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Towards online triggering for the radio detection of air showers using deep neural networks
Authors:
Florian Führer,
Tom Charnock,
Anne Zilles,
Matias Tueros
Abstract:
The detection of air-shower events via radio signals requires to develop a trigger algorithm for a clean discrimination between signal and background events in order to reduce the data stream coming from false triggers. In this contribution we will describe an approach to trigger air-shower events on a single-antenna level as well as performing an online reconstruction of the shower parameters usi…
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The detection of air-shower events via radio signals requires to develop a trigger algorithm for a clean discrimination between signal and background events in order to reduce the data stream coming from false triggers. In this contribution we will describe an approach to trigger air-shower events on a single-antenna level as well as performing an online reconstruction of the shower parameters using neural networks.
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Submitted 7 December, 2018; v1 submitted 6 September, 2018;
originally announced September 2018.
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High-precision measurements of extensive air showers with the SKA
Authors:
T. Huege,
J. D. Bray,
S. Buitink,
R. Dallier,
R. D. Ekers,
H. Falcke,
A. Haungs,
C. W. James,
L. Martin,
B. Revenu,
O. Scholten,
F. G. Schröder,
A. Zilles
Abstract:
As of 2023, the Square Kilometre Array will constitute the world's largest radio telescope, offering unprecedented capabilities for a diverse science programme in radio astronomy. At the same time, the SKA will be ideally suited to detect extensive air showers initiated by cosmic rays in the Earth's atmosphere via their radio emission. With its very dense and uniform antenna spacing in a fiducial…
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As of 2023, the Square Kilometre Array will constitute the world's largest radio telescope, offering unprecedented capabilities for a diverse science programme in radio astronomy. At the same time, the SKA will be ideally suited to detect extensive air showers initiated by cosmic rays in the Earth's atmosphere via their radio emission. With its very dense and uniform antenna spacing in a fiducial area of one km$^2$ and its large bandwidth of 50-350 MHz, the low-frequency part of the SKA will provide very precise measurements of individual cosmic ray air showers. These precision measurements will allow detailed studies of the mass composition of cosmic rays in the energy region of transition from a Galactic to an extragalactic origin. Also, the SKA will facilitate three-dimensional "tomography" of the electromagnetic cascades of air showers, allowing the study of particle interactions at energies beyond the reach of the LHC. Finally, studies of possible connections between air showers and lightning initiation can be taken to a new level with the SKA. We discuss the science potential of air shower detection with the SKA and report on the technical requirements and project status.
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Submitted 14 August, 2015;
originally announced August 2015.
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Measurement of South Pole ice transparency with the IceCube LED calibration system
Authors:
IceCube Collaboration,
M. G. Aartsen,
R. Abbasi,
Y. Abdou,
M. Ackermann,
J. Adams,
J. A. Aguilar,
M. Ahlers,
D. Altmann,
J. Auffenberg,
X. Bai,
M. Baker,
S. W. Barwick,
V. Baum,
R. Bay,
J. J. Beatty,
S. Bechet,
J. Becker Tjus,
K. -H. Becker,
M. Bell,
M. L. Benabderrahmane,
S. BenZvi,
J. Berdermann,
P. Berghaus,
D. Berley
, et al. (250 additional authors not shown)
Abstract:
The IceCube Neutrino Observatory, approximately 1 km^3 in size, is now complete with 86 strings deployed in the Antarctic ice. IceCube detects the Cherenkov radiation emitted by charged particles passing through or created in the ice. To realize the full potential of the detector, the properties of light propagation in the ice in and around the detector must be well understood. This report present…
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The IceCube Neutrino Observatory, approximately 1 km^3 in size, is now complete with 86 strings deployed in the Antarctic ice. IceCube detects the Cherenkov radiation emitted by charged particles passing through or created in the ice. To realize the full potential of the detector, the properties of light propagation in the ice in and around the detector must be well understood. This report presents a new method of fitting the model of light propagation in the ice to a data set of in-situ light source events collected with IceCube. The resulting set of derived parameters, namely the measured values of scattering and absorption coefficients vs. depth, is presented and a comparison of IceCube data with simulations based on the new model is shown.
