Generation of supersonic and super-Alfvenic flow using ICRF heating and a magnetic nozzle Generation of Supersonic and Super-Alfvénic Flow Using ICRF Heating and a Magnetic Nozzle

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    • ANDO Akira
    • Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
    • HAGIWARA Tatsuya
    • Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
    • INUTAKE Masaaki
    • Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan


Fast-flowing plasmas in supersonic and super-Alfvénic regime are generated in combined experiments of ion cyclotron resonance heating (ICRH) and acceleration in a magnetic nozzle. During radio-frequency (RF) wave excitation in a fast-flowing plasma produced by a magnet-plasma-dynamic arcjet (MPDA), strong ion cyclotron heating is clearly observed. Thermal energy in the heated plasma is converted into flow energy in a diverging magnetic nozzle, where the magnetic moment μ is nearly kept constant. Plasma flow energy can be controlled by changing the input RF power and/or modifying the magnetic nozzle configuration. In a strongly diverging magnetic nozzle, an Alfvén Mach number as well as ion acoustic Mach number are more than unity, that is, supersonic and super-Alfvénic plasma flow is realized.


  • Plasma and Fusion Research

    Plasma and Fusion Research (3), S1018-S1018, 2008

    The Japan Society of Plasma Science and Nuclear Fusion Research


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