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High average current betatrons for industrial and security applications

By: Agustsson, R.; Boucher, S.; Travish, G.; Rosenzweig, J.; Frigola, P.; O'Shea, F.; Ruelas, M.; Murokh, A.;

2007 / IEEE / 978-1-4244-0916-7


This item was taken from the IEEE Conference ' High average current betatrons for industrial and security applications ' The fixed-field alternating-gradient (FFAG) betatron has emerged as a viable alternative to RF linacs as a source of high-energy radiation for industrial and security applications. For industrial applications, high average currents at modest relativistic electron beam energies, typically in the 5 to 10 MeV range, are desired for medical product sterilization, food irradiation and materials processing. For security applications, high power x-rays in the 3 to 20 MeV range are needed for rapid screening of cargo containers and vehicles. In a FFAG betatron, high-power output is possible due to high duty factor and fast acceleration cycle: electrons are injected and accelerated in a quasi-CW mode while being confined and focused in the fixed-field alternating gradient lattice. The beam is accelerated via magnetic induction from a betatron core made with modern lowloss magnetic materials. Here we present the design and status of a prototype FFAG betatron, called the Radiatron, as well as future prospects for these machines.