ELECTRON BEAM IRRADIATION METHOD AND ITS DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an electron beam irradiation method and its device capable of unifying electron beam absorption dose in each part of scanning direction, avoiding uneven sterilization of a bottle and preventing degradation of quality by the electron beam irradiation in the case emitting electron beam to an object such as foods and drink bottles even if the objects have different thickness. SOLUTION: An electron beam output from an electron beam generation means 1 is scanned by a scanning means and emitted to the object such as vessel 20 with different thickness at every part along the scanning direction. In this case, the scanning velocity of the electron beam is decreased at thick part of the object and increased at thin part to make the ratio of the electron beam transmission rate to the scanning velocity at each portion constant in the scanning direction in the object and to make the electron beam absorption dose of the object uniform.