ABSTRACT
New radiation therapy techniques such as Tomotherapy and Stereotactic radiotherapy require compact and higher power electron accelerators. In this paper a design of 10 MeV, 450 mA, compact, and hybrid standing wave C-band [5712 MHz] linear accelerator with peak power of 7 MW is presented to fulfil the demands of such new radiation therapy techniques. Standing wave structure that operates at [PI]/2 mode has been chosen for the design. Two different coupling techniques were utilized in the structure design; side coupling is used for regular accelerating section while the on-axis coupling is used in buncher section. A special hybrid cell is designed to connect the aforementioned sections such that the first half of this cell uses on axis coupling and fit to the buncher cell dimensions and the second half uses side coupling and fit to the regular cell dimension. Different cells of the design have been optimized using the computer, code SUPERFISH. PARMELA code is used to simulate the electrons' trajectories along the whole structure. Results from PARMELA indicate that the final energy is 10 MeV; the transmission ratio is 44%, and good energy spectrum with 18.6% span from the peak energy