R11410-22 Photomultiplier Tube Performance in the LUX-ZEPLIN (LZ) Experiment

The LUX-ZEPLIN (LZ) Experiment is a direct detection dark matter experiment that utilizes a dual-phase time-projection chamber (TPC) containing 7 tonnes of active xenon with a 5.6 tonne fiducial volume. To observe particle interactions in the TPC, LZ has implemented 494 Hamamatsu R11410 photomultiplier tubes (PMTs), which are sensitive to single photons and are capable of maintaining stable performance over the 1000 live-days of the experiment. These PMTs underwent a rigorous testing campaign prior to their installation inside the TPC. The behavior of these PMTs will be continuously monitored to verify their stability over the lifetime of LZ. In this talk, I will discuss the performance of the TPC PMTs used in the LZ Experiment.