power supply - supplies power to the modulator

modulator - is a pulse forming network that supplies pulsed DC power to the klystron/magnetron and also sends a  signal to the electron gun to fire electrons

klystron/magnetron - converts pulsed DC power into microwave radiation that is supplied to the accelerator tube

electron gun - supplies the electrons to the accelerator tube on command from the modulator

wave guide system - copper tubes that efficiently transport microwave energy from the klystron/magnetron to the accelerator tube

accelerator tube - copper tube with washers placed 1/4 wavelength apart of the incoming microwave wave frequency. (cannot use a regular x-ray tube because of the high voltage we use / we could not insulate at these high voltages)

bending magnet - bends the electron beam as it emerges from the accelerator tube (90 or 270 degrees)

primary fixed collimators - determine the maximum extent of the radiation field (cannot be moved)

carousel - rotating disk that houses the x-ray beam flattening filters and the electron beam scattering foil

Scattering Foil – used when treating with electron and it spreads the electron beam across the whole field

Flattening Filters – give a flat beam profile across the field of the patient

2 ionization chambers - placed at each side of the beam to maintain desired dose (if one fails the other is a backup)

adjustable collimators (secondary) - used to give appropriate field sizes for the treatment fields

Magnetron – produces microwaves for use in low energy machines (note really used anymore)

Klystron – produces microwaves for use in higher energy machines (10 and up / what is in most LINAC’s today)