AI 中文总结
BabyIAXO作为IAXO探路者，旨在提升灵敏度。其X射线光学器件采用混合设计，内芯用热压硼硅酸盐玻璃制造。利用相关技术优化热成型工艺，经多种表征和测试，该光学器件有望提升信噪比，实现特定PSF。
AI 中文摘要
BabyIAXO是国际轴子天文台（IAXO）的探路者，旨在大规模展示所有关键技术，同时将灵敏度比最近的CERN轴子太阳望远镜（CAST）实验提高约五倍。这种改进由X射线光学器件实现，其允许在磁孔横截面积比CAST大250倍以上的情况下，在探测器处保持高信噪比。该光学器件采用混合设计，由共轴的内芯和外日冕光学器件组成。内芯采用热压硼硅酸盐玻璃制造，外日冕采用冷压康宁柳树玻璃制造。利用为NuSTAR和HEFT光学器件开发的技术，重新优化并简化了内芯光学器件的热成型工艺。通过激光计量、X射线反射测量和原子力显微镜表征了独立玻璃基板的质量。开发了一种在微米尺度上产生光滑边缘的切割技术。使用玻璃-环氧树脂-石墨层的扁平堆叠来评估环氧树脂粘结层的性能。该光学器件预计将实现半功率直径（HPD）<90
英文摘要
BabyIAXO, a pathfinder for the International Axion Observatory (IAXO), is designed to demonstrate all key technologies at scale while achieving an improvement in sensitivity over the recent CERN Axion Solar Telescope (CAST) experiment by approximately a factor of five. Such improvement is enabled by the X-ray optics, which allow for maintaining a high signal-to-noise ratio at the detector despite a cross-sectional area of the magnetic bore being over 250 times larger than that of CAST. The optic employs a hybrid design consisting of co-aligned inner core and outer corona optics that share a common optical axis and vacuum vessel but differ in focal length and manufacturing approach. Both are segmented glass optics, with the inner core fabricated from thermally slumped borosilicate glass and the outer corona from cold-slumped Corning Willow glass. To fabricate the inner-core optic, leveraging techniques developed for NuSTAR and HEFT optics, we reoptimized and streamlined the thermal-forming procedure. The quality of free-standing glass substrates was characterized by laser metrology, X-ray reflectometry, and atomic force microscopy. We developed a cutting technique that produces smooth edges at the micron scale. We used flat stacks of glass-epoxy-graphite layers to evaluate the performance of the epoxy bondline. The optic is expected to achieve an on-axis point spread function (PSF) with a half-power diameter (HPD) of < 90", enhancing the signal-to-noise ratio by more than 55 times.
Comments9 pages, 5 figures, submitted to the Proceedings of SPIE Astronomical Telescopes + Instrumentation 2026 (paper 14146-56)
