Abstract: A fast electromagnet device (140) receives a high voltage from a pulse power supply through a coaxial cable and excites an electromagnet at high speed, so as to bend a charged particle beam. The fast electromagnet device (140) includes a kicker magnet (150) and an auxiliary circuit (160). The kicker magnet (150) is equivalent to a circuit element of a lumped constant circuit, is formed with a space penetrating in the traveling direction of the charged particle beams, instantaneously generates a magnetic field in the penetrated space with a high voltage applied, and bends the charged particle beams passing through the penetrated space. The auxiliary circuit (160) constitutes a matching circuit in combination with the kicker magnet (150), so that the input impedance of the matching circuit and the characteristic impedance of the coaxial cable connected to the input terminal of the matching circuit are matched.

Abstract: A fast electromagnet device (140) receives a high voltage from a pulse power supply through a coaxial cable and excites an electromagnet at high speed, so as to bend a charged particle beam. The fast electromagnet device (140) includes a kicker magnet (150) and an auxiliary circuit (160). The kicker magnet (150) is equivalent to a circuit element of a lumped constant circuit, is formed with a space penetrating in the traveling direction of the charged particle beams, instantaneously generates a magnetic field in the penetrated space with a high voltage applied, and bends the charged particle beams passing through the penetrated space. The auxiliary circuit (160) constitutes a matching circuit in combination with the kicker magnet (150), so that the input impedance of the matching circuit and the characteristic impedance of the coaxial cable connected to the input terminal of the matching circuit are matched.