By Matthew Joseph Mottram
ISBN-10: 3642300316
ISBN-13: 9783642300318
ISBN-10: 3642300324
ISBN-13: 9783642300325
The winner of UCL's annual HEP thesis prize, this paintings describes an research of the knowledge from the second one flight of the Antarctica Impulsive brief Antenna (ANITA). ANITA is a balloon-borne test that searches for radio indications originating from ultra-high strength neutrinos and cosmic rays interacting with the Antarctic ice or air. the hunt for ultrahigh strength neutrinos of astrophysical foundation is without doubt one of the notable experimental demanding situations of the twenty first century. The ANITA scan was once designed to be the main delicate device to ultra-high power neutrinos that originate from the interactions of cosmic rays with the cosmic microwave history. The technique and result of the neutrino and cosmic ray searches are awarded within the thesis.
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Sample text
The LABRADOR chips contained a two hundred and sixty element switched capacitor array (SCA) for each of the nine input channels. 6 Gsa/s until the issue of a trigger command, at which time sampling on the one set of SCAs was frozen and read out into a digitizer. 3 Radio Frequency Signal Chain 43 bits of dynamic range. As each channel was sampled by four LABRADOR chips (a buffer depth of four), in the instance of the first trigger the remaining three chips would continue to sample. This significantly reduced the dead time that would be introduced by using only one LABRADOR chip for each channel, with digitisation of the frozen channels requiring ∼30 ms.
The FORTE satellite was launched in 1997 with the intention of testing nuclear detonation detection. Data from FORTE has also been used to set a limit on the UHE neutrino flux using radio observations of the Greenland ice-sheet over a 30–300 MHz bandwidth [67]. 26 3 Ultra-High Energy Astro-Particle Physics The Goldstone Lunar UHE Neutrino Experiment (GLUE) made use of the JPL/NASA Deep Space Network antennas at Goldstone, California, to observe the lunar regolith for signs of Askaryan radiation [68].
8 m separation between lower and nadir rings. The larger vertical baseline between antennas (compared to ∼1 m horizontal antenna separation) resulted in a better elevation than azimuth pointing resolution in event analysis. Due to size constraints on the ANITA-2 payload, it was not possible for the nadir ring of antennas to be in their flight positions during launch. To resolve this, the nadir antennas were attached to the main gondola frame via hinged aluminium struts which could be retracted prior to launch.
A Search for Ultra-High Energy Neutrinos and Cosmic-Rays with ANITA-2 by Matthew Joseph Mottram
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