Racetrack Microtron—Pushing the Limits

We consider three types of electron accelerators that can be used for various applications, such as industrial, medical, cargo inspection, and isotope production require small- medium-sized machines, namely classical microtron (CM), race-track (RTM), multisection linac. review the principles their operation, specific features beam dynamics in these discuss advantages weak points, compare technical characteristics. In particular, we emphasize intrinsic symmetry stability region microtrons. argue RTMs a preferable choice medium energies (up to 100 MeV) range potential applications widened, provided current losses are significantly reduced. article, analyze two possible solutions detail, increasing longitudinal acceptance an RTM using higher-order harmonic accelerating structure improving matching at injection.