IONIC EMISSION MICRONIC SOURCE

摘要

The invention relates to an ionic emission device that comprises an emission member including a hollow insulation needle (10), said hollow needle having an electrically insulating tip (16) protruding at the apex (13) thereof. The needle (10) also includes a chamber (11) having an outlet opening (14) that opens in the vicinity of the tip (16). The invention also relates to a focused ionic emission method that uses the above emission device and an extraction electrode, wherein said device comprises applying an extraction voltage to said extraction electrode. Moreover, as the device includes an adjustment electrode, the method also comprises the application of an adjustment voltage to said electrode.