The invention discloses a multifunctional
ion gun which comprises an
ionization chamber, a first lens, a second lens, a first deflecting plate, a second deflecting plate, a slot, a four-way
flange, a transition
flange and a cone-shaped cylinder. The
ionization chamber, the first lens and first deflecting plate are placed in a pipeline of the four-way
flange. The first lens is placed between the
ionization chamber and the first deflecting plate. The first deflecting plate is placed at the near end of the transition flange. The
ionization chamber is arranged at the far end of the transition flange. The second lens, the second deflecting plate and the slot are placed in the cone-shaped cylinder. The second deflecting plate is placed between the second lens and the slot. The second lens is arranged at the near end of the transition flange. The slot is formed in the far end of the transition flange. The four-way flange and the cone-shaped cylinder are connected through the transition flange. The purposes that the structure is compact, functions are various, performance is stable, and
ion beam transmission distance is enhanced are achieved.