| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2009: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2008: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
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| Research Abstract |
A new magnetospheric energy principle was constructed for spherically symmetric monopolar magnetospheres with magnetic field lines extending to infinity. By using eikonal assumption, I showed the existence of ionosphere-driven magnetohydrodynamic (MHD) instabilities for spherically symmetric monopolar magnetospheres and for magnetospheres with closed field lines. For an arbitrary closed magnetospheric configuration, which includes a dipole field, a general stability criterion was obtained for pressure-driven interchange instability. A nonideal MHD eigenmode equation was derived for a velocity shear instability, which is driven by a shear in the ion diamagnetic drift velocity in sheared magnetic fields, and a general stability criterion was obtained.
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