关键词：太阳能电池；辐射测量；太阳能电板
摘 要：Space solar sheet (SSS) being currently under development is a quite unique and Japan's original devise for generating electricity in space. There are two kinds of SSS: one is a film-type SSS using transparent polymer film and the other is glass-type SSS (G-SSS) using a coverglass. Space solar sheet basically possesses 15 paper-like Ⅲ-Ⅴ multi-junction solar cells connected in five series and three parallel rows. The cells are laminated with the transparent polymer film or coverglass. To realize G-SSS, features of flexibility, toughness (not crack easily) and high radiation tolerance are inevitably required for the coverglass. Optical degradation of the coverglass caused by space radiation is particularly important since it decreases the amount of transmitted sunlight falling on solar cells and degrades the cell output power. Hence, we evaluated a radiation tolerance of a new coverglass for G-SSS.