LUX-ZEPLIN Outer Detector Performance

The LUX-ZEPLIN (LZ) experiment is a dark matter direct detection experiment searching for weakly interacting massive particles (WIMPs). The experiment consists of a dual-phase xenon time projection chamber (TPC) and two active veto systems, a xenon skin detector and an outer detector (OD), all housed within a water tank. The outer detector is a system of acrylic tanks, surrounding the TPC, filled with gadolinium-loaded liquid scintillator which is monitored by 120 photomultiplier tubes (PMTs). The primary aim of the OD is to enable LZ to distinguish neutron backgrounds from the nuclear recoil WIMP signals it searches for. This talk will detail the performance and stability of the OD from LZ's first WIMP search run through the current science run.