Abstract
The linear accelerator has two stationary accelerating sections and a rotating magnetic deflection system which allows the beam to be used at any angle, and also uses a scanning magnet for beam flattening and moveable lead and aluminium jaws as collimator. This machine is designed to produce 25 MV photons and electrons in the range 7-32 MeV in steps of 3 MeV. The betatron uses scattering foils of different material and thickness for beam flattening and brass cones of fixed dimensions as collimator and produces 19 MV photons and electrons in the range 6-18 MeV. Appreciable differences were found in beam energy, dose distribution, flatness, surface dose, position of d-matrix and slope of fall-off were described.
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