arxiv: 2006.02506 · v3 · ★pith:PMSFTGN3new · submitted 2020-06-03 · ⚛️ physics.ins-det · hep-ex
The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs
show 382 more authors
read the original abstract
LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above $1.4 \times 10^{-48}$ cm$^{2}$ for a WIMP mass of 40 GeV/c$^{2}$ and a 1000 d exposure. LZ achieves this sensitivity through a combination of a large 5.6 t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the experimental background model against which any possible signal excess may be evaluated. The campaign and its results are described in this paper. We present assays of dust and radon daughters depositing on the surface of components as well as cleanliness controls necessary to maintain background expectations through detector construction and assembly. Finally, examples from the campaign to highlight fixed contaminant radioassays for the LZ photomultiplier tubes, quality control and quality assurance procedures through fabrication, radon emanation measurements of major sub-systems, and bespoke detector systems to assay scintillator are presented.
This paper has not been read by Pith yet.
Forward citations
Cited by 2 Pith papers
Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.
-
Application of surface coating for radon mitigation in rare-event searches
physics.ins-det 2026-06 unverdicted novelty 5.0
Electroplating copper onto 226Ra-implanted stainless steel reduces 222Rn emanation rate by 1000x.
-
Photoluminescence of resin-based solder flux residue under ultraviolet excitation from 120 nm to 310 nm
physics.ins-det 2026-05 unverdicted novelty 5.0
All tested resin-based solder flux residues photoluminesce in the visible spectral region when exposed to VUV light.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.