AI 中文总结
本研究利用波长敏感粒子探测器，在气态TPC中观测氩气EL光的光谱与时间特性，明确其不同波段发射的差异，为下一代稀有事例探测器的设计优化提供关键依据。
AI 中文摘要
我们在气态时间投影室（TPC）中开展氩气电致发光（EL）光的光谱学研究。利用配备有不同光谱灵敏度光电倍增管的紧凑型探测器，我们在不同气体压力下测量了两个标称波长区域的光发射，分别为约[110, 160] nm和[160, 650] nm。除了已知的128 nm第二连续谱发射外，我们在[160, 650] nm波段观测到显著的发射，其具有纳秒级的快速响应，表明光子产生与漂移电子穿过高场EL区域的过程密切相关。相比之下，[110, 160] nm发射呈现明显更慢的时间演化，主要受激元形成与退激发动力学支配，其光输出主要由氩气第二连续谱的长寿命三重态成分决定。我们证明，通过将快速UV3响应与激元形成及衰变函数进行卷积，可以重现完整的真空紫外（VUV）脉冲形状，为观测到的信号提供一致的唯象学解释。我们的结果为氩气电致发光的光谱和时间特性提供了新的见解，并对基于气态TPC的下一代稀有事例探测器的设计与优化具有直接意义。目前正在开展进一步研究，以更精确地表征该发射并探究其在粒子鉴别方面的潜力。
英文摘要
We present a spectroscopic study of argon electroluminescence (EL) light in a gaseous time projection chamber (TPC). Using a compact detector equipped with photomultiplier tubes with different spectral sensitivities, we measure the light emission in two nominal wavelength regions, approximately [110, 160] nm and [160, 650] nm, at different gas pressures. In addition to the well-known 128 nm emission of the second continuum, significant emission is observed in the [160, 650] nm band, with a prompt, nanosecond-scale response indicating that photon production closely follows the transit of drifting electrons across the high-field EL region. In contrast, the [110, 160] nm emission displays a markedly slower time evolution, dominated by excimer formation and de-excitation dynamics, with the light output governed primarily by the long-lived triplet component of the argon second continuum emission. We demonstrate that the full VUV pulse shape can be reproduced by convolving the fast UV3 response with excimer formation and decay functions, providing a coherent phenomenological interpretation of the observed signals. Our results provide new insights into the spectral and temporal properties of argon electroluminescence and have direct implications for the design and optimization of next-generation rare-event detectors based on gaseous TPCs. Further studies are underway to characterize this emission more precisely and to investigate its potential for particle discrimination.
