Parametrization of the Relative Amplitude of Geomagnetic and Askaryan Radio Emission from Cosmic-Ray Air Showers using CORSIKA/CoREAS Simulations

Radio emission from cosmic ray air showers has the potential to become an additional, cost-effective observing technique for cosmic ray research, being largely complementary to the well-established particle detector and air fluorescence techniques. We present Monte Carlo simulations of radio emission from extensive air showers in the scheme of coherent geosynchrotron radiation from electron-positron pairs gyrating in the earth's magnetic field. Preliminary results of our simulations are the predicted frequency, primary particle energy, shower zenith angle, shower azimuth angle and polarization dependence of the radio emission. These properties can be directly related to data measured by LOPES and other experiments.

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First analysis of inclined air showers detected by Tunka-Rex

EPJ Web of Conferences ◽

10.1051/epjconf/201921602012 ◽

2019 ◽

Vol 216 ◽

pp. 02012

Author(s):

T. Marshalkina ◽

P.A. Bezyazeekov ◽

N.M. Budnev ◽

D. Chernykh ◽

O. Fedorov ◽

...

Keyword(s):

Magnetic Field ◽

Radio Emission ◽

Zenith Angle ◽

Cosmic Ray ◽

High Energy ◽

Ultra High Energy ◽

Air Showers ◽

Standard Analysis ◽

Air Shower ◽

The Magnetic Field

The Tunka Radio Extension (Tunka-Rex) is a digital antenna array for the detection of radio emission from cosmic-ray air showers in the frequency band of 30 to 80 MHz and for primary energies above 100 PeV. The standard analysis of Tunka-Rex includes events with zenith angle of up to 50?. This cut is determined by the efficiency of the external trigger. However, due to the air-shower footprint increasing with zenith angle and due to the more efficient generation of radio emission (the magnetic field in the Tunka valley is almost vertical), there are a number of ultra-high-energy inclined events detected by Tunka-Rex. In this work we present a first analysis of a subset of inclined events detected by Tunka-Rex. We estimate the energies of the selected events and test the efficiency of Tunka-Rex antennas for detection of inclined air showers.

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Determining atmospheric electric fields through radio emission from air showers

EPJ Web of Conferences ◽

10.1051/epjconf/201921603010 ◽

2019 ◽

Vol 216 ◽

pp. 03010

Author(s):

Gia Trinh ◽

Olaf Scholten ◽

Ute Ebert ◽

Hidde Leijnse ◽

Casper Rutjes

Keyword(s):

Radio Emission ◽

Electric Fields ◽

Cosmic Ray ◽

Thunderstorm Activity ◽

Fair Weather ◽

Air Showers

During thunderstorm conditions the radio footprint (intensity as well as polarization) of cosmic ray showers deviates strongly from those measured during fair weather. We have been able to interpret this pattern in terms of atmospheric electric fields. We see that even when there is no thunderstorm activity within 100 km distance within an hour of the event, the radio footprint may be strongly affected

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Estimating the mass of cosmic rays by combining radio and muon measurements

EPJ Web of Conferences ◽

10.1051/epjconf/201921602002 ◽

2019 ◽

Vol 216 ◽

pp. 02002 ◽

Cited By ~ 1

Author(s):

Ewa M. Holt

Keyword(s):

Radio Emission ◽

Cosmic Ray ◽

Mass Separation ◽

New Method ◽

Alternative Methods ◽

Air Showers ◽

Particle Detectors ◽

Particle Measurements ◽

Air Shower ◽

Comparable Performance

The Auger Engineering Radio Array (AERA) is a radio detector at the Pierre Auger Observatory and it is dedicated to measure the radio emission of cosmic-ray air showers. AERA is co-located with the underground muon detectors of the Auger Muons and Infill for the Ground Array (AMIGA). This provides a perfect setup to experimentally test the benefits of combining muons and radio emission for estimating the primary mass. We have investigated this combination using air-shower simulations. We compared the performance for mass separation of this new method to alternative methods in which the electrons and muons are measured with particle detectors at the surface. Forshowers with zenith angles below 50° the new method is of comparable performance, and for showers more inclinedthan 50° it is clearly superior. Therefore, measuring the radio signal in addition to the muons significantly improves the mass sensitivity compared to techniques using solely particle measurements.

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