field shield for high resolution nondestructive DC current monitors

Research Project

Project/Area Number 09640357
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionOsaka University

Principal Investigator

HATANAKA Kichiji  Research Center for Nuclear Physics, Osaka University, Professor, 核物理研究センター, 教授 (50144530)

Co-Investigator(Kenkyū-buntansha) TAKAHISA Keiji  Research Center for Nuclear Physics, Osaka University, Research associate, 核物理研究センター, 助手 (30263338)
SATO Kenji  Research Center for Nuclear Physics, Osaka University, Professor, 核物理研究センター, 教授 (60013421)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1998: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1997: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsDC current monitor / Superconducting / SQUID / Magnetic field shield / 超電等 / 超電受量子干渉素子 / 電磁モニター / 超電導量子干渉素子
Research Abstract

A beam intensity monitor using a SQUID was designed at RCNP in order to measure the ion beam intensity in a non-destructive manner.
1. Magnetic field shilding is an essential point to realize the high resolution. Shielding effects of superconductors were simulated following the London equation.
2. Two types of small-sized models were tested ; a coaxial cavity and a folder type cavity with five ring type shield elements. Cavity walls were made of 1 mm thick lead.
3. A double washer DC SQUID was used as the magnetic flux sensor.
4. For the coaxial type cavity, the shielding efficiency of 10ィイD1-13ィエD1 was observed as expected from the numerical simulations. However, the caxial cavity cannot be used as an actual monitor, because it is generally difficult to accommodate the long cavity in the beam line.
5. Shielding efficiency of the folder type cavity was measured to be 10ィイD1-8ィエD1 which was 10 times worse than numerical estimations.
6. From these investigation, a current monitor was designed and fablicated. From preliminary tests, 10 nA current was detected with 1-2 nA resolution.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Y.Sasaki,K.Hatanaka,et al.: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution"Proc.of The XVI RCNP Osaka Int.Conference. 249-251 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Sasaki,K.Hatanaka,et al.: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution"Proc.of The 11th Symposium on Accelerator Science and Technology. 255-257 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Sasaki,K.Hatanaka,et al.: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution"Proc.of The First Asian Particle Accelerator Conference. 543-545 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y. Sasaki, K. Hatanaka et al.: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution"Proc. Of The XVI RCNP Osaka Int. Conference. 249-251 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y. Sasaki K. Hatanaka et al.: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution"Proc. Of The 11th Symposium on Accelerator Science and Technology. 255-157 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y. Sasaki K. Hatanaka et al.: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution"Proc. Of The First Asian Particle Accelerator Conference. 543-545 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Sasaki: "Nondestructive DC Beam Current Monitor with Nano-Ampere Resolution" Proc. of The First Asian Particle Accelerator Conference. (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Sasaki: "Nondestructive DC Bean Current Monitor with Nano-Ampere Resolution" Proc.of The XVI RCNP Osaka International Conference. 249-251 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Sasaki: "Nondestructive DC Bean Current Monitor with Nano-Ampere Resolution" Proc.of the 11th Symposium on Accelerator Science and Technology. 255-257 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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