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arXiv 1402.6871physics.ins-dethep-ex
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LAB基和均三甲苯基液体增透器光产额的温度依赖性

Temperature dependence of the light yield of the LAB-based and mesitylene-based liquid scintillators

Xia DongMei, Yu BoXiang, Li XiaoBo, Sun XiLei, Ding YaYun, Zhou Li, Cao Jun, Hu Wei, Ye XingCheng, Chen HaiTao, Ding XueFeng, Du Bing

摘要:

研究了线性烷基苯(LAB)基和均三甲苯基液体净化器的光产额与温度的关系。当温度从$26\;^{\circ}$ C降低到$-40\;^{\circ }$ C时,两种液体增感器的光产额增加23%,校正了光电倍增管的温度响应。测量有助于理解液体闪烁体探测器的能量响应。特别是下一代反应堆中微子实验,如江门地下中微子观测站(JUNO),需要非常高的能量分辨率。由于未观察到液体闪烁体透明度的明显劣化,因此将检测器的操作温度降低至$\sim4\;^\circ$ C将使检测器的光电子产额增加13%,结合了液体闪烁体的光产额增加和光电倍增管的量子效率增加。

英文摘要:

We studied the temperature dependence of the light yield of the linear alkyl benzene (LAB)-based and mesitylene-based liquid scintillators. The light yield increases by 23% for both liquid scintillators when the temperature is lowered from $26\;^{\circ}$C to $-40\;^{\circ }$C, correcting for the temperature response of the photomultiplier tube. The measurements help to understand the energy response of the liquid scintillator detectors. Especially, the next generation reactor neutrino experiments for neutrino mass hierarchy, such as the Jiangmen Underground Neutrino Observatory (JUNO), require very high energy resolution. As no apparent degradation on the liquid scintillator transparency was observed, lowering the operation temperature of the detector to $\sim4\;^\circ$C will increase the photoelectron yield of the detector by 13%, combining the light yield increase of the liquid scintillator and the quantum efficiency increase of the photomultiplier tubes.

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