scholarly journals Anisotropic diffusion of electrons in liquid xenon with application to improving the sensitivity of direct dark matter searches

2011 ◽  
Vol 635 (1) ◽  
pp. 41-43 ◽  
Author(s):  
Peter Sorensen
Keyword(s):  
Dark Matter ◽  
Anisotropic Diffusion ◽  
Liquid Xenon ◽  
Direct Dark Matter

scholarly journals Development of a dual-phase xenon TPC with a quartz chamber for direct dark matter searches

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Kazufumi Sato ◽  
Masaki Yamashita ◽  
Koichi Ichimura ◽  
Yoshitaka Itow ◽  
Shingo Kazama ◽  
...  
Keyword(s):  
Dark Matter ◽  
Electric Fields ◽  
Light Yield ◽  
Development Stage ◽  
Dual Phase ◽  
Sensitive Volume ◽  
Liquid Xenon ◽  
Calibration Source ◽  
External Interference ◽  
Direct Dark Matter

Abstract The idea of a hermetic quartz chamber in a dual-phase xenon time projection chamber (TPC) has the potential to improve the detector sensitivity for direct dark matter searches in the future. A major challenge facing TPC detectors in future dark matter experiments will be the reduction of the internal background such as $^{222}$Rn and the deterioration of the ionization signal due to electronegative impurities. The hermetic quartz chamber can isolate the TPC’s sensitive volume from external interference and is thus expected to prevent contamination caused by radioactive and electronegative impurities, which originate from the outer detector materials. At the Kamioka Observatory in Japan, we have developed a TPC with a quartz chamber that contains a ⌀$ 48 \times 58$ mm volume of liquid xenon. At this development stage, we have not aimed for perfect hermeticity of the quartz chamber. Our aim here is twofold: first, to demonstrate via the use of a calibration source that the presence of quartz materials in the TPC does not impact its operation; and second, to perform quantitative measurements of the TPC’s characteristics. We successfully measured electron drift velocities of 1.2–1.7 mm/$\mu$s in liquid xenon under electric fields ranging from 75–384 V/cm, and also observed small S2 signals produced by a single ionized electron with a light yield of 16.5 $\pm$ 0.5 PE. These results were consistent with the expected values; therefore, our demonstrations provide a proof of principle for TPCs incorporating a quartz chamber.

scholarly journals Self-shielding effect of a single phase liquid xenon detector for direct dark matter search

2012 ◽  
Vol 35 (10) ◽  
pp. 609-614 ◽  
Author(s):  
A. Minamino ◽  
K. Abe ◽  
Y. Ashie ◽  
J. Hosaka ◽  
K. Ishihara ◽  
...  
Keyword(s):  
Dark Matter ◽  
Single Phase ◽  
Shielding Effect ◽  
Liquid Xenon ◽  
Dark Matter Search ◽  
Phase Liquid ◽  
Direct Dark Matter

scholarly journals Dark atom solution for the puzzles of direct dark matter search

2021 ◽  
Author(s):  
Timur Bikbaev ◽  
Maxim Khlopov ◽  
Andrey Mayorov
Keyword(s):  
Dark Matter ◽  
Dark Matter Search ◽  
Direct Dark Matter

scholarly journals A Review of Basic Energy Reconstruction Techniques in Liquid Xenon and Argon Detectors for Dark Matter and Neutrino Physics Using NEST

Instruments ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 13
Author(s):  
Matthew Szydagis ◽  
Grant A. Block ◽  
Collin Farquhar ◽  
Alexander J. Flesher ◽  
Ekaterina S. Kozlova ◽  
...  
Keyword(s):  
Dark Matter ◽  
Neutrino Physics ◽  
Electric Fields ◽  
Direct Detection ◽  
Profile Likelihood ◽  
Liquid Argon ◽  
Energy Scale ◽  
Liquid Xenon ◽  
Nuclear Recoils ◽  
Available Information

Detectors based upon the noble elements, especially liquid xenon as well as liquid argon, as both single- and dual-phase types, require reconstruction of the energies of interacting particles, both in the field of direct detection of dark matter (weakly interacting massive particles WIMPs, axions, etc.) and in neutrino physics. Experimentalists, as well as theorists who reanalyze/reinterpret experimental data, have used a few different techniques over the past few decades. In this paper, we review techniques based on solely the primary scintillation channel, the ionization or secondary channel available at non-zero drift electric fields, and combined techniques that include a simple linear combination and weighted averages, with a brief discussion of the application of profile likelihood, maximum likelihood, and machine learning. Comparing results for electron recoils (beta and gamma interactions) and nuclear recoils (primarily from neutrons) from the Noble Element Simulation Technique (NEST) simulation to available data, we confirm that combining all available information generates higher-precision means, lower widths (energy resolution), and more symmetric shapes (approximately Gaussian) especially at keV-scale energies, with the symmetry even greater when thresholding is addressed. Near thresholds, bias from upward fluctuations matters. For MeV-GeV scales, if only one channel is utilized, an ionization-only-based energy scale outperforms scintillation; channel combination remains beneficial. We discuss here what major collaborations use.

scholarly journals Global interpretation of direct Dark Matter searches after CDMS-II results

2010 ◽  
Vol 2010 (02) ◽  
pp. 014-014 ◽  
Author(s):  
Joachim Kopp ◽  
Thomas Schwetz ◽  
Jure Zupan
Keyword(s):  
Dark Matter ◽  
Direct Dark Matter

Halo-independent analysis of direct dark matter detection through electron scattering

2021 ◽  
Vol 2021 (12) ◽  
pp. 048
Author(s):  
Muping Chen ◽  
Graciela B. Gelmini ◽  
Volodymyr Takhistov
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Dark Matter Halo ◽  
Dark Halo ◽  
Sufficient Energy ◽  
Independent Analysis ◽  
Dark Matter Detection ◽  
Dark Matter Scattering ◽  
Matter Detection ◽  
Direct Dark Matter

Abstract Sub-GeV mass dark matter particles whose collisions with nuclei would not deposit sufficient energy to be detected, could instead be revealed through their interaction with electrons. Analyses of data from direct detection experiments usually require assuming a local dark matter halo velocity distribution. In the halo-independent analysis method, properties of this distribution are instead inferred from direct dark matter detection data, which allows then to compare different data without making any assumption on the uncertain local dark halo characteristics. This method has so far been developed for and applied to dark matter scattering off nuclei. Here we demonstrate how this analysis can be applied to scattering off electrons.

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