OPTICAL PARTICLE-EMITTING COLUMN Russian patent published in 2000 - IPC

FIELD: narrow-artery region. SUBSTANCE: particle beam emitting column incorporates needle source of ions such as liquid-metal ions, one or more annular lenses, and set of alternating quadrupoles. One of versions described in invention has liquid- alloy ion source 1, alternating quadrupoles 14, 16, and Wien velocity filter 22. Column emits finely focused beam and provides for enlarged aperture of lenses and high-strength beam currents. EFFECT: enlarged functional capabilities due to use of fully achromatic systems. 7 cl, 7 dwg