Measurement of Flow Impedance in Radon Trap for LZ*

The LUX-ZEPLIN (LZ) Experiment is a dark matter direct detection experiment searching for weakly interacting massive particles (WIMPs) using liquid xenon as the detection medium. As for any rare event search experiment, LZ requires very low backgrounds. Radon is a dominant radioactive background, which is emanating from the detector components and needs to be continuously filtered to maintain high detector sensitivity. The University of Michigan group has developed a radon reduction system in an effort to filter radon backgrounds from the LZ detector. Characteristics of the radon reduction system, including flow impedance measurements as a function of charcoal trap temperature, will be presented.