2005
DOI: 10.1038/nature03614
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Detection and imaging of atmospheric radio flashes from cosmic ray air showers

Abstract: The nature of ultrahigh-energy cosmic rays (UHECRs) at energies >10 20 eV remains a mystery 1 . They are likely to be of extragalactic origin, but should be absorbed within ~50 Mpc through interactions with the cosmic microwave background. As there are no sufficient powerful accelerators within this distance

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Cited by 354 publications
(339 citation statements)
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“…The results of this analysis [15] were that (i) there is an unambiguous association of pulsed radio emission with air showers, and the KASCADE-reconstructed direction is consistent with the source of the radio emission, (ii) the radio field strength correlates very well with the muon number, which in turn correlates well with the primary particle energy, and (iii) the radio field strength correlates clearly with the angle between shower axis and earth's magnetic field (hereafter called geomagnetic angle). With this analysis, the "proof of principle" for radio detection of EAS with modern interferometric methods had been achieved.…”
Section: Lopes10 Resultsmentioning
confidence: 99%
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“…The results of this analysis [15] were that (i) there is an unambiguous association of pulsed radio emission with air showers, and the KASCADE-reconstructed direction is consistent with the source of the radio emission, (ii) the radio field strength correlates very well with the muon number, which in turn correlates well with the primary particle energy, and (iii) the radio field strength correlates clearly with the angle between shower axis and earth's magnetic field (hereafter called geomagnetic angle). With this analysis, the "proof of principle" for radio detection of EAS with modern interferometric methods had been achieved.…”
Section: Lopes10 Resultsmentioning
confidence: 99%
“…As of today, some properties of radio emission from EAS are well understood: The emission is clearly coherent as visible from the approximately linear scaling of field strength with energy seen in both experimental data and simulations [4,15]. Also, the fact that there is a pronounced correlation between the radio field strength and the geomagnetic angle indicates that a geomagnetic emission mechanism must be responsible for the dominant fraction of the emission [4,15,17].…”
Section: The Current Understandingmentioning
confidence: 99%
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“…As a part of the upgrade a small octagonal cluster, Piccolo, formed by eight scintillator stations spaced 20 m from each other, was integrated to provide an external trigger for the KASCADE and Grande arrays. Several radio (43 − 74 MHz) and microwave (3.4 − 4.2 GHz) antennas were added later, forming the LOPES [6] and the CROME experiments [7], respectively, which were used to explore and open new forms of EAS detection.…”
Section: Experimental Set-upmentioning
confidence: 99%
“…Forty years after the initial discovery of radio emission from extensive air showers [1], the CODALEMA [2] and LOPES [3] experiments have re-ignited very active research activities in the field of radio detection of cosmic ray air showers. Nowadays, the field is in a phase of transition from first-generation experiments covering an area of less than 0.1 km 2 to large-scale arrays of tens of km 2 .…”
Section: Introductionmentioning
confidence: 99%