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<b><span style="font-size:48.0pt">Physics Seminar</span></b></p>
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<span><b><span style="font-size:22.0pt">Aiwu Zhang</span></b></span></p>
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<span><b><span style="font-size:22.0pt">Brookhaven National Lab</span></b></span></p>
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<b><i> </i></b></p>
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<i><span style="font-size:22.0pt">Impurity Control and Light Detection in Liquid Argon Detectors</span></i></p>
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<b><span style="font-size:18.0pt">Abstract:</span></b></p>
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</span></span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-font-family:
"Times New Roman""><span style="mso-spacerun:yes"> </span>For neutrino oscillation experiments such as DUNE that utilize very large volume of liquid argon
(LAr) as the detection medium, it is critical to remove and control impurities (such as oxygen, water, etc.) to extremely low levels (<1 ppb) in order to achieve unprecedent energy scale precision. It is thus desired to have a verified mathematical model describing
the dynamics of impurity distributions in any LAr detectors. In this presentation, I will mainly talk about such a model that considers the full dynamic components influencing the purity performance in a LAr detector, including sources, sinks, and transport
of impurities within and between the gas and liquid argon phases.</span></p>
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</span>In addition, scintillation light detection in LAr detectors is vital for triggering with precision timing information at accelerator-based neutrino experiments. As a second part of this presentation, I will briefly talk about the light detection system
in the ICARUS experiment and its current status</span><span style="font-family:"Times New Roman",serif;
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<b><span style="font-size:18.0pt">Monday, January 13, 2020</span></b></p>
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<b><span style="font-size:18.0pt">9:30am</span></b></p>
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<b><span style="font-size:18.0pt">CEBAF Center F113</span></b></p>
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