Ion Beam Applications S.a.

Sck Cen Son

Michel Abs

Willem Kleeven

Frédéric Stichelbaut

Jean-Michel Geets

Szymon Zaremba

Jarno Van De Walle

Denis Joassin

Jérémy Brison

Denis Deschodt

Jean-Claude Amelia

Sébastien De Neuter

Michel Ghyoot

Jeremy Brison

Samy Bertrand

Kleeven Willem,

In accordance with the embodiments of the present disclosure, a rack comprising a frame having first vertical posts on a first side and second vertical posts on a second side, between which a plurality of RF amplifier modules are mounted, is provided. The RF power outputs of the RF amplifier modules are connected to inputs of an RF power combiner to deliver a combined RF power output. The RF power combiner is arranged at least partially in at least one of a first volume between the first vertical posts of the frame or a second volume between the second vertical posts of the frame, thereby reducing a footprint of the rack.

Rack comprising a high power RF amplifier

In accordance with the embodiments of the present disclosure, a rack comprising a frame having first vertical posts on a first side and second vertical posts on a second side, wherein the first side is opposite the second side, between which a plurality of RF amplifier modules are mounted, is provided. The RF power outputs of the RF amplifier modules are connected to inputs of an RF power combiner to deliver a combined RF power output. The RF power combiner is arranged at least partially in at least one of a first volume between the first vertical posts of the frame or a second volume between the second vertical posts of the frame, thereby reducing a footprint of the rack.

A vario-energy electron accelerator includes a resonant cavity consisting of a closed conductor, an electron source injecting a beam of electrons into the resonant cavity, an RF system coupled to the resonant cavity and generating an electric field in the resonant cavity, magnet units centred on a mid-plane and generating a field in a deflecting chamber in fluid communication with the resonant cavity, the magnetic field deflecting along a first deflecting trajectory of adding length an electron beam exiting the resonant cavity along a first radial trajectory to reintroduce it into the resonant cavity along a second radial trajectory, an outlet for extracting along an extraction path an accelerated electron beam from the resonant cavity towards a target, wherein at least one of the magnet units is adapted for modifying the first deflecting trajectory to a second deflecting trajectory, allowing a variation of the energy of the electron beam.

Vario-energy electron accelerator

An electron accelerator is provided. The electron accelerator comprises a resonant cavity comprising a hollow closed conductor, an electron source configured to inject a beam of electrons, and an RF system. The electron accelerator further comprises a magnet unit, comprising a deflecting magnet. The deflecting magnet is configured to generate a magnetic field in a deflecting chamber in fluid communication with the resonant cavity by a deflecting window. The magnetic field is configured to deflect an electron beam emerging out of the resonant cavity through the deflecting window along a first radial trajectory in the mid-plane (Pm) and to redirect the electron beam into the resonant cavity through the deflecting window towards the central axis along a second radial trajectory. The deflecting magnet is composed of first and second permanent magnets positioned on either side of the mid-plane (Pm).

Compact electron accelerator comprising permanent magnets

An electron accelerator comprising a resonant cavity, an electron source, an RF system, and at least one magnet unit is provided. The resonant cavity further comprises a hollow closed conductor and the electron source is configured to radially inject a beam of electrons into the cavity. The RF system is configured to generate an electric field to accelerate the electrons along radial trajectories. The at least one magnet unit further comprises a deflecting magnet configured to generate a magnetic field that deflects an electron beam emerging out of the resonant cavity along a first radial trajectory and redirects the electron beam into the resonant cavity along a second radial trajectory. The resonant cavity further comprises a first half shell, a second half shell, and a central ring element.

Compact electron accelerator comprising first and second half shells

The present disclosure relates to a magnet pole for an isochronous sector-focused cyclotron having hill and valley sectors alternatively distributed around a central axis, Z, each hill sector having an upper surface bounded by four edges: an upper peripheral edge, an upper central edge, a first and a second upper lateral edges. The upper surface of at least one hill sector may further include: a recess extending over a length between a proximal end and a distal end along a longitudinal axis intersecting the upper peripheral edge and the upper central edge. The recess may be separate from the first and second upper lateral edges over at least 80% of its length, and a pole insert having a geometry fitting in the recess may be positioned in, and reversibly coupled to the recess.

Pole insert for cyclotron

The present disclosure relates to a magnet pole for an isochronous sector-focused cyclotron having hill and valley sectors alternatively distributed around a central axis, Z, each hill sector having an upper surface bounded by four edges: an upper peripheral edge, an upper central edge, a first and a second upper lateral edges. The upper peripheral edge of a hill sector may be an arc of circle whose center is offset with respect to the central axis, and whose radius, Rh, is not more than 85% of a distance, Lh, from the central axis to a midpoint of the upper peripheral edge. Furthermore, the midpoint may be equidistant to the first and second upper distal ends.

Peripheral hill sector design for cyclotron

The present disclosure relates to compact isochronous sector-focused cyclotrons having reduced dimensions and weight compared with state of the art cyclotrons of same energies. In one implementation, a cyclotron may include two pole magnets facing each other in a chamber defined by a yoke having base plates and flux return yokes forming a lateral wall of the chamber. The magnet poles may include between three and eight hill sectors alternating with a same number of valley sectors distributed about a central axis. The lip of the abyssal opening may be positioned at a distance from the corresponding valley peripheral edge. The flux return yoke may have a thickness in the portions facing valley sectors, such that the ratio of the product of the distance times the thickness to the square of the distance of the peripheral edge to the central axis is less than 5%.

