As liquid xenon detectors grow in scale, novel techniques are required to maintain sufficient purity for charges to survive across longer drift paths. The Xeclipse facility at Columbia University was ...built to test the removal of electronegative impurities through cryogenic filtration powered by a liquid xenon pump, enabling a far higher mass flow rate than gas-phase purification through heated getters. In this paper, we present results from Xeclipse, including measured oxygen removal rates for two sorbent materials, which were used to guide the design and commissioning of the XENONnT liquid purification system. Thanks to this innovation, XENONnT has achieved an electron lifetime greater than
10
ms
in an
∼
8.6
tonne
total mass, perhaps the highest purity ever measured liquid xenon detector.
Current trends within both religious and secular communities suggest that contemporary times mean that people spend more time alone than with others. Community engagement in general has been ...declining, while religious and spiritual community engagement in particular has dropped off significantly in recent decades, and most especially following the COVID-19 global pandemic. Although humans are social beings and benefit from community engagement, we tend to avoid or minimize our affiliations and associations, including our religious and spiritual ones today. Religious and spiritual communities must adapt to changing times or risk becoming irrelevant, diminishing further, and losing their sustainability to continue with their activities and services. Religious communities might wish to consider the best state-of-the-art evidence-based practices to engage their members, as well as appeal to those who might be interested in joining with them. There are many mental and physical health benefits to active engagement with spiritual religious practices and communities. The world could use more rather than less community engagement, including religious and spiritual engagement, during our challenging contemporary times.
The dependence of the light and charge yield of liquid xenon on the applied electric field and recoil energy is important for dark matter detectors using liquid xenon time projections chambers. Few ...measurements have been made of this field dependence at recoil energies less than 10 keV. In this paper, we present results of such measurements using a specialized detector. Recoil energies are determined via the Compton coincidence technique at four drift fields relevant for liquid xenon dark matter detectors: 0.19, 0.48, 1.02, and 2.32 kV/cm. Mean recoil energies down to 1 keV were measured with unprecedented precision. We find that the charge and light yield are anticorrelated above ∼3 keV and that the field dependence becomes negligible below ∼6 keV. However, below 3 keV, we find a charge yield significantly higher than expectation and a reconstructed energy deviating from linearity.
We report results of a search for light (≲10 GeV) particle dark matter with the XENON10 detector. The event trigger was sensitive to a single electron, with the analysis threshold of 5 electrons ...corresponding to 1.4 keV nuclear recoil energy. Considering spin-independent dark matter-nucleon scattering, we exclude cross sections σ(n)>7×10(-42) cm(2), for a dark matter particle mass m(χ)=7 GeV. We find that our data strongly constrain recent elastic dark matter interpretations of excess low-energy events observed by CoGeNT and CRESST-II, as well as the DAMA annual modulation signal.
The Roman Catholic Church has received a remarkable amount of press attention regarding clerical perpetrated sexual abuse with child victims as well as other clerical behavioral scandals in recent ...years. Much has been reported in both the popular and professional press about the various aspects and elements of priestly formation and ministry that might contribute to behavioral problems among clerics. Additionally, much has also been written and discussed about the challenging religious, spiritual, and behavioral struggles among clerics when clerical misbehavior significantly contradicts expected behavior in terms of sexual, behavioral, and relational ethics. Since Catholic priests are dedicated to chastity, obedience, and, among religious order clerics, poverty, both Catholics and non-Catholics alike expect and demand highly virtuous behavior from these men that they believe should be beyond reproach. Clericalism contributes to the gap between expected and actual behavior and creates an environment and culture where problem behavior and struggles are too often ignored. This article seeks to unpack some of the challenging dynamics of clericalism and demonstrate how it negatively contributes to religious, spiritual, moral, and behavioral struggles among Catholic clerics.
Dual-phase liquid xenon (LXe) detectors lead the direct search for particle dark matter. Understanding the signal production process of nuclear recoils in LXe is essential for the interpretation of ...LXe based dark matter searches. Up to now, only two experiments have simultaneously measured both the light and charge yield at different electric fields, neither of which attempted to evaluate the processes leading to light and charge production. In this paper, results from a neutron calibration of liquid xenon with simultaneous light and charge detection are presented for nuclear recoil energies from 3–74 keV, at electric fields of 0.19, 0.49, and 1.02 kV / cm . No significant field dependence of the yields is observed.
We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso for 13 months during 2011 and 2012. XENON100 features an ultralow ...electromagnetic background of (5.3 ± 0.6) × 10(-3) events/(keV(ee) × kg × day) in the energy region of interest. A blind analysis of 224.6 live days × 34 kg exposure has yielded no evidence for dark matter interactions. The two candidate events observed in the predefined nuclear recoil energy range of 6.6-30.5 keV(nr) are consistent with the background expectation of (1.0 ± 0.2) events. A profile likelihood analysis using a 6.6-43.3 keV(nr) energy range sets the most stringent limit on the spin-independent elastic weakly interacting massive particle-nucleon scattering cross section for weakly interacting massive particle masses above 8 GeV/c(2), with a minimum of 2 × 10(-45) cm(2) at 55 GeV/c(2) and 90% confidence level.
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