Prospects for the Detection of High-Energy Cosmic Rays Using Radio Techniques

Astronomy and Astrophysics – Astrophysics

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Scientific paper

The determination of the origin of cosmic events with energy beyond 1018 eV remains a challenge in cosmic-ray physics. To determine the nature of these particles, their origin, and the way they are being accelerated, requires new efforts where radio detection will play a crucial role. Recently, the LOPES collaboration employed techniques based on the detection of geomagnetic synchrotron radiation. They achieved the first calibration between conventional techniques and digital radio. The cosmic-ray induced emission mechanism in more dense and radio-transparent media is called the Askaryan effect, presently exploited or under study at several experiments. I will discuss the initiatives from the Netherlands UHE Cosmic-ray Community (NUCC). At AUGER, we anticipate to deploy antennas from the radio telescope LOFAR using the 100% duty cycle of radio as a clear advantage. Both at Auger and at LOFAR itself, radio will be used to get additional information on the shower development in the atmosphere leading to a better understanding on the very origin of these rays. LOFAR will also be used to detect radio signals emitted during the impact of cosmic events on the surface of the Moon. Finally, the existence of salt domes in the northern-eastern part of the Netherlands offers the possibility to detect neutrinos in rock salt.

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