Abstract: An undulator providing an increased variable wavelength range of an radiation light. An electron beam, interacting with a microwave as a traveling wave, propagates in a sinuous curve in a waveguide. In the course of propagation, a radiation light is emitted in the direction of propagation of the electron beam. The wavelength .lambda. of the radiation light emitted may be changed greatly by varying the frequency of the microwave.

Abstract: A beam supply device for supplying a particle or radiation beam to therapy or experiment equipment includes a beam generation device 1, a pre-branching beam transportation device 2, a rotatable deflection electromagnet 3, a rotatable beam transportation device 4, and a plurality of beam utilization rooms 5 disposed around the rotational axis of the rotatable deflection electromagnet 3 at a predetermined distance therefrom. The rotatable deflection electromagnet 3 and the rotatable beam transportation device 4 are rotated together to a predetermined rotational angle, such that the beam is guided to the room in which the beam is to be utilized.