By Jonathan Pierson.  The ESPART analyzer uses the principle of Stokes’ Law and Laser Doppler Effect in determining the particle size and charge.  As.

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Presentation transcript:

By Jonathan Pierson

 The ESPART analyzer uses the principle of Stokes’ Law and Laser Doppler Effect in determining the particle size and charge.  As a particle travels through air it experiences a drag force which is proportional to the diameter of the particle, given by Stokes’ Law. Charge also effects its diameter given.

 The MiniLDV emits two laser beams that when a particle travels through the intersection of the beams, they are read by the receiving lens and a sinusoidal wave is formed.  The larger the charge of the particle the larger its signature is.