论文标题
用于-50度的中微子检测器的液体闪光灯
A liquid scintillator for a neutrino Detector working at -50 degree
论文作者
论文摘要
为Taishan抗神经天文台（TAO）开发了液体闪光灯（LS），即吨位中微子检测器，通过采用硅光电塑料（SIPMS）作为PhotoMentor，用次级能量分辨率测量了反应堆抗神经光谱。为了将SIPM的黑噪声降低到可接受的水平，LS必须以-50度或更低的速度工作。开发了基于电荷耦合器件（CCD）的定制设备，以研究低温恒温器中液体样品的透明度。我们发现LS中的水含量会在低温下导致透明度降解，可以通过冒泡干燥的氮来清除水。添加0.05％的乙醇作为共溶性治愈溶解度可减少在低温下荧光PPO和BIS-MSB的问题。最后，在溶剂实验室中，摄入量为0.1％GD的GadoliniumDoped液体闪光灯（GDL），重量为0.1％GD，2 g/L PPO，1 mg/L BIS -MSB和0.05％的乙醇，在-50度时显示出良好的透明度，也显示出良好的透明度。
A liquid scintillator (LS) is developed for the Taishan Antineutrino Observatory (TAO), a ton-level neutrino detector to measure the reactor antineutrino spectrum with sub-percent energy resolution by adopting Silicon Photomultipliers (SiPMs) as photosensor. To reduce the dark noise of SiPMs to an acceptable level, the LS has to work at -50 degree or lower. A customized apparatus based on a charge-coupled device (CCD) is developed to study the transparency of the liquid samples in a cryostat. We find that the water content in LS results in transparency degradation at low temperature, which can be cured by bubbling dry nitrogen to remove water. Adding 0.05% ethanol as co-solvent cures the solubility decrease problem of the fluors PPO and bis-MSB at low temperature. Finally, a Gadoliniumdoped liquid scintillator (GdLS), with 0.1% Gd by weight, 2 g/L PPO, 1 mg/L bis-MSB, and 0.05% ethanol by weight in the solvent LAB, shows good transparency at -50 degree and also good light yield.
