用于天体物理学应用的弯曲X射线探测器
Curving X-ray detectors for astrophysics applications
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中文总结 AI 辅助
该研究针对下一代X射线光学器件的焦平面设计挑战，基于MIT林肯实验室技术实现了背照式大格式CCD的弯曲，验证了其曲率、暗电流及光谱性能，证明弯曲大格式X射线传感器可实现且工艺可扩展。
中文摘要 AI 辅助
下一代X射线光学器件将彻底改变高能天体物理学领域，但它们为配套焦平面的设计带来了诸多挑战。特别是，焦面是弯曲的，需要许多小型平面传感器才能实现大视场。我们基于MIT林肯实验室的技术开展工作，将传感器本身弯曲，以提升图像质量并降低复杂度。将该技术应用于具有明确X射线响应特性的背照式大格式CCD，我们描述了相关工艺，并报告成功将功能正常的背照式CCD弯曲至2.5米的曲率半径，实现小于1微米的均方根曲率偏差。我们确认暗电流无明显增加，且在0.3-6 keV能段的光谱性能仍保持优异。这些结果表明，弯曲的大格式X射线传感器是可实现的，且该工艺可扩展至其他架构的硅探测器，包括有源像素传感器。
英文摘要
Next-generation X-ray optics will revolutionize high-energy astrophysics, yet they present several challenges to design a complementary focal plane. In particular, the focal surface is curved, requiring many small, flat sensors to achieve a large field. We present work building on MIT Lincoln Laboratory technology to curve the sensor itself, improving image quality and reducing complexity. Applying this technology to back-illuminated, large-format CCDs having well-characterized X-ray response, we describe the process and report success curving functional BI CCDs to a 2.5-m radius of curvature, achieving RMS curvature deviations less than 1 micron. We confirm that there is no appreciable increase in dark current and that the spectroscopic performance across the 0.3-6 keV band remains excellent. These results demonstrate that curved, large-format X-ray sensors are realizable, and the process can be extended to silicon detectors with other architectures, including active pixel sensors.
发表机构
- Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology（麻省理工学院卡弗里天体物理学与空间研究学院）
- Lincoln Laboratory, Massachusetts Institute of Technology（麻省理工学院林肯实验室）
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