Abstract: The present invention is drawn to a gantry for an ion-optical system comprising an ion source and three bending magnets for deflecting an ion beam about an axis of rotation. A plurality of quadrupoles are also provided along the beam path to create a fully achromatic beam transport and an ion beam with different emittances in the horizontal and vertical planes. Further, two scanning magnets are provided between the second and third bending magnets to direct the beam.

Abstract: A device and a method for converting flow of charge into a frequency signal is proposed. The device comprises: two parallel circuit branches (Z; Z′) which are arranged to receive flow of charge alternately and each of which has a series arrangement of a switching element (40; 40′), an integrator (10; 10′) and a comparator (30; 30′), wherein the switching elements (40; 40′) serve to supply the flow of charge to one of the two circuit branches (Z; Z′) and in the receiving circuit branch (Z; Z′) the integrator (10; 10′) serves to integrate the flow of charge and is configured to be resettable and the comparator (30; 30′) is configured to emit a signal when the integrated flow of charge corresponds to a specific threshold value signal.

Abstract: The invention relates to an ionization chamber for ion beams and to a method of monitoring the intensity of an ion therapy beam by way of such an ionization chamber. For that purpose, the ionization chamber includes a chamber housing, a beam inlet window and a beam outlet window, a chamber volume filled with counting gas, a high-voltage anode and a high-voltage cathode, wherein the ionization chamber is constructed flat and sandwich-like from plate-shaped large-surface-area structures of the above-mentioned components, which are aligned orthogonally relative to the axis of the ion beam, and a centrally arranged large-surface-area orthogonally aligned plate-shaped counting anode is surrounded on both sides by a large-surface-area plate-shaped high-voltage cathode consisting of two parallel cathode plates, and the chamber housing consists of a housing frame, which frames a square ionization chamber volume, and on which frame the beam inlet window and the beam outlet window are mounted gas-impermeably.