Speaker
Description
We present a novel methodology for extracting firn ice properties using reflection coefficients (`S11') of antennas lowered into boreholes. Experiments like the Radio Neutrino Observatory in Greenland (RNO-G) require precise firn index of refraction profiles for accurate reconstructions of incident neutrinos. Coupled with Finite-Difference Time Domain (FDTD) simulations, a depth-dependent S11 profile can be translated into a refractive index profile. Since the response of an antenna deployed into a dry borehole depends on the diameter of the hole, multi-year S11 measurements permit an estimate of borehole closure complementary to estimates based on calipers or other dedicated mechanical loggers. We present first results, based on data taken in August, 2024 from boreholes at Summit Station, Greenland.
| Collaboration(s) | RNO-G |
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