scholarly journals NEUTRINO ASTRONOMY WITH ICECUBE

2009 ◽  
Vol 24 (20) ◽  
pp. 1543-1557 ◽  
Author(s):  
TYCE DeYOUNG
Keyword(s):  
Large Data ◽  
High Energy ◽  
Neutrino Telescope ◽  
Atmospheric Neutrinos ◽  
South Pole ◽  
Data Set ◽  
Fundamental Physics ◽  
Astrophysical Objects ◽  
Neutrino Astronomy ◽  
Under Construction

IceCube is a kilometer-scale high energy neutrino telescope under construction at the South Pole, a second-generation instrument expanding the capabilities of the AMANDA telescope. The scientific portfolio of IceCube includes the detection of neutrinos from astrophysical objects such as the sources of the cosmic rays, the search for dark matter, and fundamental physics using a very large data set of atmospheric neutrinos. The design and status of IceCube are briefly reviewed, followed by a summary of results to date from AMANDA and initial IceCube results from the 2007 run, with 22 of a planned 86 strings operational. The new infill array known as Deep Core, which will extend IceCube's capabilities to energies as low as 10 GeV, is also described.

scholarly journals Particle Physics with ORCA

2019 ◽  
Vol 207 ◽  
pp. 04003
Author(s):  
Alba Domi ◽  
Simon Bourret ◽  
Liam Quinn
Keyword(s):  
Dark Matter ◽  
Particle Physics ◽  
High Energy ◽  
Neutrino Telescope ◽  
Atmospheric Neutrinos ◽  
Sterile Neutrinos ◽  
Tau Neutrino ◽  
Neutrino Astronomy ◽  
Under Construction

KM3NeT is a Megaton-scale neutrino telescope currently under construction at the bottom of the Mediterranean Sea. When completed, it will consist of two separate detectors: ARCA (Astroparticle Research with Cosmics in the Abyss), optimised for high-energy neutrino astronomy, and ORCA (Oscillation Research with Cosmics in the Abyss) for neutrino oscillation studies of atmospheric neutrinos. The main goal of ORCA is the determination of the neutrino mass ordering (NMO). Nevertheless it is possible to exploit ORCA’s configuration to make other important measurements, such as sterile neutrinos, non standard interactions, tau-neutrino appearance, neutrinos from Supernovae, Dark Matter and Earth Tomography studies. Part of these analyses are summarized here.

ULTRA HIGH ENERGY NEUTRINO TELESCOPES

2006 ◽  
Vol 21 (08n09) ◽  
pp. 1914-1924
Author(s):  
PER OLOF HULTH
Keyword(s):  
Lake Baikal ◽  
High Energy ◽  
Atmospheric Neutrinos ◽  
South Pole ◽  
Ultra High Energy ◽  
The South ◽  
High Energy Neutrino ◽  
Neutrino Telescopes ◽  
Energy Neutrino ◽  
Neutrino Astronomy

The Neutrino Telescopes NT-200 in Lake Baikal, Russia and AMANDA at the South Pole, Antarctica have now opened the field of High Energy Neutrino Astronomy. Several other Neutrino telescopes are in the process of being constructed or very near realization. Several thousands of atmospheric neutrinos have been observed with energies up to several 100 TeV but so far no evidence for extraterrestrial neutrinos has been found.

scholarly journals Learning mid-IR emission spectra of PAH populations from observations

2019 ◽  
Vol 15 (S350) ◽  
pp. 406-407
Author(s):  
Sacha Foschino ◽  
Olivier Berné ◽  
Christine Joblin
Keyword(s):  
Emission Spectra ◽  
Large Data ◽  
Blind Signal Separation ◽  
Data Sets ◽  
Data Set ◽  
Blind Signal ◽  
James Webb Space Telescope ◽  
Astrophysical Objects ◽  
Polycyclic Aromatic ◽  
Ir Emission

AbstractObservations of the mid-infrared (mid-IR, 3-15 μm) spectra of photo-dissociation regions reveal ubiquitous, broad and intense emission bands, the aromatic infrared bands (AIBs), attributed to polycyclic aromatic hydrocarbons (PAHs). Studies of the AIBs showed spectral variations (e.g. in the band positions) between different astrophysical objects, or even within single object, thanks to hyperspectral images. The James Webb Space Telescope (JWST) will allow to get further spectral and spatial details compared to former space observatories. This will come with large data sets, which will require specific tools in order to perform efficient scientific analysis.We propose in this study a method based on blind signal separation to reduce the analysis of such large data set to that of a small number of elementary spectra, spectrally representative of the data set and physically interpretable as the spectra of populations of mid-IR emitters. The robustness and fastness of the method are improved compared to former algorithms. It is tested on a ISO-SWS data set, which approaches the best the characteristics of JWST data, from which four elementary spectra are extracted, attributed to cationic, neutral PAHs, evaporating very small grains and large and ionized PAHs.

