论文标题
稀有事件搜索应用的大面积光子检测器的性能
Performance of a Large Area Photon Detector For Rare Event Search Applications
论文作者
论文摘要
我们介绍了在极少数事件搜索中为主动颗粒识别（例如中微子双β衰减和暗物质实验）设计的大面积低温光电探测器（CPD）的设计和表征。该检测器由$ 45.6 $ $ \ MATHRM {CM}^2 $表面积（1毫米厚$ 10.6 $ $ $ \ MATHRM {G} $ SI WAFER组成。它具有由超导型电热反馈传感器（QET）的分布式网络，具有超导临界温度$ t_c = 41.5 $ $ \ mathrm {mk} $，以测量从与光子相互作用中释放出的无元声子。检测器的特征和校准了检测器中心的准$^{55} $ fe X射线源。噪声等效功率的测量为$ 1 \ times 10^{ - 17} $ $ \ $ \ mathrm {w}/\ sqrt {\ mathrm {hz}} $，在带宽$ 2.7 $ $ $ $ \ mathrm {khz} $中。基线能量分辨率的测量为$σ_e= 3.86 \ pm 0.04 $ $（\ MATHRM {stat。}）^{+0.23} _ { - 0.00} $ $（\ MATHRM {syst。}）$检测器还具有预期的定时分辨率为$σ_T= 2.3 $ $ $ $ \ MATHRM {S} $，$ 5 $ $σ_e$ events。
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 superconducting critical temperature $T_c=41.5$ $\mathrm{mK}$ to measure athermal phonons released from interactions with photons. The detector is characterized and calibrated with a collimated $^{55}$Fe X-ray source incident on the center of the detector. 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 $σ_E = 3.86 \pm 0.04$ $(\mathrm{stat.})^{+0.23}_{-0.00}$ $(\mathrm{syst.})$ $\mathrm{eV}$ (RMS). The detector also has an expected timing resolution of $σ_t = 2.3$ $μ\mathrm{s}$ for $5$ $σ_E$ events.
