scholarly journals Neutrino Vertex Reconstruction in South Pole Ice

2019 ◽  
Vol 216 ◽  
pp. 02011
Author(s):  
M. Beheler-Amass ◽  
A. Karle ◽  
J.L. Kelley ◽  
M.-Y. Lu
Keyword(s):  
Radio Signal ◽  
High Energy ◽  
Neutrino Energy ◽  
Index Of Refraction ◽  
South Pole ◽  
Ultra High Energy ◽  
Interaction Vertex ◽  
Energy Reconstruction ◽  
Radio Signals ◽  
Vertex Reconstruction

Reconstruction of potential ultra-high-energy (UHE) neutrino events at the Askaryan Radio Array (ARA) is complicated by the variable index of refraction of South Pole ice, leading to curved radio signal paths from the interaction vertex. Using a spline table framework for fast raytracing approximation, we perform a GPU-accelerated interferometric reconstruction of the event vertex. We also demonstrate how use of both direct and reflected/refracted radio signals can allow reconstruction of the distance to the interaction vertex, an important step towards neutrino energy reconstruction.

scholarly journals Broadband RF Phased Array Design with MEEP: Comparisons to Array Theory in Two and Three Dimensions

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 415
Author(s):  
Jordan C. Hanson
Keyword(s):  
Phased Array ◽  
High Energy ◽  
Index Of Refraction ◽  
Three Dimensions ◽  
Ultra High Energy ◽  
Array Design ◽  
Radar Systems ◽  
Array Detectors ◽  
5 Ghz ◽  
Future Work

Phased array radar systems have a wide variety of applications in engineering and physics research. Phased array design usually requires numerical modeling with expensive commercial computational packages. Using the open-source MIT Electrogmagnetic Equation Propagation (MEEP) package, a set of phased array designs is presented. Specifically, one and two-dimensional arrays of Yagi-Uda and horn antennas were modeled in the bandwidth [0.1–5] GHz, and compared to theoretical expectations in the far-field. Precise matches between MEEP simulation and radiation pattern predictions at different frequencies and beam angles are demonstrated. Given that the computations match the theory, the effect of embedding a phased array within a medium of varying index of refraction is then computed. Understanding the effect of varying index on phased arrays is critical for proposed ultra-high energy neutrino observatories which rely on phased array detectors embedded in natural ice. Future work will develop the phased array concepts with parallel MEEP, in order to increase the detail, complexity, and speed of the computations.

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 A STUDY ON ANISOTROPY IN THE ARRIVAL DIRECTIONS OF ULTRA-HIGH-ENERGY COSMIC RAYS OBSERVED BY PIERRE AUGER OBSERVATORY

2013 ◽  
Vol 28 (18) ◽  
pp. 1350075
Author(s):  
HANG BAE KIM
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Angular Distance ◽  
Pierre Auger Observatory ◽  
South Pole ◽  
Ultra High Energy ◽  
Background Contribution ◽  
High Energy Cosmic Rays ◽  
Centaurus A ◽  
Arrival Directions

We study the anisotropy in the arrival directions of Pierre Auger Observatory (PAO) ultra-high-energy cosmic rays (UHECRs), using the point source correlational angular distance distribution (CADD). The result shows that the anisotropy is characterized by one prominent excess region and one void region. The excess region is located near the Centaurus A direction, supporting that the Centaurus A is a promising UHECR source. The void region near the south pole direction may be used to limit the diffuse isotropic background contribution.

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%.

THE AMANDA NEUTRINO TELESCOPE

2005 ◽  
Vol 20 (14) ◽  
pp. 3096-3098 ◽  
Author(s):  
◽  
ANDREA SILVESTRI
Keyword(s):  
High Energy ◽  
Neutrino Telescope ◽  
Point Sources ◽  
South Pole ◽  
Ultra High Energy ◽  
Neutrino Detector ◽  
High Energy Neutrino ◽  
Diffuse Sources ◽  
Ultra High Energy Neutrinos ◽  
The Antarctic

We present recent results from the Antarctic Muon And Neutrino Detector Array (AMANDA), located at the South Pole in Antarctica. AMANDA-II, commissioned in 2000, is a multipurpose high energy neutrino telescope with a broad physics and astrophysics scope. We summarize the results from searches for a variety of sources of ultra-high energy neutrinos: TeV-PeV diffuse sources by measuring either muon tracks or cascades, neutrinos in excess of PeV by searching for muons traveling in the down-going direction and point sources.

scholarly journals UPDATED LIMITS ON THE ULTRA-HIGH ENERGY (UHE) NEUTRINO FLUX FROM THE RICE EXPERIMENT

2006 ◽  
Vol 21 (supp01) ◽  
pp. 153-157 ◽  
Author(s):  
I. KRAVCHENKO ◽  
C. COOLEY ◽  
D. SECKEL ◽  
J. ADAMS ◽  
S. CHURCHWELL ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Neutrino Flux ◽  
High Energy ◽  
South Pole ◽  
Ultra High Energy ◽  
Dipole Antennas ◽  
Radio Frequency Radiation ◽  
The Antarctic ◽  
Detector Modeling ◽  
Frequency Radiation

The RICE experiment (Radio Ice Cherenkov Experiment) at South Pole consists of an array of dipole antennas designed to detect the coherent radio frequency radiation produced by neutrino-induced showers in the Antarctic ice. We report updated limits on the ultra-high energy neutrino flux, based on RICE data taken between 2000 and 2004. These limits also reflect improvements in Monte Carlo simulations and detector modeling.

scholarly journals Energy reconstruction of hadron-initiated showers of ultra-high energy cosmic rays

2015 ◽  
Vol 69 ◽  
pp. 61-67 ◽  
Author(s):  
G. Ros ◽  
G.A. Medina-Tanco ◽  
A.D. Supanitsky ◽  
L. del Peral ◽  
M.D. Rodríguez-Frías
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Energy Reconstruction

An experiment to search for ultra high energy γ-ray sources from the south pole

1989 ◽  
Vol 276 (3) ◽  
pp. 622-627 ◽  
Author(s):  
N.J.T. Smith ◽  
J.C. Perrett ◽  
M.A. Pomerantz ◽  
A.M. Hillas ◽  
P.A. Ogden ◽  
...  
Keyword(s):  
High Energy ◽  
South Pole ◽  
Ultra High Energy ◽  
The South ◽  
Γ Ray
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