On proportional scintillation in very large liquid xenon detectors

• 作者: Jiang-Lai Liu Karl-Ludwig Giboni Pratibha Juyal Xiang-Dong Ji
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2020,（9）
• 所属期刊栏目: NUCLEAR ELECTRONICS AND INSTRUMENTATION
• 页码范围: 90-97
• 页数: 8页
• 语种: 英文

摘要

The charge readout of a liquid xenon (LXe) detector via proportional scintillation in the liquid phase was first realized by the Waseda group 40 years ago, but the technical challenges involved were overwhelming. Although the tests were successful, this method was finally discarded and eventually nearly forgotten. Currently, this approach is not considered for large LXe dark matter detectors. Instead, the dual-phase technology was selected despite many limitations and challenges. In two indepen-dent studies, two groups from Columbia University and Shanghai Jiao Tong University reevaluated proportional scintillation in the liquid phase. Both studies established the merits for very large LXe detectors, but the Columbia group also encountered apparent limitations, namely the shadowing of the light by the anode wires, and a depen-dence of the pulse shape on the drift path of the electrons in the anode region. The differences between the two studies, however, are not intrinsic to the technique, but a direct consequence of the chosen geometry. Taking the geomet-rical differences into account, the results match without ambiguity. They also agree with the original results from the Waseda group.