Characterising sediments of a tropical sediment-starved shelf using cluster analysis of physical and geochemical variables

2015 ◽  
Vol 12 (2) ◽  
pp. 204 ◽  
Author(s):  
Lynda C. Radke ◽  
Jin Li ◽  
Grant Douglas ◽  
Rachel Przeslawski ◽  
Scott Nichol ◽  
...  
Keyword(s):  
Large Data ◽  
High Energy ◽  
Rate Coefficients ◽  
Geochemical Data ◽  
Clustering Methods ◽  
Data Set ◽  
Β Diversity ◽  
Published Evidence ◽  
Baseline Information ◽  
Geochemical Variables

Environmental context Australia's tropical marine estate is a biodiversity hotspot that is threatened by human activities. Analysis and interpretation of large physical and geochemistry data sets provides important information on processes occurring at the seafloor in this poorly known area. These processes help us to understand how the seafloor functions to support biodiversity in the region. Abstract Baseline information on habitats is required to manage Australia's northern tropical marine estate. This study aims to develop an improved understanding of seafloor environments of the Timor Sea. Clustering methods were applied to a large data set comprising physical and geochemical variables that describe organic matter (OM) reactivity, quantity and source, and geochemical processes. Arthropoda (infauna) were used to assess different groupings. Clusters based on physical and geochemical data discriminated arthropods better than geomorphic features. Major variations among clusters included grain size and a cross-shelf transition from authigenic-Mn–As enrichments (inner shelf) to authigenic-P enrichment (outer shelf). Groups comprising raised features had the highest reactive OM concentrations (e.g. low chlorin indices and C:N ratios, and high reaction rate coefficients) and benthic algal δ13C signatures. Surface area-normalised OM concentrations higher than continental shelf norms were observed in association with: (i) low δ15N, inferring Trichodesmium input; and (ii) pockmarks, which impart bottom–up controls on seabed chemistry and cause inconsistencies between bulk and pigment OM pools. Low Shannon–Wiener diversity occurred in association with low redox and porewater pH and published evidence for high energy. Highest β-diversity was observed at euphotic depths. Geochemical data and clustering methods used here provide insight into ecosystem processes that likely influence biodiversity patterns in the region.

scholarly journals High-Energy Neutrino Astronomy and the Baikal-GVD Neutrino Telescope

2021 ◽  
Vol 84 (4) ◽  
pp. 513-518
Author(s):  
A. D. Avrorin ◽  
A. V. Avrorin ◽  
V. M. Aynutdinov ◽  
R. Bannasch ◽  
Z. Bardáčová ◽  
...  
Keyword(s):  
High Energy ◽  
Neutrino Telescope ◽  
High Energy Neutrino ◽  
Energy Neutrino ◽  
Neutrino Astronomy

scholarly journals Observation of radio emissions from electron beams using an ice target

2019 ◽  
Vol 216 ◽  
pp. 02010
Author(s):  
Keiichi Mase ◽  
Daisuke Ikeda ◽  
Aya Ishihara ◽  
Hiroyuki Sagawa ◽  
Tatsunobu Shibata ◽  
...  
Keyword(s):  
Light Source ◽  
Electron Beams ◽  
High Energy ◽  
Neutrino Telescope ◽  
South Pole ◽  
The South ◽  
Telescope Array ◽  
Radio Emissions ◽  
Systematic Uncertainties ◽  
Radio Signals

To observe high energy cosmogenic neutrinos above 50 PeV, the large neutrino telescope ARA is being built at the South Pole. The ARA telescope detects neutrinos by observing radio signals by the Askaryan effect. We performed an experiment using 40 MeV electron beams of the Telescope Array Electron Light Source to verify the understanding of the Askaryan emission as well as the detector responses used in the ARA experiment. Clear coherent polarized radio signals were observed with and without an ice target. We found that the observed radio signals are consistent with simulation, showing that our understanding of the radio emissions and the detector responses are within the systematic uncertainties of the ARAcalTA experiment which is at the level of 30%.

scholarly journals The Belle II Experiment: Status and Physics Prospects

2018 ◽  
Vol 46 ◽  
pp. 1860082
Author(s):  
Jake Bennett
Keyword(s):  
Large Data ◽  
New Physics ◽  
Data Set ◽  
Meson Decays ◽  
Belle Detector ◽  
Large Data Set ◽  
Belle Ii ◽  
Lepton Decays ◽  
Under Construction

