A wideband bandpass filter includes an RF input terminal, an RF output terminal, a plurality of electrically tunable coupling capacitors coupled in series between the RF input and output terminals, and a plurality of resonating circuits each including an electrically tunable resonator capacitor coupled to one of the coupling capacitors. The rolling compensation device may be arranged kinematically in parallel to the spring device. An irradiation position of the charged-particle beam is corrected with the use of the drift amount. Using the first and second data, a computer system may determine a maximum possible flow of the item within the distribution network.