Radiation measurements of a medical particle accelerator through a passive resonant cavity

Dose measurements of a Medical Linear Accelerator (LINAC's) performed through a passive resonant cavity are shown in this paper. The cavity is coupled through a magnetic loop with a coaxial transmission line loaded on a microwave envelope detector. Output signal has been documented while receiving electron currents ranging from several values. This paper shows the complete equivalency, in terms of global performance, of the current revelation performed by exploiting the cavitybeam interaction principle with the classical technology, based on ionization chambers, without need of high voltage. The most important point is that the resonant cavity system, by measuring the beam current, gives a direct measurement of a physical observable quantity directly related with the dose deposed by the beam.