The Belle II experiment is now under construction at the KEK laboratory in Japan. This project represents a substantial upgrade to both the Belle detector and the KEKB accelerator. The Belle II experiment will record 50/ab of data, a factor of 50 more than that recorded by Belle. This large data set, combined with the low backgrounds and high trigger efficiencies characteristic of an [Formula: see text] experiment, should provide unprecedented sensitivity to new physics signatures in [Formula: see text] and [Formula: see text] meson decays, and in [Formula: see text] lepton decays. The experiment is scheduled to begin physics running in 2018.

EARLY YEARS OF HIGH-ENERGY NEUTRINO PHYSICS IN COSMIC RAYS AND NEUTRINO ASTRONOMY (1957-1962)

2006 ◽  
Vol 21 (supp01) ◽  
pp. 1-11 ◽  
Author(s):  
IGOR ZHELEZNYKH
Keyword(s):  
Neutrino Physics ◽  
Large Scale ◽  
High Energy ◽  
Early Years ◽  
Atmospheric Neutrinos ◽  
High Energy Neutrino ◽  
Neutrino Telescopes ◽  
Energy Neutrino ◽  
Deep Underground ◽  
Neutrino Astronomy

Ideas of deep underground and deep underwater detection of high-energy cosmic neutrinos were firstly suggested by Moisey Markov in the end of 50th. Frederic Reines was one of those who first detected high-energy atmospheric neutrinos in underground experiments in the middle of 60th (as well as low energy reactor neutrinos 10 years earlier!). Markov and Reines closely collaborated in 70th – 80th in discussion of alternative techniques for large-scale neutrino telescopes. Some events of 50 – 80 years relating to the development of a new branch of Astronomy – the High-Energy Neutrino Astronomy, in which Markov and Reines took part, were described in my talk at ARENA Workshop. Below the first part of my talk at the Workshop is presented describing discussions and meetings the neutrino physics and astrophysics relating to the period 1957-1962 when I was Markov's student and later post-graduated student.

scholarly journals IceCube: A Kilometer-Scale Neutrino Observatory at the South Pole

2005 ◽  
Vol 13 ◽  
pp. 949-950
Author(s):  
Francis Halzen
Keyword(s):  
Cosmic Rays ◽  
Particle Physics ◽  
High Energy ◽  
Neutrino Telescope ◽  
South Pole ◽  
Neutrino Detector ◽  
The South ◽  
High Energy Neutrino ◽  
Neutrino Telescopes ◽  
Diversity Of Science

AbstractSolving the century-old puzzle of how and where cosmic rays are accelerated mostly drives the design of high-energy neutrino telescopes. It calls, along with a diversity of science goals reaching particle physics, astrophysics and cosmology, for the construction of a kilometer-scale neutrino detector. This led to the IceCube concept to transform a kilometer cube of transparent Antarctic Ice, one mile below the South Pole, into a neutrino telescope.

scholarly journals THE SEARCH FOR NEUTRINO SOURCES BEYOND THE SUN

1996 ◽  
Vol 11 (19) ◽  
pp. 3393-3413 ◽  
Author(s):  
S. BARWICK ◽  
F. HALZEN ◽  
P.B. PRICE
Keyword(s):  
Particle Physics ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Neutrino Telescope ◽  
The Sun ◽  
Electromagnetic Showers ◽  
Electron Neutrinos ◽  
Neutrino Astronomy ◽  
Near Future

It is hoped that in the near future, neutrino astronomy, born with the identification of thermonuclear fusion in the sun and the particle processes controlling the fate of a nearby supernova, will reach throughout and beyond our galaxy and make measurements relevant to cosmology, astrophysics, cosmic-ray physics and particle physics. The construction of a high-energy neutrino telescope requires a huge volume of very transparent, deeply buried material, such as ocean water or ice, which acts as the medium for detecting the particles. The AMANDA1 muon and neutrino telescope, now operating four strings of photomultiplier tubes buried in deep ice at the South Pole, is scheduled to be expanded to a ten-string array. The data collected over the first two years cover the three basic modes in which such instruments are operated: (i) the burst mode which monitors the sky for supernovae, (ii) the detection of electromagnetic showers initiated by PeV-energy cosmic electron neutrinos, and (iii) muon trajectory reconstruction for neutrino and gamma-ray astronomy. We speculate on the possible architectures of kilometer-scale instruments, using early data as a guideline.

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