• S. Ito, H. Matsuzaki, A. Morita
  NEM, Tokyo

The 1.7 MV tan­dem ac­cel­er­a­tor RAPID (Ruther­ford Backscat­ter­ing Spec­tro­scop­ic An­a­lyz­er with Par­ti­cle In­duced X-ray Emis­sion and Ion Im­plan­ta­tion De­vices), the Uni­ver­si­ty of Tokyo has been ded­i­cat­ed to var­i­ous sci­en­tif­ic and en­gi­neer­ing stud­ies in a wide range of fields by the ion beam anal­y­sis avail­abil­i­ty, in­clud­ing RBS (Ruther­ford Backscat­ter­ing Spec­troscopy), PIXE (Par­ti­cle in­duced X-ray emis­sion) and ion im­plan­ta­tion. Total ac­cel­er­a­tor op­er­a­tion time amount­ed 9,358 hours since its in­stal­la­tion with the high­est an­nu­al op­er­a­tion time record­ed in 2007. RAPID-PIXE anal­y­sis sys­tem has been con­tribut­ed to many en­vi­ron­men­tal stud­ies by an­a­lyz­ing el­e­men­tal com­po­si­tion of water and sed­i­ments sam­ples. It is also ap­plied to the anal­y­sis of sev­er­al cul­tur­al her­itages such as a works of gild­ed frame from Re­nais­sance in Italy. Re­cent­ly, the low level ion ir­ra­di­a­tion sys­tem was also de­vel­oped and ap­plied for the study of CR-39 track de­tec­tor with pro­ton beam.