In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for UHE neutrino astronomy

Details In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for UHE neutrino astronomy In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for UHE neutrino astronomy

2007-03-15

arxiv.org/abs/astro-ph/0703413v2

Astropart.Phys.29:130-157,2008

Astronomy and Astrophysics

Astrophysics

replacement of previous arXiv version with published version

Scientific paper

10.1016/j.astropartphys.2007.12.

Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a series of radioglaciological measurements performed approximately 10 km north of Taylor Dome Station, Antarctica from Dec. 6, 2006 - Dec. 16, 2006. Using RF signals broadcast from: a) an englacial discone, submerged to a depth of 100 meters and broadcasting to a surface dual polarization horn receiver, and b) a dual-polarization horn antenna on the surface transmitting signals which reflect off the underlying bed and back up to the surface receiver, we have made time-domain estimates of both the real (index-of-refraction) and imaginary (attenuation length) components of the complex ice dielectric constant. We have also measured the uniformity of ice response along two orthogonal axes in the horizontal plane. We observe a wavespeed asymmetry of order 0.1%, projected onto the vertical propagation axis, consistent with some previous measurements, but somewhat lower than others.

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