3 research outputs found
Sensitivity of the IceCube Upgrade to Atmospheric Neutrino Oscillations
IceCube DeepCore, the existing low-energy extension of the IceCube Neutrino
Observatory, was designed to lower the neutrino detection energy threshold to
the GeV range. A new extension, called the IceCube Upgrade, will consist of
seven additional strings installed within the DeepCore fiducial volume. The new
modules will have spacings of about 20 m horizontally and 3 m vertically,
compared to about 40-70 m horizontally and 7 m vertically in DeepCore. It will
be deployed in the polar season of 2025/26. This additional hardware features
new types of optical modules with multi-PMT configurations, as well as
calibration devices. This upgrade will more than triple the number of PMT
channels with respect to current IceCube, and will significantly enhance its
capabilities in the GeV energy range. However, the increased channel count also
poses new computational challenges for the event simulation, selection, and
reconstruction. In this contribution we present updated oscillation
sensitivities based on the latest advancements in simulation, event selection,
and reconstruction techniques.Comment: Presented at the 38th International Cosmic Ray Conference (ICRC2023).
See arXiv:2307.13047 for all IceCube contribution
Extending the IceCube search for neutrino point sources in the Northern sky with additional years of data
The IceCube Neutrino Observatory is a one-cubic-kilometer-sized neutrino
telescope deployed deep in the Antarctic ice at the South Pole. One of
IceCube's major goals is finding the origins of astrophysical high-energy
neutrinos. In 2022, IceCube identified the strongest point-like neutrino source
so far, the active galaxy NGC 1068. Analyzing 9 years of muon-neutrino data
from the Northern Sky recorded between 2011 and 2020, the emission from NGC
1068 is significant at 4.2. We present a planned extension to this
search with additional years of data. One of these years includes data from
2010 when IceCube was only partially constructed. We discuss the improvement in
sensitivity and discovery potential for neutrino point sources across the
Northern sky. We show that by building on the established analysis techniques,
previous observations could be improved, not only for NGC 1068 but for all
possible sources in the Northern sky.Comment: Presented at the 38th International Cosmic Ray Conference (ICRC2023).
See arXiv:2307.13047 for all IceCube contribution
IceCube -- Neutrinos in Deep Ice The Top 3 Solutions from the Public Kaggle Competition
During the public Kaggle competition "IceCube -- Neutrinos in Deep Ice",
thousands of reconstruction algorithms were created and submitted, aiming to
estimate the direction of neutrino events recorded by the IceCube detector.
Here we describe in detail the three ultimate best, award-winning solutions.
The data handling, architecture, and training process of each of these machine
learning models is laid out, followed up by an in-depth comparison of the
performance on the kaggle datatset. We show that on cascade events in IceCube
above 10 TeV, the best kaggle solution is able to achieve an angular resolution
of better than 5 degrees, and for tracks correspondingly better than 0.5
degrees. These performance measures compare favourably to the current
state-of-the-art in the field