scholarly journals A Rotationally Symmetric Lateral Distribution Function for Radio Emission from Inclined Air Showers

2019 ◽  
Vol 216 ◽  
pp. 03009 ◽  
Author(s):  
Tim Huege ◽  
Lukas Brenk ◽  
Felix Schlüter
Keyword(s):  
Cosmic Ray ◽  
Radiation Energy ◽  
Lateral Distribution ◽  
Air Showers ◽  
Radio Detection ◽  
Event Reconstruction ◽  
Rotationally Symmetric ◽  
Shower Maximum ◽  
Radio Signals ◽  
Charge Excess

Radio detection of inclined air showers is currently receiving great attention. To exploit the potential, a suitable event reconstruction needs to be developed. A crucial step in this direction is the development of a model for the lateral distribution of the radio signals, which in the case of inclined air showers exhibits asymmetries due to “earlylate” effects in addition to the usual asymmetries from the superposition of charge-excess and geomagnetic emission. We present a model which corrects for all asymmetries and successfully describes the lateral distribution of the energy fluence with a rotationally symmetric function. This gives access to the radiation energy as a measure of the energy of the cosmic-ray primary, and is also sensitive to the depth of the shower maximum.

scholarly journals Final results of the LOPES radio interferometer for cosmic-ray air showers

2021 ◽  
Vol 81 (2) ◽  
Author(s):  
W. D. Apel ◽  
◽  
J. C. Arteaga-Velázquez ◽  
L. Bähren ◽  
K. Bekk ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Lessons Learned ◽  
Detector Response ◽  
Air Showers ◽  
Detector Performance ◽  
Digital Radio ◽  
Radio Detection ◽  
Shower Maximum ◽  
Institute Of Technology ◽  
The Impact

AbstractLOPES, the LOFAR prototype station, was an antenna array for cosmic-ray air showers operating from 2003 to 2013 within the KASCADE-Grande experiment. Meanwhile, the analysis is finished and the data of air-shower events measured by LOPES are available with open access in the KASCADE Cosmic Ray Data Center (KCDC). This article intends to provide a summary of the achievements, results, and lessons learned from LOPES. By digital, interferometric beamforming the detection of air showers became possible in the radio-loud environment of the Karlsruhe Institute of Technology (KIT). As a prototype experiment, LOPES tested several antenna types, array configurations and calibration techniques, and pioneered analysis methods for the reconstruction of the most important shower parameters, i.e., the arrival direction, the energy, and mass-dependent observables such as the position of the shower maximum. In addition to a review and update of previously published results, we also present new results based on end-to-end simulations including all known instrumental properties. For this, we applied the detector response to radio signals simulated with the CoREAS extension of CORSIKA, and analyzed them in the same way as measured data. Thus, we were able to study the detector performance more accurately than before, including some previously inaccessible features such as the impact of noise on the interferometric cross-correlation beam. These results led to several improvements, which are documented in this paper and can provide useful input for the design of future cosmic-ray experiments based on the digital radio-detection technique.

scholarly journals Radio interferometry applied to the observation of cosmic-ray induced extensive air showers

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Harm Schoorlemmer ◽  
Washington R. Carvalho
Keyword(s):  
Cosmic Ray ◽  
High Energy ◽  
High Accuracy ◽  
Extensive Air Showers ◽  
Ultra High Energy ◽  
Air Showers ◽  
Interferometric Technique ◽  
Radio Detection ◽  
Cosmic Particle ◽  
Shower Maximum

AbstractWe developed a radio interferometric technique for the observation of extensive air showers initiated by cosmic particles. In this proof-of-principle study we show that properties of extensive air showers can be derived with high accuracy in a straightforward manner. When time synchronisation below $$\sim $$ ∼ 1 ns between different receivers can be achieved, direction reconstruction resolution of $$< 0.2^\circ $$ < 0 . 2 ∘ and resolution on the depth of shower maximum of $$<10$$ < 10  g/cm$$^2$$ 2 are obtained over the full parameter range studied, with even higher accuracy for inclined incoming directions. In addition, by applying the developed method to dense arrays of radio antennas, the energy threshold for the radio detection of extensive air showers can be significantly lowered. The proposed method can be incorporated in operational and future cosmic particle observatories and with its high accuracy it has the potential to play a crucial role in unravelling the composition of the ultra-high-energy cosmic-particle flux.

scholarly journals Towards online triggering for the radio detection of air showers using deep neural networks

