Structures of retired components and KDP crystals irradiated by high fluence using synchrotron μ-XRF and μ-XRD

The structures of retired components and potassium dihydrogen phosphate (KDP) crystal irradiated by high fluence are investigated using the combined methods of synchrotron radiation micro-X-ray fluorescence with micro-X ray diffraction. The distributions of potassium, phosphorus, iron, and copper exhibited an apparent centralization on the crater. The changes between phosphorus and potassium were the same in KDP crystal irradiated by high fluence but were different for retired components. The irradiation of KDP crystal by high fluence produced K2H2P2O7 and KPO3 crystals during laser-induced damage, but K2H2P2O7 and K2H8(PO4)2P2O7 crystals were produced for retired components. KDP crystal irradiated by high fluence was dehydrated completely but the retired components were incompletely decomposed.