Radiant energy – With charged particle beam deflection or focussing – Magnetic lens
Patent
1995-06-12
1997-09-30
Nguyen, Kiet T.
Radiant energy
With charged particle beam deflection or focussing
Magnetic lens
25049221, 335210, 335213, H01J 37147
Patent
active
056728794
ABSTRACT:
A magnetic system for producing a magnetic field having static and high frequency time-varying components comprising: two magnetic poles defining a gap therebetween, the poles being formed with electrically insulating material for confining any high frequency induced eddy currents to limited values in local paths in the poles; an ac coil associated with the magnetic poles for producing a time-varying magnetic field in the gap; a magnetic structure including a yoke and two cores which are respectively coupled to the two poles, the magnetic structure being formed of solid material, with a high magnetic saturation level; and dc coils associated with the cores of the magnetic structure for producing a static magnetic field in the gap. The magnetic system are used for magnetically scanning an ion beam and an ion implantation system, both of which are based on the above system, as well as a magnetic system useful for magnetic resonance imaging applications.
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