Low Background Assay Results for LZ
ORAL
Abstract
The next generation dark matter experiment LUX-ZEPLIN (LZ) requires careful control of intrinsic radioactivity in all critical detector components in order to reach its unprecedented target sensitivity to Weakly Interacting Massive Particles (WIMPs): $2 \times 10^{-48}$ $cm^2$ at $50$ $ \frac{GeV}{c^2}$. Appropriate material selection is essential to meeting this goal, and an extensive campaign of low background screening is currently being carried out using assay devices at the Sanford Underground Research Facility and the Boulby Underground Laboratory. We will present results from this work, including measurements for the Ti cryostat, PMT bases, PMT raw materials, PTFE, and other components.
*This work was partially supported by the U.S. Department of Energy (DOE) under award number DE-AC02-05CH11231, and is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. 1106400.
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