Abstract: The present invention concerns a device for treatment by hyperthermia, comprising unipolar probes of the implantable type, and comprising circuitry for modifying the distribution forms of the electrical field applied to an aera to be treated.

Abstract: The invention pertains to an apparatus for hyperthermic treatment, especially designed for deep hyperthermia. The treatment apparatus comprises at least two generators operating at different frequencies in such a way as to prevent any phase correlation between the waves delivered by the generators.

Abstract: A multioperation accelerator simulating more especially cobalt radiation. According to the invention, an electron accelerator of average energy and a set of targets and filters are provided so as to obtain at least one penetration curve similar to that of cobalt and other closely related curves.

Abstract: A device is provided for adding to signals of the same frequency but of any phases and amplitudes. The device has two inputs and two outputs. The outputs each deliver a combination of the signals fed to the input. In a particular application, corresponding to reinjection of a recovery signal from a linear accelerator, the combination is an addition. At a first output of the device the whole of the added signal is recovered for reinjection, at a second output of the device the signal is zero. The efficiency of the device is total.

Abstract: The present invention concerns a device for treatment by hyperthermia, comprising unipolar probes adapted to be disposed in an area to be treated of a patient, and comprising vector tubes intended to be implanted in the said area to be treated and to contain, at each hyperthermia session the said unipolar probes.

Abstract: A particle accelerator with frequency correction is provided in which an electromagnetic wave, supplied by a generator, is injected into a cavity through a wave guide. A frequency corrector device comprises two non directional couplers taking directly from said wave guide a standing wave from which an error signal is elaborated and applied to said generator for correcting the frequency of the electromagnetic wave.

Abstract: Cyclotron permitting a better utilization of the power when an internal target is used. According to the invention, vertical defocussing coils are arranged along a circular path across which is arranged the target. The elongated, curved coils have the effect of destroying the vertical focusing and consequently widen the beam before impact takes place with the target, so that the latter is not damaged. Application to the production of radioisotopes.

Abstract: The invention provides a block for partially limiting a radiation beam, allowing a first part of this beam to be limited corresponding to a first maximum half angle of opening.This rectilinearly movable block comprises a cylindrical active surface.Because of this active surface, said block defines new limits for the beam without modifying the starting orientation of this active surface in dependence on the positions which it may occupy through its rectilinear movement.

Abstract: An irradiation head permitting the positioning of the area to be treated and the checking of this position. This irradiation head, which is disposed downstream of the neutron target, is provided which a turret carried by a supporting plate and which can rotate about an axis zz perpendicular to said plate. The supporting plate has a central opening A of axis ZZ coinciding with the axis of the useful neutron beam and the axis of the collimator. The turret has three openings a.sub.1, a.sub.2, a.sub.3 which can successively face the opening A in accordance with the axis ZZ. Two of the openings a.sub.1, a.sub.2 are respectively associated with a light source S.sub.1 and an X-ray source S.sub.2 emitting beams of mean paths f.sub.1 and f.sub.2 equidistant with respect to axis zz, these beams being respectively designed for the positioning of the area to be treated and the checking of this position.

Abstract: The particle-accelerating device comprises a charged-particle source, a linear accelerating structure formed by a series of accelerating resonant cavities, an electromagnetic wave generator for emitting a signal to be injected into at least one of the resonant cavities. Means are provided for applying a pulsed high voltage to the particle source and for scanning a target with the pulsed beam of accelerated particles. The electromagnetic wave generator comprises a thermionic tube having a cathode, an anode and at least one grid. At least one of the resonant cavities is electromagnetically coupled to the grid-anode space of the tube.

Abstract: An irradiation apparatus for obtaining an irradiation beam having precise and easily adjustable dimensions. This apparatus comprises more particularly a secondary collimation device having an axis Y--Y, removably fixed to the mobile arm of the irradiation apparatus and comprising a conical pot, two pairs of frames which support collimating plates and are movable about shafts fixed to said conical pot, each of said frames being connected to said conical pot by means of a compass system formed from legs hinged together about shafts. With said frames are associated mobile antipenumbra plates whose position is checked by means of a feeler system.

Abstract: The invention discloses a resonant system for accelerating charged particles of the cyclotron type allowing this cyclotron to operate successively at two resonant frequencies f.sub.1 and f.sub.2 =mf.sub.1 (m=2 for example) without modification of the structure, this resonant system comprising a sealed enclosure connected to ground and in which is disposed at least one hollow electrode or "Dee" having the shape of a sector, the enclosure and the "Dee" being associated with a resonant element formed from a tubular external conductor closed at one of its ends by a metal plate and whose other end opens into the enclosure and, placed inside this external conductor, two internal conductors connected together, at one of their ends, by means of a connecting element determining with the external conductor a capacity C variable in value, for adjusting the operating frequencies f.sub.1 and f.sub.2 of the cyclotron and more particularly the ratio f.sub.1 /f.sub.2.

