Initial performance of the high sensitivity alpha particle detector at the Yangyang underground laboratory

Ha, C.; Adhikari, G.; Adhikari, P.; Jeon, E. J.; Kang, W. G.; Kim, B.H.; Kim, Heonoh; Kim, Y.D.; Kim, Yoon Hak; Lee, H.S.; Lee, J.H.; Lee, M.H.; Leonard, D. S.; Olsen, S. L.; Park, J.S.; Yong, S.H.; Yoon, Y. S.

doi:10.1016/j.nima.2018.09.129

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…Many alpha detectors have negligible backgrounds reduced by operation underground, but backgrounds of the most sensitive detector for α screening, the XIA UltraLo-1800 [121], with a sensitivity to surface 210 Po < 0.1 mBq m −2 [89] are reduced by operation underground by about a factor of 3 [93]. Despite this fact, relatively few underground sites (Boulby, Kamioka, PNNL, and Y2L [122]) have underground XIA detectors; one will be moved underground at SNOLAB soon. Most experiments require surface-alpha sensitivity that may be achieved with the XIA, but improved sensitivity is needed by Argo and is important for many experiments wishing to ensure that assembly occurs within the background requirements, rather than resulting in a need to etch or replace materials after assembly.…”

Section: Alpha Screeningmentioning

confidence: 99%

Supporting Capabilities For Underground Facilities

Kamaha¹,

Mount²,

Schnee³

2022

Preprint

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The 2021 particle physics community study, known as "Snowmass 2021", has brought together particle physicists around the world to create a unified vision for the field over the next decade. One of the areas of focus is the Underground Facilities (UF) frontier, which addresses underground infrastructure and the scientific programs and goals of underground-based experiments. To this effect, the UF Supporting Capabilities topical group created two surveys for the community to identify potential gaps between the supporting capabilities of facilities and those needed by current and future experiments. Capabilities surveyed are discussed in this report and include underground cleanroom space size and specifications, radon-reduced space needs and availability, the assay need and other underground space needs as well timeline for future experiments. Results indicate that future, larger experiments will increasingly require underground assembly in larger, cleaner cleanrooms, often with better radon-reduction systems and increased monitoring capability for ambient contaminants. Most assay needs may be met by existing worldwide capabilities with organized cooperation between facilities and experiments. Improved assay sensitivity is needed for assays of bulk and surface radioactivity for some materials for some experiments, and would be highly beneficial for radon emanation.

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Section: Alpha Screeningmentioning

confidence: 99%

Supporting Capabilities For Underground Facilities

Kamaha¹,

Mount²,

Schnee³

2022

Preprint

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Supporting capabilities for underground facilities

Kamaha,

Mount,

Schnee

2023

AIP Conference Proceedings

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Radioassay and Purification for Experiments at Y2L and Yemilab in Korea

Lee

2020

J. Phys.: Conf. Ser.

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Two major rare-process search experiments, COSINE-100 for WIMP dark matter and AMoRE for neutrinoless double beta decay, have been running at the Yangyang underground laboratory (Y2L) in Korea for about four years. In order to measure radio-activities of materials in both experiments, a number of ultra-low radioactivity measurement detectors have been developed and are now operational. For radioassays of raw materials and detector components, an ICP-MS, an argon gas ionization counter, and a number of HPGe detectors are being used. Three silicon PIN diode-based radon chamber detectors have been either upgraded or constructed for accurate measurements of atmospheric radon in a radon reduction system. A fourteen element HPGe detectors array was installed in 2016 for more sensitive measurements and larger sample capacities than those could be tested in two single crystal HPGe detectors. Since the Y2L space is too small to accommodate the next phases of both experiments, a new underground laboratory, called Y emilab, is being constructed in Jeongseon, Korea with a factor of ten more space (~2,800 m2) and a ~1,100 m overburden compared to ~200 m2 and ~700 m at Y2L. The future experiments require detector materials with substantially lower background levels than those in the current ones. Various types of scintillating crystals such as CaMoO4, Li2MoO4, and NaI(Tl) are being grown with purification methods specifically developed for the raw materials. A summary on radioassay and purification results for experiments at Y2L and Yemilab in Korea will be presented.

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Initial performance of the high sensitivity alpha particle detector at the Yangyang underground laboratory

Cited by 4 publications

References 25 publications

Supporting Capabilities For Underground Facilities

Supporting Capabilities For Underground Facilities

Supporting capabilities for underground facilities

Radioassay and Purification for Experiments at Y2L and Yemilab in Korea

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