Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection
Ongoing experimental efforts in Antarctica seek to detect ultra-high energy neutrinos by measurement of radio-frequency (RF) Askaryan radiation generated by the collision of a neutrino with an ice molecule. An array of RF antennas, deployed either in-ice or in-air, is used to infer the properties of...
Published in: | Journal of Cosmology and Astroparticle Physics |
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ftdesyvdb:oai:bib-pubdb1.desy.de:408516 2023-05-15T13:58:55+02:00 Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection Barwick, S. W. Berg, E. C. Kravchenko, I. Lahmann, R. Latif, U. Nam, J. Nelles, A. Persichilli, C. Sandstrom, P. Tatar, J. Unger, E. Besson, D. Z. Gaswint, G. Glaser, C. Hallgren, A. Hanson, J. C. Klein, S. R. Kleinfelder, S. Köpke, L. DE 2018 https://bib-pubdb1.desy.de/record/408516 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2018-02917%22 eng eng IOP info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2018-02917 info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1804.10430 info:eu-repo/semantics/altIdentifier/wos/WOS:000439838200004 info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2018/07/055 info:eu-repo/semantics/altIdentifier/issn/1475-7516 https://bib-pubdb1.desy.de/record/408516 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2018-02917%22 info:eu-repo/semantics/embargoedAccess Journal of cosmology and astroparticle physics 1807(07), 055 (2018). doi:10.1088/1475-7516/2018/07/055 info:eu-repo/classification/ddc/530 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftdesyvdb https://doi.org/10.1088/1475-7516/2018/07/055 https://doi.org/10.3204/PUBDB-2018-02917 2022-06-30T20:18:37Z Ongoing experimental efforts in Antarctica seek to detect ultra-high energy neutrinos by measurement of radio-frequency (RF) Askaryan radiation generated by the collision of a neutrino with an ice molecule. An array of RF antennas, deployed either in-ice or in-air, is used to infer the properties of the neutrino. To evaluate their experimental sensitivity, such experiments require a refractive index model for ray tracing radio-wave trajectories from a putative in-ice neutrino interaction point to the receiving antennas; this gives the degree of signal absorption or ray bending from source to receiver. The gradient in the density profile over the upper 200 meters of Antarctic ice, coupled with Fermat's least-time principle, implies ray "bending" and the existence of "forbidden" zones for predominantly horizontal signal propagation at shallow depths. After re-deriving the formulas describing such shadowing, we report on experimental results that, somewhat unexpectedly, demonstrate the existence of electromagnetic wave transport modes from nominally shadowed regions. The fact that this shadow-signal propagation is observed both at South Pole and the Ross Ice Shelf in Antarctica suggests that the effect may be a generic property of polar ice, with potentially important implications for experiments seeking to detect neutrinos. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf South pole South pole DESY Publication Database (PUBDB) Antarctic Ross Ice Shelf South Pole Journal of Cosmology and Astroparticle Physics 2018 07 055 055 |
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DESY Publication Database (PUBDB) |
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English |
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info:eu-repo/classification/ddc/530 |
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info:eu-repo/classification/ddc/530 Barwick, S. W. Berg, E. C. Kravchenko, I. Lahmann, R. Latif, U. Nam, J. Nelles, A. Persichilli, C. Sandstrom, P. Tatar, J. Unger, E. Besson, D. Z. Gaswint, G. Glaser, C. Hallgren, A. Hanson, J. C. Klein, S. R. Kleinfelder, S. Köpke, L. Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
topic_facet |
info:eu-repo/classification/ddc/530 |
description |
Ongoing experimental efforts in Antarctica seek to detect ultra-high energy neutrinos by measurement of radio-frequency (RF) Askaryan radiation generated by the collision of a neutrino with an ice molecule. An array of RF antennas, deployed either in-ice or in-air, is used to infer the properties of the neutrino. To evaluate their experimental sensitivity, such experiments require a refractive index model for ray tracing radio-wave trajectories from a putative in-ice neutrino interaction point to the receiving antennas; this gives the degree of signal absorption or ray bending from source to receiver. The gradient in the density profile over the upper 200 meters of Antarctic ice, coupled with Fermat's least-time principle, implies ray "bending" and the existence of "forbidden" zones for predominantly horizontal signal propagation at shallow depths. After re-deriving the formulas describing such shadowing, we report on experimental results that, somewhat unexpectedly, demonstrate the existence of electromagnetic wave transport modes from nominally shadowed regions. The fact that this shadow-signal propagation is observed both at South Pole and the Ross Ice Shelf in Antarctica suggests that the effect may be a generic property of polar ice, with potentially important implications for experiments seeking to detect neutrinos. |
format |
Article in Journal/Newspaper |
author |
Barwick, S. W. Berg, E. C. Kravchenko, I. Lahmann, R. Latif, U. Nam, J. Nelles, A. Persichilli, C. Sandstrom, P. Tatar, J. Unger, E. Besson, D. Z. Gaswint, G. Glaser, C. Hallgren, A. Hanson, J. C. Klein, S. R. Kleinfelder, S. Köpke, L. |
author_facet |
Barwick, S. W. Berg, E. C. Kravchenko, I. Lahmann, R. Latif, U. Nam, J. Nelles, A. Persichilli, C. Sandstrom, P. Tatar, J. Unger, E. Besson, D. Z. Gaswint, G. Glaser, C. Hallgren, A. Hanson, J. C. Klein, S. R. Kleinfelder, S. Köpke, L. |
author_sort |
Barwick, S. W. |
title |
Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
title_short |
Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
title_full |
Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
title_fullStr |
Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
title_full_unstemmed |
Observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
title_sort |
observation of classically 'forbidden' electromagnetic wave propagation and implications for neutrino detection |
publisher |
IOP |
publishDate |
2018 |
url |
https://bib-pubdb1.desy.de/record/408516 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2018-02917%22 |
op_coverage |
DE |
geographic |
Antarctic Ross Ice Shelf South Pole |
geographic_facet |
Antarctic Ross Ice Shelf South Pole |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf South pole South pole |
op_source |
Journal of cosmology and astroparticle physics 1807(07), 055 (2018). doi:10.1088/1475-7516/2018/07/055 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3204/PUBDB-2018-02917 info:eu-repo/semantics/altIdentifier/arxiv/arXiv:1804.10430 info:eu-repo/semantics/altIdentifier/wos/WOS:000439838200004 info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2018/07/055 info:eu-repo/semantics/altIdentifier/issn/1475-7516 https://bib-pubdb1.desy.de/record/408516 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2018-02917%22 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1088/1475-7516/2018/07/055 https://doi.org/10.3204/PUBDB-2018-02917 |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2018 |
container_issue |
07 |
container_start_page |
055 |
op_container_end_page |
055 |
_version_ |
1766267284800667648 |