下一代Ta-STJ传感器阵列用于BSM物理搜索
Next Generation Ta-STJ Sensor Arrays for BSM Physics Searches
AI总结：
下一代Ta-STJ传感器阵列通过消除串扰和使用更稳定的激光校准，提升了BSM物理搜索的精度和可靠性。
摘要：
贝利业电子捕获在超导隧道结（STJ）实验中使用超导隧道结传感器来搜索超出标准模型（BSM）的物理现象，通过$\mathbf{^7}$Be电子捕获衰变至$\mathbf{^7}$Li的反冲光谱学进行研究。实验中使用脉冲紫外激光校准STJ，精度约为20 meV。第三阶段实验揭示了STJ之间存在系统校准偏差。我们发现这些误差是由电阻性串扰和校准激光强度变化引起的。对于第四阶段实验，我们通过设计STJ阵列，使每个像素都有独立的接地线来消除串扰。我们还使用更稳定的紫外激光进行校准。新的STJ阵列由STAR Cryoelectronics制造并在LLNL和FRIB测试。它们在感兴趣的能量范围内（低于100 eV）具有与之前相同的高能量分辨率，约为1-2 eV，并且不再表现出之前的校准误差。我们讨论了设计改进和STJ阵列性能，以供下一步BeEST实验使用。
英文摘要：
The Beryllium Electron capture in Superconducting Tunnel junctions (BeEST) experiment uses superconducting tunnel junction (STJ) sensors to search for physics beyond the standard model (BSM) with recoil spectroscopy of the $\mathbf{^7}$Be EC decay into $\mathbf{^7}$Li. A pulsed UV laser is used to calibrate the STJs throughout the experiment with $\sim$20 meV precision. Phase-III of the BeEST experiment revealed a systematic calibration discrepancy between STJs. We found these artifacts to be caused by resistive crosstalk and by intensity variations of the calibration laser. For phase-IV of the BeEST experiment, we have removed the crosstalk by designing the STJ array so that each pixel has its own ground wire. We now also use a more stable UV laser for calibration. The new STJ arrays were fabricated at STAR Cryoelectronics and tested at LLNL and FRIB. They have the same high energy resolution of $\sim$1-2~eV in the energy range of interest below 100~eV as before, and they no longer exhibit the earlier calibration artifacts. We discuss the design changes and the STJ array performance for the next phase of the BeEST experiment.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
