The PIPS-SrI₂(Eu) is a prototype atmospheric radioxenon detection system designed at Oregon State University in support of international efforts towards monitoring clandestine nuclear weapon testing activities. This detector aims to address some shortcomings found in currently deployed beta-gamma atmospheric radioxenon detection systems, such as lackluster energy resolution and memory effect, by employing modern detection materials and readout. The system uses a PIPSBox, a silicon-based gas cell, for electron detection, and a pair of ultrabright, D-shaped SrI₂(Eu) scintillators coupled to silicon photomultipliers for photon detection. A custom eight-channel digital pulse processor equipped with a field programmable gate-array (FPGA) identifies electron-photon coincidences between the volumes in near real-time. Gas samples of the four radioxenon isotopes of interest were independently measured with the PIPS-SrI₂(Eu) detection system to determine energy resolution and efficiency. Application of FPGA-based coincidence discrimination in near real-time reduced the ambient background count rate by 95.85 ± 0.04%. Using parameters from the Xenon International gas processing unit and assuming a blank sample and zero memory effect the minimum detectable concentrations (MDCs) for the isotopes were calculated to be 0.12 ± 0.03, 0.27 ± 0.05, 0.15 ± 0.02, and 1.00 ± 0.08 mBq/m³ air for ${}^{\mathrm{131m}}$Xe, ¹³³Xe, ${}^{\mathrm{133m}}$Xe, and ¹³⁵Xe, respectively. These MDC estimates compare well with other radioxenon detection systems employed in the International Monitoring System (IMS) and indicate that the PIPS-SrI ₂(Eu) is in compliance with the Comprehensive Nuclear Test-Ban-Treaty Organization (CTBTO) sensitivity requirement of $\le$ 1 mBq/m³ for ¹³³Xe.

PIPS-SrI ₂ (Eu) 是俄勒冈州立大学设计的原型大气放射性氙检测系统，旨在支持监测秘密核武器试验活动的国际努力。该探测器旨在通过采用现代探测材料和读数来解决当前部署的 β-γ 大气放射性氙探测系统中发现的一些缺点，例如低能量分辨率和记忆效应。该系统使用 PIPSBox（一种硅基气室）进行电子检测，以及一对超亮 D 形 SrI ₂(Eu) 闪烁体与硅光电倍增管耦合以进行光子检测。配备现场可编程门阵列 (FPGA) 的定制八通道数字脉冲处理器近乎实时地识别体积之间的电子光子重合。使用 PIPS-SrI ₂ (Eu) 检测系统独立测量四种感兴趣的放射性氙同位素的气体样品，以确定能量分辨率和效率。近实时应用基于 FPGA 的符合判别将环境背景计数率降低了 95.85 ± 0.04%。使用 Xenon International 气体处理装置的参数并假设空白样品和零记忆效应，同位素的最小可检测浓度 (MDC) 计算为 0.12 ± 0.03、0.27 ± 0.05、0.15 ± 0.02 和 1.00 ± 0.08 mBq/米³空气为${}^{\mathrm{131m}}$氙，¹³³氙，${}^{\mathrm{133m}}$分别为Xe 和¹³⁵ Xe。这些 MDC 估计值与国际监测系统 (IMS) 中采用的其他放射性氙检测系统相比很好，并表明 PIPS-SrI ₂ (Eu) 符合全面禁止核试验条约组织 (CTBTO) 的敏感性要求$\le$¹³³ Xe为1 mBq/m ³。