The Energies of Particle Accelerators

Chapter 17 explores the evolution of particle accelerators, which probe the fundamental structure of matter by imparting high kinetic energy to charged particles. The first major accelerator, the cyclotron, invented by Ernest Lawrence in 1932, achieved 1.25 MeV. Its design faced relativistic limitations, leading to innovations like the synchrocyclotron (1946, 380 MeV) and synchrotron-based machines such as the Cosmotron (1952, 3.3 GeV) and Bevatron (1954, 6.2 GeV). CERN’s Proton Synchrotron (1959) reached 28 GeV, followed by Brookhaven’s AGS (1960, 33 GeV) and SLAC (1966, 50 GeV). The energy frontier expanded with the ISR (62 GeV), SPS (450 GeV), Tevatron (1987, 1.96 TeV), and the Large Hadron Collider (2010, 13 TeV). Early growth was exponential, with energy doubling every 1.87 years until 1959, then slowing to a 7-year doubling time due to complexity. Future plans include CERN’s proposed Future Circular Collider, aiming for 100 TeV by the mid-21st century.