METHOD AND DEVICE FOR ELECTRON BEAM IRRADIATION

摘要

PROBLEM TO BE SOLVED: To make uniform the dose of an electron beam in each spot in the irradiating direction by irradiating an object with an electron beam emitted from a concavely formed section of an irradiation window in the state of the object being placed in a concavely formed space where a electron beam is scanned. SOLUTION: A electron beam 8 is scanned by a magnet 5 that generates an alternating field in a base of an electron beam horn 6. The alternating field is controlled so as to make the scanning waveform a triangular-waveform. After the electron beam 8 is deflected toward the center side in accordance with a deflection angle by deflection magnet plates 19A and 19B, the beam 8 is emitted from an radiation window 7 concaved in a U-shape into the air. An object 20 that is intruded by a mesh conveyer 14 into the u-shaped concave radiation window 7 is irradiated with uniform energy as far as to a bottle body 25. Moreover, a both bottom which hardly transmit the electron beam is irradiated with electron beam 18 reflected of the scanning electron beam 8 from a reflector 12. Thereby almost uniform dose in given in every spot of the object 20.