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1995 Fiscal Year Final Research Report Summary

DEVELOPMENT OF CENTRIFUGAL SEPARATION METHOD OF ISOTOPES BY USE OF A J*B DRIVEN ROTATING PLASMA

Research Project

Project/Area Number 05558059
Research Category

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

Allocation TypeSingle-year Grants
Research Field エネルギー学一般・原子力学
Research InstitutionIBARAKI UNIVERSITY

Principal Investigator

IKEHATA Takashi  IBARAKI UNIVERSITY,DEPARTMENT OF ELECTRIC AND ELECTRONIC ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (00159641)

Co-Investigator(Kenkyū-buntansha) SATO Naoyuki  IBARAKI UNIVERSITY,DEPARTMENT OF ELECTRIC AND ELECTRONIC ENGINEERING,RESEARCH AS, 工学部, 助手 (80225979)
MASE Hiroshi  IBARAKI UNIVERSITY,DEPARTMENT OF ELECTRIC AND ELECTRONIC ENGINEERING,PROFESSOR, 工学部, 教授 (30007611)
TANAKA Masatoshi  IBARAKI UNIVERSITY,DEPARTMENT OF ELECTRIC AND ELECTRONIC ENGINEERING,PROFESSOR, 工学部, 教授 (10250979)
Project Period (FY) 1993 – 1995
KeywordsROTATING PLASMA / ISOTOPE SEPARATION / PLASMA CENTRIFUGE / PLASMA ACCELERATION / PLASMA MACRO INSTABILITY / PLASMA PRODUCTION / J*B LORENTZ FORCE
Research Abstract

The aim of this research project is to develop plasma centrifuge for compact and economical stable-isotope separation. We designed two types of plasma sources : a gas-puff rotating plasma gun and a vacuum-discharge rotating plasma gun. They successfully generated gaseous rotating plasmas (Ar, He) and metal rotating plasmas (Zn/Cu, Cu, Mg/Al, Ag). Important problems associated with rotating plasmas such as the acceleration characteristics, the equilibrium and stability, charged-particle transport, and centrifugal separation coefficient have been investigated from both side of experiment and theory. First, the scaling relation of the plasma density and velocity against the discharge current and magnetic fields has been established. Because the rotational velocity is found to the magnetic field and inversely proportional to the discharge current, the use of superconducting magnet is recommended. Next, the onset of the instability on the plasma surface and its evolution to the spiral structure are observed. the mechanism is identified to be the centrifugal instability which is driven by the velocity shear between the rotating plasma and surrounding gas. For different gases and gas pressures, we measured the instability growth rate, the wave amplitude, the mode number, etc. In addition, we had a preliminaty result that the instability is stabilized if the magnetic field is strong (>1T) enough to magnetize plasma ions. Finally, we carried out the experiment on the centrifugal mass separation experiment for a mixed Zn/Cu rotating plasma. The maximum separation factor of 9 was obtained which was a hundred times as large as 0.1 of the conventional gas centrifuge.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 田中博道: "中性気体中における回転プラズマの不安定性と渦構造の形成" 電気学会プラズマ研究会資料. Ep-96. 91-100 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 津久井崇: "強磁場(3T)でのJ×B駆動回転プラズマの発生と同位体分離" 電気学会プラズマ研究会資料. Ep-96. 81-90 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] T.Ikehata: "Development of spiral-vortex structures of the plasma during rotation in a ueutral gas." Proc.5th Int.Symp.Potential Formation and Related Nonlinear Phenomena in Plasmas. (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] T.Ikehata: "Characteristics of a J×B driven rotating plasma in a magnetic field of up to 3T." Proc.1996 Int.Conf.Plasma Physics. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ikehata: "Large-scale structuring of a rotating plasma" Proc.1994 Int.Conf.Plasma Physics. 3. -176 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ikehata: "The stabilizing effect of a magnetic field on the plasma production of a vacuundischarge rotating plasmagun" Trans.IEE Japan. 114-A. 135-140 (1994)

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      「研究成果報告書概要(和文)」より
  • [Publications] HIROMICHI TANAKA: "DEVELOPMENT OF MACROINSTABILITIES AND FORMATION OF VORTEX STRUCTURES ON A PLASMA ROTATING IN A NEUTRAL GAS" Denkigakkai Plasma Kenkyuukai Shiryou (In Japanese). Ep-96-104. 91-100 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] TAKASHI TSUKUI: "GENERATION OF A J*B DRIVEN ROTATING PLASMA IN A MAGNETIC FIELD OF UP TO 3T AND ITS APPLICATION TO ISOTOPE SEPARATION" Denkigakkai Plasma Kenkyuukai Shiryou (In Japanese). Ep-96-103. 81-90 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] TAKASHI IKEHATA: "DEVELOPMENT OF SPIRAL-VORTEX STRUCTURES OF THE PLASMA DURING ROTATION IN A NEUTRAL GAS" Proc.5th Int.Symp.Potential Formation and Related Nonlinear Phenomena in Plasmas. (in press). (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] TAKASHI IKEHATA: "CHARACTERISTICS OF A J*B DRIVEN ROTATING PLASMA IN A MAGNETIC FIELD OF UP TO 3T" Proc.1996 Int.Conf.Plasma Physics. (in press). (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] TAKASHI IKEHATA: "LARGE-SCALE STRUCTURING OF A ROTATING PLASMA" Proc.1994 Int.Conf.Plasma Physics. Vol.3. 173-176 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] TAKASHI IKEHATA: "THE STABILIZING EFFECT OF A MAGNETIC FIELD ON THE PLASMA PRODUCTION OF A VACUUM-DISCHARGE ROTATING PLASMA GUN" Trans.IEE Japan. Vol.114-A. 135-140 (1994)

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      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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