Beam current variation system for a cyclotron
AssigneeVarian Medical Systems Particle Therapy GmbH
InventorsThomas Stephani, Heinrich Rocken
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Abstract
Beam current variation system for a cyclotron, arranged in the inner center of the cyclotron, downstream from the ion source generating the charged particle beam, the system comprising a deflector system powered by a voltage and a collimator. The beam is dumped in the collimator, if the deflector system (10; 20, 21) is not powered, and the beam is switched on by powering the deflector system with a voltage.
Claims14
A beam current variation system for a cyclotron, arranged in the inner centre of the cyclotron, downstream from an ion source generating a charged particle beam, the system comprising a deflector system powered by a voltage for deflecting the beam and a collimator, characterized in that the beam is dumped in the collimator, when the deflector system is not powered, and in that the beam is switched on by powering the deflector system with a voltage.
Dependencies are inferred from the claim text.