Kubudirira kwekutanga kwekukurumidzira maerekitironi achishandisa electromagnetic induction kwakaitwa muna 1942 naDonald Kerst. Betatron yake yekutanga yakasvika masimba e2.3 MeV, nepo mabetatroni akazotevera akasvika 300 MeV. Muna 1947, synchrotron radiation yakawanikwa ne70 MeV electron synchrotron paGeneral Electric. Iyi radiation yakakonzerwa nekumhanyisa kwema electron kuburikidza nemagineti munda pavaifamba padyo nekumhanya kwechiedza.Nechiedza che 1.5 GeV simba, iro rekutanga-simba rakakwira-simba Mubvunzo: Chii chakaitwa naDonald Kerst mu betatron inital?
2.3 MeV