Cold trap mass spectrometry techniques and application for the LUX-ZEPLIN experiment*

I explore the methods, usage, and contributions of cold trap mass spectrometry sampling systems to the LZ (LUX-ZEPLIN) liquid xenon dark matter experiment. Mass spectrometry sampling can reveal information about the purity of the xenon in the LZ experiment. Adding a cold trap to common mass spectrometry techniques can improve sensitivity, enabling us to see krypton at a level of tens of parts per quadrillion (ppq) i.e. one part in 10^14 (g/g). The technique has been used to determine a krypton concentration of 144 +/- 22 ppq in the LZ detector immediately after being filled in September of 2021. I will review this and other measurements made by cold trap mass spectrometry sampling systems for the LZ experiment in this talk.