Development and characterization of the latest X-ray SOI pixel sensor for a future astronomical mission
Development and characterization of the latest X-ray SOI pixel sensor for a future astronomical mission
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DOI：
10.1016/j.nima.2013.04.063
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发表时间：
2013-12
影响因子：
1.4
通讯作者：
S. Nakashima;S. G. Ryu;Takaaki Tanaka;T. Tsuru;A. Takeda;Y. Arai;T. Imamura;T. Ohmoto;A. Iwata
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文献类型：
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作者：
S. Nakashima;S. G. Ryu;Takaaki Tanaka;T. Tsuru;A. Takeda;Y. Arai;T. Imamura;T. Ohmoto;A. Iwata
我们一直在开发基于绝缘体上硅技术的有源像素传感器，用于未来的 X 射线天文学任务。最近我们制造了名为“XRPIX2”的新原型，并研究了其光谱性能。为了对不同芯片设计进行比较和评估，XRPIX2由3种像素类型组成：小像素、大像素1和大像素2。在小像素中，我们发现68%像素的增益在平均值的1.4%以内，并且8keV X射线的能量分辨率为656eV（FWHM），这是我们开发中最好的光谱性能。大像素1和大像素2的像素间距是小像素的两倍。 Large Pixel 1 成功减少了电荷共享事件。此外，Large Pixel 2 在像素中具有多个用于电荷收集的节点。我们证实多节点结构可以有效提高电荷收集效率。
We have been developing active pixel sensors based on silicon-on-insulator technology for future X-ray astronomy missions. Recently we fabricated the new prototype named “XRPIX2”, and investigated its spectroscopic performance. For comparison and evaluation of different chip designs, XRPIX2 consists of 3 pixel types: Small Pixel, Large Pixel 1, and Large Pixel 2. In Small Pixel, we found that the gains of the 68% pixels are within 1.4% of the mean value, and the energy resolution is 656 eV (FWHM) for 8 keV X-rays, which is the best spectroscopic performance in our development. The pixel pitch of Large Pixel 1 and Large Pixel 2 is twice as large as that of Small Pixel. Charge sharing events are successfully reduced for Large Pixel 1. Moreover Large Pixel 2 has multiple nodes for charge collection in a pixel. We confirmed that the multi-nodes structure is effective to increase charge collection efficiency.