Abstract: According to the invention, use is made of a coaxial cavity (CC) resonating according to the fundamental mode and the electrons are injected in the median plane perpendicular to the axis. The beam can be accelerated several times along different diameters (d1,d2) by reinjecting into the cavity and using electron deflectors (D1,D2).

Abstract: A coaxial cavity (CC) resonating in accordance with the fundamental mode and the electrons are injected into the median plane perpendicular to the axis. Application to the irradiation of various strip-like substances.

Abstract: A linear charged particle accelerator incorporating drift tubes is disclosed. The linear charged particle accelerator is of the type comprising, within a conductive envelope, drift tubes defining between them acceleration gaps of lengths such that in two successive gaps the longitudinal component of the electrical field has an identical modulus having in each gap, a supplementary drift tube arranged substantially in the center of the gap between two adjacent tubes and electrically connected to the envelope by an impedence, the addition of the supplementary drift tubes making it possible to reduce the diameter of the drift tubes and increase the effective linear shunt impedence of the accelerator structure.

Abstract: Ion beam buncher--debuncher of the type having a resonant structure supplied by a high frequency or hyperfrequency generator, said structure comprising a cylindrical wall closed by two lateral faces respectively traversed by a supply pipe and a discharge pipe for the beam, together with a sliding tube arranged between the said pipes and defining with the supply pipe a first gap and with the discharge pipe a second gap, the ion beam being introduced into the said structure by the supply pipe firstly undergoing in the first gap a first action on the part of the electrical field therein, then traversing the sliding pipe and finally undergoing in the second gap a second action on the part of the electrical field therein and leaving the structure by the discharge pipe, wherein the two gaps defined by the sliding tube and the supply and discharge pipes are extremely asymmetrical, one of the two gaps offering the ion beam a much weaker electrical field than that offered by the other gap, so that the action exerted o

Abstract: The accelerating structure comprises a resonant cavity within which are placed at least two longitudinal conducting supports. One end of each support is electrically connected to the cavity in such a manner as to be in quarter-wave resonance and in opposite phase. Drift tubes are electrically connected alternately to each of the two supports. The supports are electrically connected respectively to each end of the lateral face of the cavity.