Compact cyclotron

The present invention is related to an apparatus for transporting a charged particle beam. The apparatus may include means for scanning the charged particle beam on a target, a dipole magnet arranged upstream of the means for scanning, at least three quadrupole lenses arranged between the dipole magnet and the means for scanning and means for adjusting the field strength of said at least three quadrupole lenses in function of the scanning angle of the charged particle beam. The apparatus can be made at least single achromatic.

Particle beam transport apparatus

Disclosed embodiments include an electron accelerator, having a resonant cavity having an outer conductor and an inner conductor; an electron source configured to generate and to inject a beam of electrons transversally into the resonant cavity; a radio frequency (RF) source coupled to the resonant cavity and configured to: energize the resonant cavity with an RF power at a nominal RF frequency, and generate an electric field into said resonant cavity that accelerates the electrons of the electron beam a plurality of times into the cavity and according to successive and different transversal trajectories; and at least one deflecting magnet configured to bend back the electron beam that emerges out of the cavity and to redirect the electron beam towards the cavity.

Electron accelerator having a coaxial cavity

A variable rotating capacitor or RotCothat can be connected via a transmission lineto the deeof a synchrocyclotronso as to adjust a resonant frequency of the synchrocyclotron as a function of time and which comprises a cylindrical rotorand a cylindrical statorthat are coaxial with the Z axis. The rotor comprises a plurality of circumferentially-distributed rotor electrodesextending parallel to its rotation axis Z. The stator comprises a plurality of circumferentially-distributed stator electrodesextending parallel to the rotation axis Z. Each stator electrodeconsists of a single metal plate and all said plates are distributed over one and the same stator circumference. This makes it possible for the RF currents in the electrodes to be better distributed and thus reduces the local overheating. The present invention also relates to a synchrocyclotron comprising such a RotCo.

Variable rotating capacitor for synchrocyclotron

RF device () able to generate an RF acceleration voltage in a synchrocyclotron. The device comprises a resonant cavity () formed by a grounded conducting enclosure () and enveloping a conducting pillar () to a first end of which an accelerating electrode () is linked. A rotary variable capacitor () is mounted in the conducting enclosure at a second end of the pillar, opposite from the first end, comprising at least one fixed electrode (stator) () and a rotor () exhibiting a rotation shaft () supported and guided in rotation by galvanically isolating bearings (), said rotor () comprising one moveable electrode () possibly facing the stator (). When the shaft () rotates, the stator and the moveable electrode together form a variable capacitance whose value varies cyclically with time. The rotor () is galvanically isolated from the conducting enclosure () and from the pillar (). The stator () is connected to the second end of the pillar () or to the conducting enclosure (). The rotor is respectively coupled capacitively to the conducting enclosure or to the pillar. This makes it possible to dispense with sliding electrical contacts between the rotor and respectively the conducting enclosure or the pillar.

RF device for synchrocyclotron

An apparatus for transporting a charged particle beam is provided. The apparatus may include: means for scanning the charged particle beam on a target, a dipole magnet arranged upstream of the means for scanning, at least three quadrupole lenses arranged between the dipole magnet and the means for scanning, and means for adjusting the field strength of at least three quadrupole lenses in function of the scanning angle of the charged particle beam. The apparatus can be made at least single achromatic.

Particle beam transport apparatus and method of transporting a particle beam with small beam spot size

The present invention relates to a circular particle accelerator capable of modulating the particle beam current exiting the circular particle accelerator. The circular particle accelerator includes: an ion source for generating the particle beam; Dee electrode and counter-Dee electrode separated from each other by gaps for accelerating the particle beam, the counter-Dee electrode being grounded; a generator capable of applying an alternating high voltage to the Dee electrode, so as it is possible to have an electric field between the gaps; means for measuring the current intensity of the particle beam exiting the circular particle accelerator. It also comprises a regulator capable of modulating the Dee electrodes voltage amplitude (V) by comparing a given set point (I) of the current intensity of the particle beam and the measured value of the current intensity (I') of the particle beam.

Device and method for fast beam current modulation in a particle accelerator

The present invention relates to a dual-frequency resonant cavity () for cyclotron which includes a dee (), a pillar (), and a conducting enclosure () surrounding the pillar and the dee, an end of the pillar being connected to the base of the conducting enclosure and an opposite end of the pillar () supporting the dee (). The conducting enclosure and the pillar form a transmission line comprising at least three portions (), each portion having a characteristic impedance (Z, Z, Z). The characteristic impedance Zof the intermediate portion () is substantially lower than the characteristic impedances Zet Zof the two other portions (), which makes it possible to have the cavity resonate according to two modes in order to produce two distinct frequencies, without having to make use of moving components such as for example sliding short-circuits or mobile plates. The present invention also relates to a method for designing such a resonant cavity, based on the use of electromagnetic&#x2014;and radio frequency simulation tools.

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Bossière, Belgium

Michel Abs