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Submitted 22 January, 2013;
originally announced January 2013.
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An improved method for measuring muon energy using the truncated mean of dE/dx
Authors:
IceCube collaboration,
R. Abbasi,
Y. Abdou,
M. Ackermann,
J. Adams,
J. A. Aguilar,
M. Ahlers,
D. Altmann,
K. Andeen,
J. Auffenberg,
X. Bai,
M. Baker,
S. W. Barwick,
V. Baum,
R. Bay,
K. Beattie,
J. J. Beatty,
S. Bechet,
J. Becker Tjus,
K. -H. Becker,
M. Bell,
M. L. Benabderrahmane,
S. BenZvi,
J. Berdermann,
P. Berghaus
, et al. (255 additional authors not shown)
Abstract:
The measurement of muon energy is critical for many analyses in large Cherenkov detectors, particularly those that involve separating extraterrestrial neutrinos from the atmospheric neutrino background. Muon energy has traditionally been determined by measuring the specific energy loss (dE/dx) along the muon's path and relating the dE/dx to the muon energy. Because high-energy muons (E_mu > 1 TeV)…
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The measurement of muon energy is critical for many analyses in large Cherenkov detectors, particularly those that involve separating extraterrestrial neutrinos from the atmospheric neutrino background. Muon energy has traditionally been determined by measuring the specific energy loss (dE/dx) along the muon's path and relating the dE/dx to the muon energy. Because high-energy muons (E_mu > 1 TeV) lose energy randomly, the spread in dE/dx values is quite large, leading to a typical energy resolution of 0.29 in log10(E_mu) for a muon observed over a 1 km path length in the IceCube detector. In this paper, we present an improved method that uses a truncated mean and other techniques to determine the muon energy. The muon track is divided into separate segments with individual dE/dx values. The elimination of segments with the highest dE/dx results in an overall dE/dx that is more closely correlated to the muon energy. This method results in an energy resolution of 0.22 in log10(E_mu), which gives a 26% improvement. This technique is applicable to any large water or ice detector and potentially to large scintillator or liquid argon detectors.
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Submitted 9 November, 2012; v1 submitted 16 August, 2012;
originally announced August 2012.
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Use of event-level neutrino telescope data in global fits for theories of new physics
Authors:
P. Scott,
C. Savage,
J. Edsjö,
the IceCube Collaboration,
:,
R. Abbasi,
Y. Abdou,
M. Ackermann,
J. Adams,
J. A. Aguilar,
M. Ahlers,
D. Altmann,
K. Andeen,
J. Auffenberg,
X. Bai,
M. Baker,
S. W. Barwick,
V. Baum,
R. Bay,
K. Beattie,
J. J. Beatty,
S. Bechet,
J. Becker Tjus,
K. -H. Becker,
M. Bell
, et al. (253 additional authors not shown)
Abstract:
We present a fast likelihood method for including event-level neutrino telescope data in parameter explorations of theories for new physics, and announce its public release as part of DarkSUSY 5.0.6. Our construction includes both angular and spectral information about neutrino events, as well as their total number. We also present a corresponding measure for simple model exclusion, which can be u…
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We present a fast likelihood method for including event-level neutrino telescope data in parameter explorations of theories for new physics, and announce its public release as part of DarkSUSY 5.0.6. Our construction includes both angular and spectral information about neutrino events, as well as their total number. We also present a corresponding measure for simple model exclusion, which can be used for single models without reference to the rest of a parameter space. We perform a number of supersymmetric parameter scans with IceCube data to illustrate the utility of the method: example global fits and a signal recovery in the constrained minimal supersymmetric standard model (CMSSM), and a model exclusion exercise in a 7-parameter phenomenological version of the MSSM. The final IceCube detector configuration will probe almost the entire focus-point region of the CMSSM, as well as a number of MSSM-7 models that will not otherwise be accessible to e.g. direct detection. Our method accurately recovers the mock signal, and provides tight constraints on model parameters and derived quantities. We show that the inclusion of spectral information significantly improves the accuracy of the recovery, providing motivation for its use in future IceCube analyses.
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Submitted 1 October, 2012; v1 submitted 3 July, 2012;
originally announced July 2012.