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Organization / Research

Akira Ando Laboratory


[PHOTO.1] Akira ANDO, Professor [PHOTO.2] Kazunori TAKAHASHI, Associate Professor
[PHOTO.3] Atsushi KOMURO, Assistant Professor

With an emphasis on applications in "space, energy and environment" engineering fields, basic researches on magneto-hydro-dynamic (MHD) phenomena caused by a high pressure and a high-speed flow in space and fusion plasmas are being studied.

In space plasmas are observed prominent MHD phenomena such as anomalous heating in a solar corona, collisionless shock wave in front of the earth magnetosphere, magnetic reconnection in the earth magneto-tail accompanied by a violent aurora, astronomical jet from a rotating accretion disk around a black hole.

In magnetic fusion plasmas, magnetic reconnection and self-organized structure formation associated with a shear flow are also observed and still under intensive study to improve the confinement performance.

Research subjects currently covered:

  1. Production of a supersonic plasma flow and a space electric propulsion
    1. Acceleration mechanism of an magneto-plasma-dynamic (MPD) thruster
    2. Magnetic Laval nozzle characteristics for a thermal-to-flow energy conversion
    3. ICRF heating of a supersonic flow for a specific impulse and thrust control
    4. Development of a high-density Hall current thruster
  2. Basic researches on MHD Phenomena in space and fusion plasmas and an advanced fusion confinement concept
    1. Flow-shear stabilization of low-frequency instabilities
    2. Interaction of a supersonic plasma flow with gas-, solid- and magnetic targ
    3. Propagation of a large amplitude Alfven wave in a fast flowing plas
    4. Formation and stability of a self-organized MHD vortex with a high speed flow
  3. Development of plasma diagnostics
    1. Imaging reflectometer by use of a ultra-short-pulse mm-wave
    2. CRD (Cavity-Ring-Down) laser interferometer
    3. Time-resolved spectroscopy by use of a CCD detector
    4. Ultra-fast-CCD framing camera
    5. Mach probe and micro-chip magnetic probe
    6. Time-of-flight (TOF) neutral-particle-energy analyzer
  4. Applications in environment-, nano-, bio- and power-technologies
    1. Discharge in a flowing liquid for a water purification
    2. Flow-stabilized, atmospheric-pressure glow discharge
    3. Electro-hydro-dynamics (EHD) pump
    4. Development of a high-efficiency, high-power mm-wave device
Group of Electrical Engineering, Communication Engineering,
Electronic Engineering, and Information Engineering, Tohoku University
6-6-05, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
TEL : 022-795-7186 (Japanese Only)
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