A Simple and Cost-Effective Passive Radar Technique for Ultra High Energy Cosmic Ray Detection

Damazio, D. Oliveira; Falcone, Todd E.; Mehta, Natasha; Takai, H.

doi:10.1016/j.nuclphysbps.2004.08.034

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…It is known that meteor burn in the upper atmosphere between 70 to 110 km [18], whilst cosmic ray should produce the peak of their ionization within a few kilometers (around 12 km) from Earth's surface as our simulations indicate [6]. This suggest that with four stations we should be able to pinpoint the signal source altitude for event discrimination.…”

Section: Resultsmentioning

confidence: 53%

“…The next step is to cross correlate this events with the variation of the barometric pressure. Cosmic ray counting rate vary as a function of the barometric pressure [6], so the verification of this for our experimental setup is being pursued.…”

Section: Resultsmentioning

confidence: 99%

“…The meteor trail is formed by a plasma that scatters radio waves from distant sources, sometimes thousands of km away. EECR also produce large free electrons densities [6]. Simulations show that 10 14 electrons per cubic meter for a 10 18 eV EECR can be achieved and, therefore, radio wave scattering can be expected.…”

Section: Introductionmentioning

confidence: 97%

“…Bldg 510A. Upton -NY -11955 USA to meteor detection have already been published [6], [15]. The data acquisition system used was built around the ICOM PCR 1000 computer controlled radio, a professional grade sound card and a personal computer.…”

Section: Introductionmentioning

confidence: 99%

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The cosmic ray radio detector data acquisition system

Damazio¹,

Takai²

IEEE Symposium Conference Record Nuclear Science 2004.

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Abstract-Cosmic rays with kinetic energy larger than 10 20 eV have been detected by two experiments, AGASA and HIRES. The nature and origin of these particles are not known. Acceleration mechanisms that can produce particles at these energies could be due to yet unknown sources of energy. The extreme energy cosmic rays (EECR) are rare reaching earth at a rate of few per square kilometer per year. The rarity of these events implies that large detector arrays are required making construction cost one of the main issues. We are exploring the possibility to detect EECR using bi-static radar technique. For a proof of principle we use broadcast TV stations as source of RF. After our first round of data taking, a more reliable DAQ was built addressing problems found such as loss of data and inaccurate time stamping. The new DAQ design uses a real time operating system and multithreaded software. To solve the time stamping problem, a GPS bit stream and the precision 1 PPS are now included in the data stream.

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Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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The cosmic ray radio detector data acquisition system

Damazio¹,

Takai²

IEEE Symposium Conference Record Nuclear Science 2004.

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The no-reflection regime of radar detection of cosmic ray air showers

Бакунов¹,

Maslov²,

Novokovskaya³

et al. 2015

New J. Phys.

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The ionization front of a cosmic ray air shower propagates in the atmosphere with almost the speed of light in vacuum, i.e., faster than a radio wave in the air. There can be no reflection of a radar signal from such a front. Instead, an additional transmitted wave, which travels behind the front in the backward direction, is generated. We study the frequencies, propagation directions, and amplitudes for the waves excited at the front and discuss their use for radar detection of air showers.

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