A new method for evaluating the effectiveness of plastic packaging against radon penetration

Meng, Y.; Busenitz, Jerry; Piepke, A.

doi:10.1016/j.apradiso.2019.108963

Cited by 7 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both aluminized mylar and nylon bags have been shown to be very efficient against Rn penetration, with reduction factors of 2500 ± 1042 and 130 ± 3 respectively [39]. Once properly bagged, the detector components were shipped to the SAL facility where they were assembled in the RCR to mitigate, as previously mentioned, against surface contamination during assembly.…”

Section: Cleanliness Protocols To Mitigate Against Dust Andmentioning

confidence: 99%

The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

et al. 2020

View full text Add to dashboard Cite

LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above $${1.4 \times 10^{-48}}\, {\hbox {cm}}^{2}$$ 1.4 × 10 - 48 cm 2 for a WIMP mass of $${40}\, \hbox {GeV}/{\hbox {c}}^{2}$$ 40 GeV / c 2 and a $${1000}\, \hbox {days}$$ 1000 days exposure. LZ achieves this sensitivity through a combination of a large $${5.6}\, \hbox {t}$$ 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.

show abstract

Section: Cleanliness Protocols To Mitigate Against Dust Andmentioning

confidence: 99%

The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The values obtained in different experimental halls inside LSC performed at the same time are compatibles [4]. The radon emanation depends on several external factors including rain or snow melting because water increases radon diffusion from the material surfaces and its later emanation [2,[5][6][7][8]. A dedicated campaign of measurements was performed in the underground lab to identify the spatial distribution of the radon sources [9].…”

Section: Laboratorio Subterráneo De Canfrancmentioning

confidence: 81%

Radon Mitigation Applications at the Laboratorio Subterráneo de Canfranc (LSC)

et al. 2022

View full text Add to dashboard Cite

The Laboratorio Subterráneo de Canfranc (LSC) is the Spanish national hub for low radioactivity techniques and the associated scientific and technological applications. The concentration of the airborne radon is a major component of the radioactive budget in the neighborhood of the detectors. The LSC hosts a Radon Abatement System, which delivers a radon suppressed air with 1.1±0.2 mBq/m3 of 222Rn. The radon content in the air is continuously monitored with an Electrostatic Radon Monitor. Measurements with the double beta decay demonstrators NEXT-NEW and CROSS and the gamma HPGe detectors show the important reduction of the radioactive background due to the purified air in the vicinity of the detectors. We also discuss the use of this facility in the LSC current program which includes NEXT-100, low background biology experiments and radiopure copper electroformation equipment placed in the radon-free clean room.

show abstract

“…The sample was then tightly wrapped and sealed into a Mylar bag of 0.05 mm thickness. The Mylar bags are excellent radon barriers [18], prohibiting radon atoms to escape to any significant degree. Without further delay, the sealed sample was placed in one of two shielded low-background HPGe detector setups utilized in this study.…”

Section: Methodsmentioning

confidence: 99%

Radon Emanation from Dust of Varying Composition and Size

Meng¹,

Busenitz²,

Piepke³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

222 Rn emanating from environmental dust constitutes an important background component for many low-energy, low-rate experiments. Radon emanation rates from dust and rock, thus, are important for experiment planning. In this paper, we report measured radon emanation fractions (defined here as the ratio of the transient to the total radon progeny activity of a sample) for five types of dust differing in grain size and composition. This data was obtained using highpurity germanium detectors (HPGe), measuring emanated and non-emanated 222 Rn progeny activities and their temporal change. The range of observed radon emanation fractions ranges from 3.5 ± 1.9% and 16.1 ± 0.84%. The impact of the water, contained in the dust, might have on the emanation fraction was evaluated and found to be small. The data presented here do not show a clear correlation between dust particle size and emanation fraction, as hypothesized when starting this study. Our measurement results are compared to expectations of radon emanation models.

show abstract

A new method for evaluating the effectiveness of plastic packaging against radon penetration

Cited by 7 publications

References 11 publications

The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

Radon Mitigation Applications at the Laboratorio Subterráneo de Canfranc (LSC)

Radon Emanation from Dust of Varying Composition and Size

Contact Info

Product

Resources

About