a type of particle accelerator for producing high-energy beams of electrons, having an alternating magnetic field to keep the electrons in a circular orbit of fixed radius and accelerate them by magnetic induction. It produces energies of up to about 300 MeV
betatron in American English
(ˈbeɪtəˌtrɑn)
US
noun
an electron accelerator which uses a rapidly changing magnetic field to acceleratethe particles and maintain them in a focused circular path