By Thomas Meures
The aim of the venture offered during this ebook is to observe neutrinos created by means of resonant interactions of ultrahigh strength cosmic rays at the CMB photon box filling the Universe. during this pioneering first research, the writer places ahead a lot of the research framework, together with calibrations of the digital and antenna geometry, in addition to the improvement of algorithms for occasion reconstruction and information relief. whereas in simple terms of the 37 stations deliberate for the Askaryan Radio Array have been utilized in this evaluate of 10 months of knowledge, the research used to be capable of exclude neutrino fluxes above 10 PeV with a restrict now not faraway from the simplest present restrict set by way of the IceCube detector, a end result which establishes the radio detection procedure because the direction ahead to reaching the big volumes had to observe those ultrahigh strength neutrinos.
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Additional resources for Development of a Sub-glacial Radio Telescope for the Detection of GZK Neutrinos
The existence of UHECRs on the other hand has been proven, as visible in Fig. 3. Cosmic rays are at least accelerated to energies of 1020 eV but their abundance at these energies throughout the Universe is mostly unknown. It is possible to extrapolate the primary cosmic ray spectrum from the one observed on Earth when accounting for all known energy loss mechanisms. Due to large uncertainties on these losses, for example due to the unknown mass composition, the extrapolation will not be able to provide a very precise result.
Another radio detector of GZK neutrinos is the RICE array, the direct predecessor of the ARA detector . It is a small scale array of radio antennas deployed above the AMANDA detector at South Pole. Its purpose was, amongst others, the investigation of measurement conditions and testing of equipment. During its operation, the array collected more than 10 years of data, providing the neutrino limit shown in Fig. 17. In addition to the above mentioned, several neutrino detectors are planned or currently under construction, like the ARA detector.
This is not unexpected due to the high frequency and the radiation is thus not suitable to be used in large GZK neutrino detectors because a wide sensor spacing, which requires long signal reach, is not possible. • The other extreme is the regime of very low frequencies, below 10 MHz at which the emission of all particles becomes coherent. Then, only the negative excess charge contributes to the emission, but due to the coherence the emitted field strength scales linearly with the sum of all excess tracks.
Development of a Sub-glacial Radio Telescope for the Detection of GZK Neutrinos by Thomas Meures