LASER ION SOURCE WITH MULTIPOLAR MAGNETIC FIELD Russian patent published in 2010 - IPC H01J37/08 

FIELD: physics.

SUBSTANCE: invention relates to ion sources designed for charged particle accelerators. The laser ion source with multipolar magnetic field consists of a target, a laser, a passage channel made in form of a metal pipe whose central longitudinal axis coincides with the initial direction of hydrodynamic motion of the plasma stream from the target, an ion collection system fitted on the central longitudinal axis of the passage channel, magnets fitted in the said channel such that, they form a multipolar magnetic field inside the channel on the entire length between the target and the ion collection system, with field lines being perpendicular to the longitudinal axis of the channel and strength of this field while approaching zero to the central longitudinal axis increases in the region of the walls of the channel. Electromagnetic coils are also fitted on the channel such that, they create a longitudinal, axially-symmetrical magnetic field in the channel between the target and the ion collection system.

EFFECT: due to superposition of magnetic fields created by magnets and electromagnetic coils on the channel, a multipolar magnetic field of complex configuration, which can effectively keep charged particles in the laser plasma, is created.

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