The invention relates to an atmospheric-pressure cold plasma generator system and to a method for modifying the properties of the inner surfaces of small diameter dielectric tubes. The claimed system comprises two electrodes (3 and 6), a small RF cavity electrode (3) placed inside a tube (4) to be treated and a ring-shaped mass electrode (6) mounted outside the tube (4), the two electrodes (3 and 6) being fastened and connected by means of some long and stiff conductors (2 and 7) to an adapter (5) which comprises an RF cable box.
The invention relates to a dosimeter of the optical fibre calorimeter type employed to measure the integrally absorbed dose in irradiation with accelerated particle beams.