Uniform Irradiation Systems Using A Rotatable Stage for Test Facilities of PEFP

A new irradiation facility has been developed using not only electric magnets but also a rotatable stage. Generally, the scanning method using magnets has been widely used in most of facilities. However, in this study another new methods have been developed: Two scanning method using a rotatable stage have been proved to make uniform irradiation-as large as 20 cm in diameter with more than 90% uniformity. The mechanical wobbler system makes the same effect as the wobbler system. And the beam is swept along the spiral path with a fixed and variable angular frequency during the scanning in the spiral scanning system.