Transcription of Betatrons - MIT
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Betatrons - MIT
Betatrons32611 BetatronsThe betatron [ Kerst, Phys. , 841 (1940)] is a circular induction accelerator usedfor electron acceleration. The word betatron derives from the fact that high-energy electrons areoften called$-particles. Like the linear induction accelerator, the betatron is the circuitequivalent of a step-up transformer. The main difference from the linear induction accelerator isthat magnetic bending and focusing fields are added to confine electrons to circular orbits aroundthe isolation core. The beam acts as a multi-turn secondary. A single-pulsed power modulatoroperating at a few kilovolts drives the input; the output beam energy may exceed 100 MeV. Themaximum electron kinetic energy achieved by Betatrons is about 300 MeV.
4. Shaping of the voltage pulse shape is not important in the betatron. The beam is distributed uniformly around the transport tube; there is no need for longitudinal confinement. The betatron magnet is usually driven by a bipolar, harmonic voltage waveform that cycles the core between - Bs and +Bs.
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