Centers and Institutes
Published December 5, 2022 | Version v1
Report Open

Radiofrequency Ice Dielectric Measurements at Summit Station, Greenland

Creators

  • 1. Université Libre de Bruxelles
  • 2. The Ohio State University
  • 3. University of Kansas
  • 4. University of Wisconsin-Madison
  • 5. Uppsala University
  • 6. Friedrich-Alexander-University Erlangen-Nürnberg
  • 7. Vrije Universiteit Brussel
  • 8. Michigan State University
  • 9. University of Chicago
  • 10. Deutsches Elektronen-Synchrotron DESY

Description

We recently reported (Aguilar and others, 2022) on the radio-frequency attenuation length of cold polar ice at Summit Station, Greenland, based on bistatic radar measurements of radio frequency bedrock echo strengths taken during the summer of 2021. Those data also include echoes attributed to stratified impurities or dielectric discontinuities within the ice sheet ("layers"), which allow studies of a) estimation of the relative contribution of coherent (discrete layers, e.g.) vs. incoherent (bulk volumetric, e.g.) scattering, b) the magnitude of internal layer reflection coefficients, c) limits on the azimuthal asymmetry of reflections ('birefringence'), and d) limits on signal dispersion in-ice over a bandwidth of ~100 MHz. We find that i) after averaging 10000 echo triggers, reflected signal observable over the thermal floor (to depths of approximately 1500 m) are consistent with being entirely coherent, ii) internal layer reflection coefficients are measured at approximately –60 to –70 dB, iii) birefringent effects for vertically propagating signals are smaller by an order of magnitude relative to comparable studies performed at South Pole, and iv) within our experimental limits, glacial ice is non-dispersive over the frequency band relevant for neutrino detection experiments.

Files

Radio_frequency_echo_measurements_at_Summit_Station__Greenland.pdf

Files (2.3 MB)

Additional details

Identifiers

Other
oai:uchicago.tind.io:5158

Funding

Belgian Funds for Scientific Research
FWO Programme for International Research Infrastructure
National Science Foundation
2118315
National Science Foundation
2112352
IceCube EPSCoR Initiative
2019597
German Research Foundation
NE 2031/2-1
Helmholtz Association
Initiative and Networking Fund
European Research Council
805486

UChicago Information

Division(s)
Physical Sciences Division
Department(s)
Physics
Center(s) or Institute(s)
Enrico Fermi Institute, Kavli Institute for Cosmological Physics