Abstract: An achromatic magnetic deflection device for deflecting by an angle .phi. between .pi. and 2.pi. a beam of charged accelerated particles having different momentum. This device comprises an electromagnet provided with pole pieces delimiting three contiguous sectors, the whole of these sectors, having an axis of symmetry XX, presenting flat input E and output S faces and common faces F.sub.1 and F.sub.2 in an arc of a circle, the position, the radius of curvature of these faces F.sub.1, F.sub.2 as well as the value of the magnetic induction in the sectors being chosen so that the different paths are substantially orthogonal both to faces F.sub.1, F.sub.2 and to axis XX.

Abstract: An apparatus for thermal treatment of the human body, using electromagnetic waves (200 to 2500 Mc/s) and radiometric receivers for monitoring and possibly controlling the temperature reached by the living tissues. A generator at ultra high frequency delivers a power of about one Watt into a coaxial cable terminated by a probe emitting electromagnetic waves in the organ to be heated by dielectric losses in the medium. A multichannel receiver, switched at intervals, analyzes the radiation reemitted by the living tissues through the probe, then utilized as a receiving antenna. The temperature reached in a region surrounding the probe is deduced therefrom and can be utilized for controlling the power emitted through a servocontrol system.

Abstract: A monitoring system transparent to ionizing radiation, designed for measuring the position, intensity, uniformity and directivity of a radiation beam, comprises two or three superimposed ionization chambers respectively provided with respective disk electrodes. One electrode is of smaller area than the other electrode or electrodes, the latter being substantially equal to the cross-sectional area of the radiation beam. Circuits for processing the signals furnished by the different electrodes are associated with comparators and with a safety system which readjusts the beam or deactivates the radiation source in the event that certain "threshold" values are exceeded, indicating a deviation of the beam from a centered position.

Abstract: Apparatus for irradiating the two opposite faces of a target by means of a scanning beam and comprising a magnetic deflection system formed by an electromagnet provided with two pole pieces disposed downstream of the target to be irradiated, the length of the pole pieces corresponding to the amplitude of the scanning beam in such a way that, if .theta.=.theta..sub.1 +.theta..sub.2 is the total scanning angle, the scanning beam of angle .theta..sub.1 impinges on one face of the target, while the scanning beam of angle .theta..sub.2 =.theta.-.theta..sub.1 is deflected in the magnetic deflection system and irradiates the other face, the polepieces having a face, so-called useful face, facing the other face of the target and comprising several sections with different curvatures for obtaining a reflected beam substantially perpendicular to this other face of the target.

Abstract: Treatment plant for treating a fluid formed by waters and sludges and comprising a decanting system; a first centrifuging system for separating, on the one hand, the spent waters and, on the other hand, the sludges formed by organic compounds containing or not heavy metals and the sludges formed by higher-density mineral compounds; an irradiation device for irradiating, by means of an accelerated electron beam for example, the sludges formed by organic compounds and especially those containing heavy metals so as to convert them into mineral compounds which are less toxic and have a high density; a second centrifuging system for subsequently separating and eliminating these mineral compounds.

Abstract: An apparatus for treating waste-waters and sludges and using an irradiation beam of accelerated electrons, comprises a treatment circuit c equipped with valves, an electromagnetic regulator providing a constant flow of the fluid to be treated by the irradiation beam, systems for controlling the flow of fluid and for controlling the characteristics of the irradiation beams, a microprocessor associated with the flow control systems for controlling at least the automatic closure of a shut-off valve and the opening of a purge valve.

Abstract: A linear accelerator for generating a beam of charged particles accelerated within a wide energy range without modifying the microwave energy injected into the accelerator structure, this accelerator structure comprising a bunching section and an accelerating section respectively constituted by a plurality of resonant cavities, the cavities of the bunching section being electromagnetically coupled in such a manner that two adjacent cavities are phase-shifted of .pi. one with respect to the other, these bunching and accelerating sections being respectively supplied by a microwave generator delivering a microwave signal w divided, by means of a combined coupler and phase shifter, into two microwave signals w.sub.1, w.sub.2 respectively injected into the accelerating and bunching sections with predetermined amplitudes and phases.

Abstract: A compact accelerating structure comprises an accelerating section and a complementary section which may be used as a bunching section and/or a preaccelerating section, this complementary section being constituted by a first cavity and a second cavity joined to one another and electromagnetically coupled with one another in a direct manner, the second cavity, which is adjacent to the accelerating section, having a length L and being electromagnetically coupled to the first cavity and to the accelerating section in such a manner that the electromagnetic accelerating field is zero in this second cavity.