论文标题
在两相氩探测器的电致发光信号中观察到异常慢分量
Observation of unusual slow components in electroluminescence signal of two-phase argon detector
论文作者
论文摘要
在两相检测器中使用比例电发光（EL）进行暗物质搜索，以记录液相（S2信号）颗粒散射引起的气相中的电离信号。在这项工作中，首次系统地研究了两相氩探测器中的EL脉冲形状，该脉冲形状在各种降低的电场范围内进行了系统的研究，从3到9 TD不等。在不同的读出构型和光谱范围内研究了脉冲形状：使用有或没有波长变速杆（WLS）的低温PMT和SIPM，在VUV和可见范围内。我们观察到快速组件和两个异常的慢组件，时间常数约为5 $μ$ S和40美元$ $ $。慢组成部分的异常特性是它们的贡献和时间常数随电场而增加。
Proportional electroluminescence (EL) in noble gases is used in two-phase detectors for dark matter search to record ionization signals in the gas phase induced by particle scattering in the liquid phase (S2 signals). In this work, the EL pulse-shapes in a two-phase argon detector have for the first time been studied systematically in a wide range of reduced electric field, varying from 3 to 9 Td. The pulse-shapes were studied at different readout configurations and spectral ranges: using cryogenic PMTs and SiPMs, with and without a wavelength shifter (WLS), in the VUV and visible range. We observed the fast component and two unusual slow components, with time constants of about 5 $μ$s and 40 $μ$s. The unusual characteristic property of slow components was that their contribution and time constants increased with electric field.
