The name chosen for the synchrotron was Cosmitron (representing an ambition to produce cosmic rays) but was changed to Cosmotron to sound like the cyclotron. The beam size of 64 × 15 cm and an energy goal of about 3 GeV determined the machine parameters. The synchrotron had a 75-foot/22.9-meter diameter. It consisted of 288 magnets each weighing 6 tons and providing up to 1.5 T, forming four curved sections. The range of field change was kept within limits by first accelerating particles to an intermediate energy in another accelerator and then injected into the Cosmotron. The straight sections without magnets were worrisome because there was no focusing and the betatron oscillations would change suddenly and might swing wildly. But, all these major problems were overcome.