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Keywords: Cyclotron with glowing beam.jpg Retrieved from en wikipedia org 60-inch cyclotron circa 1939 showing beam of accelerated ions perhaps protons or deuterons escaping the accelerator and ionizing the surrounding air causing a blue glow contrast enhanced This image is a work of the Lawrence Berkeley National Laboratory and as such is a work of the US government and therefore in the public domain PD-USGov Cyclotrons |