Performance of a large area photon detector for rare event search applications
Performance of a large area photon detector for rare event search applications
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DOI：
10.1063/5.0032372
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发表时间：
2020-09
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通讯作者：
C. W. Fink;S. Watkins;T. Aramaki;P. Brink;J. Camilleri;X. Defay;S. Ganjam;Y. Kolomensky;R. Mahapatra;N. Mirabolfathi;W. Page;R. Partridge;M. Platt;M. Pyle;B. Sadoulet;B. Serfass;S. Zuber
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作者：
C. W. Fink;S. Watkins;T. Aramaki;P. Brink;J. Camilleri;X. Defay;S. Ganjam;Y. Kolomensky;R. Mahapatra;N. Mirabolfathi;W. Page;R. Partridge;M. Platt;M. Pyle;B. Sadoulet;B. Serfass;S. Zuber
我们设计了一种大面积低温光电探测器（CPD），用于在罕见事件搜索中识别活跃粒子，如中微子双β衰变和暗物质实验。探测器由一块1毫米厚的$10.6$$\mathrm{g}$硅片组成，其表面积为$45.6$$\mathrm{cm}^2$。它配备了一个分布式网络的准粒子阱辅助电热反馈过渡边缘传感器（qet）与$T_c=41.5$$\mathrm{mK}$，以测量与光子相互作用释放的非热声子。探测器的特征和校准在探测器的中心与一个准直$^{55}$铁x射线源。噪声等效功率为$1\times 10^{-17}$$\mathrm{W}/\sqrt{\mathrm{Hz}}$，带宽为$2.7$$\mathrm{kHz}$。测量的基线能量分辨率为$\sigma_E = 3.86 \pm 0.04$$(\mathrm{stat.})^{+0.23}_{-0.00}$$(\mathrm{syst.})$$\mathrm{eV}$ （RMS）。对于$5$$\sigma_E$事件，检测器还具有$\sigma_t = 2.3$$\mu\mathrm{s}$的预期时间分辨率。
We present the design and characterization of a large-area Cryogenic PhotoDetector (CPD) designed for active particle identification in rare event searches, such as neutrinoless double beta decay and dark matter experiments. The detector consists of a $45.6$ $\mathrm{cm}^2$ surface area by 1-mm-thick $10.6$ $\mathrm{g}$ Si wafer. It is instrumented with a distributed network of Quasiparticle-trap-assisted Electrothermal feedback Transition-edge sensors (QETs) with $T_c=41.5$ $\mathrm{mK}$ to measure athermal phonons released from interactions with photons. The detector is characterized and calibrated in the center of the detector with a collimated $^{55}$Fe X-ray source. The noise equivalent power is measured to be $1\times 10^{-17}$ $\mathrm{W}/\sqrt{\mathrm{Hz}}$ in a bandwidth of $2.7$ $\mathrm{kHz}$. The baseline energy resolution is measured to be $\sigma_E = 3.86 \pm 0.04$ $(\mathrm{stat.})^{+0.23}_{-0.00}$ $(\mathrm{syst.})$ $\mathrm{eV}$ (RMS). The detector also has an expected timing resolution of $\sigma_t = 2.3$ $\mu\mathrm{s}$ for $5$ $\sigma_E$ events.