Development of Hard X-ray and Gamma-ray Detector With Transition Edge Sensor for Nuclear Materials Analysis
Development of Hard X-ray and Gamma-ray Detector With Transition Edge Sensor for Nuclear Materials Analysis
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DOI：
10.1109/tasc.2014.2374873
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发表时间：
2015-06
影响因子：
1.8
通讯作者：
S. Hatakeyama;T. Irimatsugawa;M. Ohno;H. Takahashi;R. Damayanthi;C. Otani;T. Maekawa
中科院分区：
文献类型：
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作者：
S. Hatakeyama;T. Irimatsugawa;M. Ohno;H. Takahashi;R. Damayanthi;C. Otani;T. Maekawa
我们研制了一台用于核材料分析的硬X射线和γ射线TES谱仪。通过使用金（Au）凸块柱将超导锡（Sn）吸收体耦合到TES膜以改善吸收体与TES之间的热接触。为了在100 keV附近的高能量光子处获得足够的检测效率，开发了TES微量热计的8像素阵列。在这种新器件中，用于连接吸收体和金凸点柱的环氧树脂胶被很好地控制，因此与我们的旧器件相比，衰减时间常数的慢分量从7.82 ms改善到4.46 ms。在59.5 keV的γ射线下，能量分辨率为131 eV的半高宽，这优于HPGe探测器的极限（60 keV下400 eV的半高宽）。
We have designed and fabricated a hard X-ray and gamma-ray TES spectrometer for nuclear materials analysis. A superconducting tin (Sn) absorber is coupled to the TES film by using a gold (Au) bump post to improve the thermal contact between the absorber and the TES. To obtain a sufficient detection efficiency at the high energy photons near 100 keV, an 8-pixel array of TES microcalorimeters were developed. In this new device, the epoxy glue which is used to connect the absorber and the gold bump post was well controlled and hence the slow component of the decay time constant was improved from 7.82 ms to 4.46 ms compared to our old device. The energy resolution was 131 eV FWHM at 59.5 keV gamma rays, which is better than the limit of HPGe detectors (400 eV FWHM at 60 keV).