PandaX: A Liquid Xenon Dark Matter Experiment at CJPL

Cao, X. G.; Chen, Xuanhua; Chen, Y. H.; Cui, X. Y.; Fang, D. Q.; Fu, Changbo; Giboni, K. L.; Gong, Hao; Guo, G.; He, Ming; Hu, Juan; Huang, X. T.; Ji, Xiang; Ju, Yong Lin; Li, S. L.; Lin, Qing; Liu, H. X.; Liu, J. L.; Liu, X.; Lorenzon, W.; G., Y.; Mao, Y.; Ni, K.; Pushkin, K.; Ren, Xiang Xiang; Schubnell, M.; Shen, Manbin; Shi, Yujun; Stephenson, S.; Tan, Andi; Tarlè, G.; Wang, H. W.; Wang, J. M.; Wang, M.; Wang, X. M.; Wang, Z.; Wei, Yiyong; Wu, S.; Xiao, M.; Xiao, X.; Xie, Peng; Ye, T.; You, Y. H.; Zeng, X. H.; Zhang, H.; Zhang, T.; Zhao, Hong; Zhao, Li; Zhou, X. P.; Zhu, Zhonghua

doi:10.48550/arxiv.1405.2882

Cited by 15 publications

(18 citation statements)

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“…In Table 6, we show the screening results normalized by active PMT photocathode area, and compare these with previous versions and other PMT types used in liquid xenon experiments. We remark that the R11410-10 activities obtained by the LUX collaboration [21] are slightly lower than those measured by the PandaX [12] and the XENON collaborations for the same version of the tube. The R8520 sensor is a 1-inch square tube employed in the XENON100 experiment [3] and the R8778 is a 2-inch cylindrical tube operated in the LUX detector [6].…”

Section: Partcontrasting

confidence: 51%

“…Photomultiplier tubes (PMTs) were shown to cause a major contribution to the electronic recoil background from detector materials in the XENON100 [8] and LUX [10] experiments. Other current and planned experiments based on xenon as a detection medium for rare-event searches are XMASS [11], Pan-daX [12], LZ [13], DARWIN [14], NEXT [16] and EXO [15].…”

Section: Introductionmentioning

confidence: 99%

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Lowering the radioactivity of the photomultiplier tubes for the XENON1T dark matter experiment

Aprile,

Agostini,

Alfonsi

et al. 2015

Preprint

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The low-background, VUV-sensitive 3-inch diameter photomultiplier tube R11410 has been developed by Hamamatsu for dark matter direct detection experiments using liquid xenon as the target material. We present the results from the joint effort between the XENON collaboration and the Hamamatsu company to produce a highly radio-pure photosensor (version R11410-21) for the XENON1T dark matter experiment. After introducing the photosensor and its components, we show the methods and results of the radioactive contamination measurements of the individual materials employed in the photomultiplier production. We then discuss the adopted strategies to reduce the radioactivity of the various PMT versions. Finally, we detail the results from screening 216 tubes with ultra-low background germanium detectors, as well as their implications for the expected electronic and nuclear recoil background of the XENON1T experiment.

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Section: Partcontrasting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Lowering the radioactivity of the photomultiplier tubes for the XENON1T dark matter experiment

Aprile,

Agostini,

Alfonsi

et al. 2015

Preprint

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“…The available PMTs of the selected model for NEXT-100 are being screened in 3-unit groups using the same Ge detector; since all of them show equivalent activity, a joint analysis of fifteen available runs (corresponding to 45 PMTs) has been carried out to derive activities per PMT (row #16 of table 1). The results are compatible with those presented by XENON [11] and PandaX collaborations [12]; the same PMT model has been also analyzed in [13,14]. The modified version R11410-21 of the Hamamatsu PMTs presents a 60 Co activity reduced by a factor ∼4-5, according to XENON1T results [15].…”

Section: Materials Radioassaysupporting

confidence: 87%

Radon and material radiopurity assessment for the NEXT double beta decay experiment

Cebrián,

Pérez,

Bandac

et al. 2015

Preprint

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The "Neutrino Experiment with a Xenon TPC" (NEXT), intended to investigate the neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136 Xe at the Canfranc Underground Laboratory in Spain, requires ultra-low background conditions demanding an exhaustive control of material radiopurity and environmental radon levels. An extensive material screening process is underway for several years based mainly on gamma-ray spectroscopy using ultra-low background germanium detectors in Canfranc but also on mass spectrometry techniques like GDMS and ICPMS. Components from shielding, pressure vessel, electroluminescence and high voltage elements and energy and tracking readout planes have been analyzed, helping in the final design of the experiment and in the construction of the background model. The latest measurements carried out will be presented and the implication on NEXT of their results will be discussed. The commissioning of the NEW detector, as a first step towards NEXT, has started in Canfranc; in-situ measurements of airborne radon levels were taken there to optimize the system for radon mitigation and will be shown too.

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“…Slow Control A slow control system, developed for use in PandaX [17], was implemented to provide monitoring and control of important system variables. Parameters such as pressures, temperatures, setpoints, LXe liquid level, GXe circulation rate, and valve states are logged asynchronously during twenty second time intervals while the system is running.…”

Section: Feed-throughsmentioning

confidence: 99%

MiX: a position sensitive dual-phase liquid xenon detector

et al. 2015

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ABSTRACT:The need for precise characterization of dual-phase xenon detectors has grown as the technology has matured into a state of high efficacy for rare event searches. The Michigan Xenon detector was constructed to study the microphysics of particle interactions in liquid xenon across a large energy range in an effort to probe aspects of radiation detection in liquid xenon. We report the design and performance of a small 3D position sensitive dual-phase liquid xenon time projection chamber with high light yield (L 122 y = 15.2 pe/keV at zero field), long electron lifetime (τ > 200 µs), and excellent energy resolution (σ /E = 1% for 1,333 keV gamma rays in a drift field of 200 V/cm). Liquid xenon time projection chambers with such high energy resolution may find applications not only in dark matter direct detection searches, but also in neutrinoless double beta decay experiments and other applications.

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PandaX: A Liquid Xenon Dark Matter Experiment at CJPL

Cited by 15 publications

References 0 publications

Lowering the radioactivity of the photomultiplier tubes for the XENON1T dark matter experiment

Lowering the radioactivity of the photomultiplier tubes for the XENON1T dark matter experiment

Radon and material radiopurity assessment for the NEXT double beta decay experiment

MiX: a position sensitive dual-phase liquid xenon detector

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