METHOD OF CONTROLLING BEAM OF CHARGED PARTICLES IN CYCLOTRON Russian patent published in 2009 - IPC G21K1/87 

FIELD: physics.

SUBSTANCE: method of controlling a beam of charged particles in a cyclotron involves focusing the beam in an axial injection system and turning the beam using the electric field of a spiral inflector from the axial direction in the axial injection system to the median plane of the cyclotron. The beam is further focused by the force of the electric field of the spiral inflector, which acts on particles diverging from the central trajectory in the direction across the direction of motion of the central particle on the central trajectory and across the direction of the turning force of the electric field, acting on the central particle moving on the central trajectory. Equipotential lines of the electric field in the inflector in the direction across the beam are concentric arc shaped.

EFFECT: significant reduction of axial dimensions and beam divergence at the output of the inflector, reduced longitudinal dimensions of the beam, best transmission coefficient of the beam in the cyclotron.

2 cl, 15 dwg