A new mehtod for measuring the dynamic behaivor of a single particle in ocmbustin ocnditions has been deveoepd.In this method,a particle is suspended in an eelectric field where various forces (gravity,free convection,forced convection,and photophoretic forces) are appleid to it ,normal to each other.An electro-opticla systme serves as a controller that views the paricle's position and retains it at a fixed position by adjusting the electric forces at htree coordinates.
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