CONTROL METHOD AND DEVICE TO CONTROL MOVEMENT SPEED OF A SUBSTANCE AND USE THEREOF

摘要

Provided are: a control method and control device for the movement speed of a substance which are capable of accurately controlling the speed of movement of a substance, and improving the durability of a device; and a use therefor. An electrically charged substance is caused to move by a travel path formed by a first electric field and a second electric field which are formed in intersecting directions.