FIELD: physics, optics.
SUBSTANCE: invention is related to elements of focusing systems of electron-beam and SHF instruments with transverse-longitudinal interaction, and may be also used in accelerating equipment and electronic microscopy. Technical result is achieved by the fact that superhigh frequency multipole lens comprises resonator system that includes at least four electrodes connected serially as next nearest and installed symmetrically along circumference, coaxially to flow of charged particles passing inside. Electrodes of resonator system are arranged in the form of resonance sections of round metal rods with at least six symmetrically installed longitudinal grooves, width of which is equal to their depth and to quarter of slow wave length.
EFFECT: possibility to realise simultaneous focusing and prolonged interaction of beam with transverse-longitudinal electromagnet field and continuous power takeoff, which makes it possible to operated with broad bundles of charged particles.
2 dwg
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