Measurement of the real dielectric permittivity epsilon_r of glacial ice

Using data collected by the Askaryan Radio Array (ARA) experiment at the South Pole, we have used long-baseline propagation of radio-frequency signals to extract information on the radio-frequency index-of-refraction in South Polar ice, comparing the arrival times of directly propagating rays with refracted rays. We also observe indications, for the first time, of radio-frequency ice birefringence for signals propagating along predominantly horizontal trajectories, corresponding to an asymmetry of order 0.1% between the ordinary and extra-ordinary birefringent axes, numerically compatible with previous measurements of birefringent asymmetries for vertically-propagating radio-frequency signals at South Pole.

[1]  William H. Lee,et al.  Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A , 2018, Science.

[2]  D. Saltzberg,et al.  Measurements and modeling of near-surface radio propagation in glacial ice and implications for neutrino experiments , 2018, Physical Review D.

[3]  A. Nelles,et al.  Observation of classically `forbidden' electromagnetic wave propagation and implications for neutrino detection. , 2018, Journal of Cosmology and Astroparticle Physics.

[4]  Shih-Hao Wang.  Calibration, Performance, and Cosmic Ray Detection of ARIANNA-HCR Prototype Station , 2017 .

[5]  Interferometric Neutrino Event Reconstruction in Inhomogeneous Media with the Askaryan Radio Array , 2017 .

[6]  F. Halzen.  High-energy neutrino astrophysics , 2016, Nature Physics.

[7]  S. Kleinfelder,et al.  Radio detection of air showers with the ARIANNA experiment on the Ross Ice Shelf , 2016, 1612.04473.

[8]  S. Barwick,et al.  Design and Performance of the ARIANNA Hexagonal Radio Array Systems , 2014, 1410.7369.

[9]  P. Mészáros,et al.  Ultrahigh-energy cosmic ray production by turbulence in gamma-ray burst jets and cosmogenic neutrinos , 2016, 1607.00732.

[10]  M.-H. A. Huang,et al.  Performance of two Askaryan Radio Array stations and first results in the search for ultrahigh energy neutrinos , 2015, 1507.08991.

[11]  K. Bechtol,et al.  A technique for detection of PeV neutrinos using a phased radio array , 2015, 1504.08006.

[12]  J. Kelley,et al.  First constraints on the ultra-high energy neutrino flux from a prototype station of the Askaryan Radio Array , 2014, 1404.5285.

[13]  K. Casey,et al.  The 1500 m South Pole ice core: recovering a 40 ka environmental record , 2014, Annals of Glaciology.

[14]  J. Hanson.  The Performance and Initial Results of the ARIANNA Prototype , 2013 .

[15]  M. Ahlers,et al.  Minimal cosmogenic neutrinos , 2012, 1208.4181.

[16]  M. Z. Wang,et al.  Design and Initial Performance of the Askaryan Radio Array Prototype EeV Neutrino Detector at the South Pole , 2011, 1105.2854.

[17]  Denis Allard,et al.  Cosmogenic neutrinos: parameter space and detectabilty from PeV to ZeV , 2010, 1009.1382.

[18]  A. Ramos,et al.  Radio Frequency Birefringence in South Polar Ice and Implications for Neutrino Reconstruction , 2010, 1005.4589.

[19]  Y. Wang,et al.  The Antarctic Impulsive Transient Antenna ultra-high energy neutrino detector: Design, performance, and sensitivity for the 2006–2007 balloon flight , 2008, 0812.1920.

[20]  S. Barwick,et al.  South Polar in situ radio-frequency ice attenuation , 2005, Journal of Glaciology.

[21]  J. Meyers,et al.  In situ index-of-refraction measurements of the South Polar firn with the RICE detector , 2004, Journal of Glaciology.

[22]  R. C. Bay,et al.  Temperature profile for glacial ice at the South Pole: Implications for life in a nearby subglacial lake , 2002, Proceedings of the National Academy of Sciences of the United States of America.

[23]  D. Seckel,et al.  Neutrinos from propagation of ultrahigh-energy protons , 2001, astro-ph/0101216.

[24]  Austin Kovacs,et al.  A reassessment of the in-situ dielectric constant of polar firn , 1993 .

[25]  N. Hargreaves.  The Radio-Frequency Birefringence of Polar Ice , 1978, Journal of Glaciology.

[26]  G. de Q. Robin.  Velocity of radio waves in ice by means of a bore-hole interferometric technique , 1975 .

[27]  G. Askar’yan.  Coherent Radio Emission from Cosmic Showers in Air and in Dense Media , 1965 .

[28]  G. Askar’yan.  Excess negative charge of an electron-photon shower and its coherent radio emission , 1962 .

[29]  G. A. Askaryan,et al.  EXCESS NEGATIVE CHARGE OF ELECTRON-PHOTON SHOWER AND THE COHERENT RADIATION ORIGINATING FROM IT. RADIORECORDING OF SHOWERS UNDER THE GROUND AND ON THE MOON , 1962 .