Searching for 0νββ Decay in <sup>136</sup>Xe: Toward the Ton-Scale and Beyond

Brunner, T.; Winslow, L. A.

doi:10.1080/10619127.2017.1315286

Cited by 10 publications

(7 citation statements)

References 18 publications

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“…In the case of Majorana neutrinos, current data from neutrinoless double-beta decay experiments such as KLZ and EXO have already ruled out m ν 0.6 eV (brown vertical JHEP04(2020)020 line) [61,63]. An updated version of KLZ, the KLZ-800, is currently probing m ν as low as 0.17 eV [64] (red vertical line) in the case of the normal hierarchy and the entire parameter space for the inverted hierarchy. If this experiment were to see a signal, we cannot immediately conclude that hierarchy is inverted based on the current cosmological bound of m ν < 0.12 eV, since the decaying neutrino paradigm would still admit a normal hierarchy.…”

Section: Jhep04(2020)020mentioning

confidence: 99%

Cosmological limits on the neutrino mass and lifetime

Chacko

Dev

et al. 2020

J. High Energ. Phys.

117

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At present, the strongest upper limit on m ν , the sum of neutrino masses, is from cosmological measurements. However, this bound assumes that the neutrinos are stable on cosmological timescales, and is not valid if the neutrino lifetime is less than the age of the universe. In this paper, we explore the cosmological signals of theories in which the neutrinos decay into invisible dark radiation on timescales of order the age of the universe, and determine the bound on the sum of neutrino masses in this scenario. We focus on the case in which the neutrinos decay after becoming non-relativistic. We derive the Boltzmann equations that govern the cosmological evolution of density perturbations in the case of unstable neutrinos, and solve them numerically to determine the effects on the matter power spectrum and lensing of the cosmic microwave background. We find that the results admit a simple analytic understanding. We then use these results to perform a Monte Carlo analysis based on the current data to determine the limit on the sum of neutrino masses as a function of the neutrino lifetime. We show that in the case of decaying neutrinos, values of m ν as large as 0.9 eV are still allowed by the data. Our results have important implications for laboratory experiments that have been designed to detect neutrino masses, such as KATRIN and KamLAND-ZEN.

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Section: Jhep04(2020)020mentioning

confidence: 99%

Cosmological limits on the neutrino mass and lifetime

Chacko

Dev

et al. 2020

J. High Energ. Phys.

117

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“…The current work focuses on low−temperature applications of MLI technique in current running or upcoming projected tonne−scale fundamental physics research programs, in particular, the dark matter (DM) and neutrinoless double beta decay (0νββ−decay) search experiments. MLI technique is being used in the DM search experiments like, EDELWEISS [13], CRESST [14], EURECA [15] and in the search of neutrinoless double beta decay experiments like, KamLAND−Zen [16], nEXO [17], CUORE [18], CDEX [19], GERDA [20] and in future LEGEND which is the union of GERDA and MAJORANA [21].…”

Section: Cold Wall Boundarymentioning

confidence: 99%

Improvement in the performance of multilayer insulation technique and impact in the rare physics search experiments

Singh,

Chaubey

et al. 2021

Preprint

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Providing thermal insulation to systems at very low temperature from surroundings, involves blocking the transport of thermal energy−regular or enhanced, taking place through radiative, conductive and convective processes. For instance, the enhancement of radiative heat transport that takes place by infra−red or far infra−red light at low temperature is due to diffractive propagation. The wavelength of light in this part of the spectrum usually lie in the range of mm to cms. Hence it can get bent across an obstacle while propagating forward. Apart from radiative, the convective and conductive processes also get affected due to appearance of non−linearities in the modes of lattice vibrations and anomalies in material transport due to the appearance of vorticity and turbulence in the intervening media. The Multilayer insulation (MLI) technique has offered a robust thermal protective mechanism to provide proper insulation to the cold walls of the cryostats from the heat of the surroundings (basically the radiation heat load). This work is focussed on the estimation of performance and efficiency of the MLI technique as well as exploration of its versatile applicability. Three different spacer materials such as Dacron, Glass−tissue, and Silk−net with radiation shields are selected for the intervening medium in the present study. This article explores the thermal performance of MLI system by changing the physical parameters (emissivity and residual gas pressure), varying the geometry of the radiation shields (perforation styles of radiation shields) and by analyzing the effect of arrangement of radiation shields on the conduction heat load. The predictions of analytical models−Modified Lockheed equation, Lockheed Martin Flat Plate equation and McIntosh's approach are compared for the performance of MLI systems and for the applicable choice in future experiments. This analysis is concluded by studying the possibility of using MLI technique in the health sector by reducing the evaporation rate of liquid Oxygen (LO 2 ) during pandemic situations e.g., in COVID−19.

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“…The Laser Ablation Ion Source (LAS) presented in this work is being developed to provide ions with well known mass to calibrate a multi-reflection time of flight mass spectrometer [20]. This development is part of the Ba-tagging development [21] that is being pursued for a potential upgrade to the nEXO detector [22].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Spatially Resolved Multi-Element Laser Ablation Ion Source

Murray,

Chambers,

Chen

et al. 2021

Preprint

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A laser ablation ion source (LAS) is a powerful tool by which diverse species of ions can be produced for mass spectrometer calibration, or surface study applications. It is necessary to frequently shift the laser position on the target to selectively ablate materials in a controlled manner, and to mitigate degradation of the target surface caused by ablation. An alternative to mounting the target onto a rotation wheel or − translation stage, is to shift the laser position with a final reflection from a motorized kinematic mirror mount. Such a system has been developed, assembled and characterized with a two axis motorized mirror and various metal targets. In the system presented here, ions are ablated from the target surface and guided by a 90 degree quadrupole bender to a Faraday cup where the ion current is measured. Spatially resolved scans of the target are produced by actuating the mirror motors, thus moving the laser spot across the target, and performing synchronous measurements of the ion current to construct 2D images of a target surface which can be up to 50 mm in diameter. The spatial resolution of the system has been measured by scanning the interfaces between metals such as steel and niobium, where it was demonstrated that the LAS can selectively ablate an area of diameter ≈50 m. This work informs the development of subsequent LAS systems, that are intended to serve as multi-element ion sources for commercial and custom-built time-of-flight mass spectrometers, or to selectively study surface specific regions of samples.

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Searching for 0νββ Decay in ¹³⁶Xe: Toward the Ton-Scale and Beyond

Cited by 10 publications

References 18 publications

Cosmological limits on the neutrino mass and lifetime

Cosmological limits on the neutrino mass and lifetime

Improvement in the performance of multilayer insulation technique and impact in the rare physics search experiments

Characterization of a Spatially Resolved Multi-Element Laser Ablation Ion Source

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Searching for 0νββ Decay in 136Xe: Toward the Ton-Scale and Beyond

Cited by 10 publications

References 18 publications

Cosmological limits on the neutrino mass and lifetime

Cosmological limits on the neutrino mass and lifetime

Improvement in the performance of multilayer insulation technique and impact in the rare physics search experiments

Characterization of a Spatially Resolved Multi-Element Laser Ablation Ion Source

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Product

Resources

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Searching for 0νββ Decay in ¹³⁶Xe: Toward the Ton-Scale and Beyond