The XENON1T Data Distribution and Processing Scheme

The XENON experiment is looking for non-baryonic particle dark matter in the universe. The setup is a dual phase time projection chamber (TPC) filled with 3200 kg of ultra-pure liquid xenon. The setup is operated at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. We present a full overview of the computing scheme for data distribution and job management in XENON1T. The software package Rucio, which is developed by the ATLAS collaboration, facilitates data handling on Open Science Grid (OSG) and European Grid Infrastructure (EGI) storage systems. A tape copy at the Center for High Performance Computing (PDC) is managed by the Tivoli Storage Manager (TSM). Data reduction and Monte Carlo production are handled by CI Connect which is integrated into the OSG network. The job submission system connects resources at the EGI, OSG, SDSC's Comet, and the campus HPC resources for distributed computing. The previous success in the XENON1T computing scheme is also the starting point for its successor experiment XENONnT, which starts to take data in autumn 2019.Comment: 8 pages, 2 figures, CHEP 2018 proceeding

A Roadmap for HEP Software and Computing R&D for the 2020s

Particle physics has an ambitious and broad experimental programme for the coming decades. This programme requires large investments in detector hardware, either to build new facilities and experiments, or to upgrade existing ones. Similarly, it requires commensurate investment in the R&D of software to acquire, manage, process, and analyse the shear amounts of data to be recorded. In planning for the HL-LHC in particular, it is critical that all of the collaborating stakeholders agree on the software goals and priorities, and that the efforts complement each other. In this spirit, this white paper describes the R&D activities required to prepare for this software upgrade.Peer reviewe

The XENON1T Electronic-Recoil Excess

Our XENON collaboration has been operating a series of ultra-radiopure experiments to probe tiny momentum transfers, which may arise from cosmogenic particles. Traditionally, we interpret our results in terms of WIMP dark matter, where our latest XENON1T experiment is the most sensitive such detector to date. However, the observable signal is a rate of either recoiling nuclei (e.g. WIMPs) or electrons, where such a model-agnostic approach means that any excess or discovery may have multiple interpretations if only using XENON data. Even though XENON is primarily designed for observing nuclear recoils, the unprecedentedly low-radioactivity gives sensitivity to any new physical phenomena that may present itself via electronic recoils. Using our XENON1T data, we announced in June evidence (&gt;3σ) of an electronic-recoil excess. &nbsp; Different interpretations of this excess were explored, ranging from new physics such as solar axions (3.5σ), a neutrino magnetic moment (3.2σ), or bosonic dark matter (3σ local, 4σ global), to detector effects such as tritium (3.2σ) or argon. &nbsp; This result cannot be interpreted in isolation as for some interpretations, for example, there is strong tension with stellar evaporation.&nbsp; Additionally,&nbsp; detector-oriented backgrounds such as tritium and argon are inconsistent with external measurements. Accordingly, these has been extensive interest in the literature (&gt;126 papers) to find an explanation. I will review the field of dark-matter direct detection, present details on how XENON1T operated, provide details on this analysis, discuss interpretation attempts, and inform on how our new XENONnT experiment may provide the answers we crave.&nbsp; &nbsp; Password: 375113 &nbsp;</p

Designing a 3.8-GeV/c muon-decay ring and experiment sensitive to electronvolt-scale sterile neutrinos

The liquid-scintillator neutrino-detector (LSND) and mini booster neutrino experiment (MiniBooNE) experiments claim to observe the oscillation ῡµ→ ῡe, which can only be explained by additional neutrinos and is a claim that must be further tested. This thesis proposes a new accelerator and experiment called νSTORM to refute or confirm the oscillation these claims by studying the CPT-equivalent channel νe→νµ. A 3.8-GeV/c muon decay ring is proposed with neutrino detectors placed 20 m and 2000 m from the decay ring. The detector technology would be a magnetized iron sampling calorimeter, where the magnetic field is induced by a superconducting transmission line. In a frequentist study, the sensitivity of this experiment after 5 years would be &gt;10σ. The range of the thesis discussion starts with the proton front-end design and ends with neutrino parameter estimation. After describing the phenomenology of sterile neutrinos, the facility and detector performance work is presented. Finally, the systematics are explained before the sensitivity and parameter-estimation works are explained.</p

Designing a 3.8-GeV/c muon-decay ring and experiment sensitive to electronvolt-scale sterile neutrinos

The liquid-scintillator neutrino-detector (LSND) and mini booster neutrino experiment (MiniBooNE) experiments claim to observe the oscillation ῡµ→ ῡe, which can only be explained by additional neutrinos and is a claim that must be further tested. This thesis proposes a new accelerator and experiment called νSTORM to refute or confirm the oscillation these claims by studying the CPT-equivalent channel νe→νµ. A 3.8-GeV/c muon decay ring is proposed with neutrino detectors placed 20 m and 2000 m from the decay ring. The detector technology would be a magnetized iron sampling calorimeter, where the magnetic field is induced by a superconducting transmission line. In a frequentist study, the sensitivity of this experiment after 5 years would be >10σ. The range of the thesis discussion starts with the proton front-end design and ends with neutrino parameter estimation. After describing the phenomenology of sterile neutrinos, the facility and detector performance work is presented. Finally, the systematics are explained before the sensitivity and parameter-estimation works are explained.This thesis is not currently available in ORA

XENON1T/kodiaq: Production release

Used in XENON1T commissionin

The XENON1T Data Distribution and Processing Scheme

The XENON experiment is looking for non-baryonic particle dark matter in the universe. The setup is a dual phase time projection chamber (TPC) filled with 3200 kg of ultra-pure liquid xenon. The setup is operated at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. We present a full overview of the computing scheme for data distribution and job management in XENON1T. The software package Rucio, which is developed by the ATLAS collaboration, facilitates data handling on Open Science Grid (OSG) and European Grid Infrastructure (EGI) storage systems. A tape copy at the Centre for High Performance Computing (PDC) is managed by the Tivoli Storage Manager (TSM). Data reduction and Monte Carlo production are handled by CI Connect which is integrated into the OSG network. The job submission system connects resources at the EGI, OSG, SDSC’s Comet, and the campus HPC resources for distributed computing. The previous success in the XENON1T computing scheme is also the starting point for its successor experiment XENONnT, which starts to take data in autumn 2019

Long-Term Monitoring at the East and West Flower Garden Banks National Marine Sanctuary, 1998-2001: Final Report

An update of Texas A&M and Continental Shelf Associates studies designed to monitor the ongoing ecological health of the coral in the Flower Garden Banks (FGB). This is a deepwater, discontinuous reef that arcs along the outer continental shelf of the Gulf of Mexico and is the site of oil and gas operations that could potentially impact the integrity of the FGB