  A novel technique for the control of fine particle behavior is developed and
demonstrated experimentally. The technique is called a time-averaged particle
driving (TAPD) method. This method contains an application of positive pulses
to two point-electrodes placed facing each other with some distance in plasmas
with fine particles. When the positive pulses are applied alternatively with a
repetition period that is shorter than the particle response time, the
particles feel only time-averaged force because of the large mass and are
transported around the center between two point-electrodes. This method is
quite effective for converging fine particles in the plasma.
