| Aging of LAB-based liquid scintillator in stainless steel containers |
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| 作者姓名： | 陈海涛 俞伯祥 单卿 丁雅韵 杜冰 刘书通 张烜 周莉 贾文宝 方建 叶星辰 胡维 牛顺利 颜嘉庆 赵航 洪道金 |
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| 作者单位： | 1 Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;;2 State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China;;3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| 摘 要： | Types 316 and 304 stainless steel are two candidates for the storage vessels and piping systems of LAB-based liquid scintillator (LS) in the JUNO experiment. LS aging experiments are carried out at temperatures of 40℃ and 25℃. After 192 days aging at 40℃, the attenuation length of LS was reduced by 6% in a glass container, 12% in a type 304 stainless steel tank, and 10% in a type 316 stainless steel tank. At 25℃ in 304 and 316 stainless steel tanks, the attenuation length was reduced by 6% after 307 days. The light yield and the absorption spectrum were practically the same as that of the unaged sample. The concentration of element Fe in the LAB-based LS did not show a clear change. Type 316 and 304 stainless steel can be used as vessels and transportation pipeline material for LAB-based LS.
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| 关 键 词： | JUNO liquid scintillator aging light yield absorption spectrum attenuation length |
| 收稿时间： | 2014-9-4 |
| 修稿时间： | 2014-11-11 |
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