| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
Micron-sized particles with negative charge and larger mass density than liquid helium(LHe) were dropped onto the LHe surface. Here, dust particles and LHe surface were charged with electrons emitted from a hot filament or an rf-plasma. The charge of those particles was found to be smaller than those measured at room temperature. Furthermore, a system with floating particles near the LHe surface was established by applying strong upward electric field(～a few kV/cm) on the LHe surface.
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