2019 ◽  
Vol 216 ◽  
pp. 03004 ◽  
Author(s):  
Florian Föhrer ◽  
Tom Charnock ◽  
Anne Zilles ◽  
Matias Tueros
Keyword(s):  
Neural Networks ◽  
Deep Neural Networks ◽  
Air Showers ◽  
Air Shower ◽  
Single Antenna ◽  
Radio Detection ◽  
Radio Signals ◽  
Trigger Algorithm ◽  
Background Events ◽  
Online Reconstruction

The detection of air-shower events via radio signals requires the development of a trigger algorithm for 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 aswell as performing an online reconstruction of the shower parameters using neural networks.

scholarly journals Classification and recovery of radio signals from cosmic ray induced air showers with deep learning

2019 ◽  
Vol 14 (04) ◽  
pp. P04005-P04005 ◽  
Author(s):  
M. Erdmann ◽  
F. Schlüter ◽  
R. Šmída
Keyword(s):  
Deep Learning ◽  
Cosmic Ray ◽  
Air Showers ◽  
Radio Signals

Radio signals from air showers at 22 MHz

1968 ◽  
Vol 46 (10) ◽  
pp. S246-S249 ◽  
Author(s):  
J. R. Prescott ◽  
G. G. C. Palumbo ◽  
J. A. Galt ◽  
C. H. Costain
Keyword(s):  
Center Frequency ◽  
Effective Bandwidth ◽  
The South ◽  
Air Showers ◽  
The North ◽  
Radio Signals ◽  
Charge Excess ◽  
Plastic Scintillators ◽  
Field Lines ◽  
Dip Angle

Radio pulses from extensive air showers (EAS) have been observed with a 4 × 4 array of dipoles polarized E–W at a center frequency of 22.25 MHz and an effective bandwidth of 4 MHz. Observations were made simultaneously with antenna beams centered 30 °N and 30 °S of the zenith. The magnetic dip angle being 72°, the north beam faced across the geomagnetic field lines whereas the south beam faced along the field lines. In 600 hours of observation, 1 100 showers were recorded. Two 1-m2 plastic scintillators placed 30 m apart, in coincidence, triggered the cathode-ray-oscillograph recording system.Traces were scanned for 1 μs on either side of the expected location of the radio signals. Background levels were determined by scanning an interval of 0.75 μs, 3.5 μs after the beginning of the trace. Pulses were recorded on both antenna beams. Those on the north-pointing antenna were, on the average, twice as large as those on the south-pointing one. The results suggest that while charge separation in the earth's field is more important than charge excess in generating showers, it is not dominant.

Investigating the Characteristics of Longitudinal Profile of Primary Particles in Extensive Air Showers

2015 ◽  
Vol 754-755 ◽  
pp. 859-864
Author(s):  
A.A. Al-Rubaiee ◽  
Uda Hashim ◽  
Mohd Khairuddin Md Arshad ◽  
A. Rahim Ruslinda ◽  
R.M. Ayub ◽  
...  
Keyword(s):  
Charged Particles ◽  
Cosmic Ray ◽  
Primary Energy ◽  
Extensive Air Showers ◽  
Air Showers ◽  
Longitudinal Development ◽  
Extensive Air Shower ◽  
Primary Particles ◽  
Shower Maximum ◽  
Hadronic Model

One of the characteristics of longitudinal development of extensive air showers is the number of charged particles and depth of shower maximum in extensive air showers as a function of primary energy, which is often used to reconstruct the elemental composition of primary cosmic rays. Studying of extensive air shower characteristics was performed by investigating the longitudinal development parameters depending on Heitler model for different primary particles. The simulation of the number of charged particles and depth of shower maximum (NandXmax) in extensive air showers of particle cascades was performed using AIRES code for SIBYLL hadronic model for different primary particles like electron, positron, gamma quanta and iron nuclei at the energy range 1014-1019eV. The comparison between the simulated longitudinal development ofNandXmaxusing SIBYLL hadronic model with two hadronic models (QGSJET99 ans SIBYLL16) has shown an opportunity for determination of cosmic ray cascade interactions in extensive air showers.

scholarly journals Simulations of reflected radio signals from cosmic ray induced air showers

2015 ◽  
Vol 66 ◽  
pp. 31-38 ◽  
Author(s):  
Jaime Alvarez-Muñiz ◽  
Washington R. Carvalho ◽  
Daniel García-Fernández ◽  
Harm Schoorlemmer ◽  
Enrique Zas
Keyword(s):  
Cosmic Ray ◽  
Air Showers ◽  
Radio Signals
Sign in / Sign up

Export Citation Format

Share Document