The linac within the Australian Synchrotron uses radio waves from a series of RF cavities at the start of the linac to accelerate the electron beam in bunches to energies of 100 MeV. A<unk>  (often shortened to linac) is a type of<unk><unk>  that accelerates charged subatomic<unk> s or ions to a high speed by subjecting them to a series of oscillating electric potentials along a<unk>  beamline. The principles for such machines were proposed by Gustav Ising in 1924, while the first machine that worked was constructed by Rolf Widerøe in 1928 at the RWTH Aachen University. Linacs have many applications: they generate X-rays and high energy electrons for medicinal purposes in radiation therapy, serve as<unk>  injectors for higher-energy<unk> s, and are used directly to achieve the highest kinetic energy for light<unk> s (electrons and positrons) for<unk>  physics. The design of a linac depends on the type of<unk>  that is being accelerated: electrons, protons or ions. Linacs range in size from a cathode ray tube (which is a type of linac) to the linac at the SLAC National<unk>  Laboratory in Menlo Park, California.
Linear particle accelerator
Plaque radiotherapy
Chemoradiotherapy
Fast neutron therapy
EMedicine
External beam radiotherapy
Tomotherapy
Radiation therapy