The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz
The relative permittivity ∊’ and attenuation ∊ in laboratory-grown, polycrystalline and single-crystal ice Ih are reported at 35 and 60 MHz in the temperature range —25ΰC to — 0.2 ΰ C.The∊’ and α at 35 MHz and — I°C are 3.208±;0.010 and 6.2 ± 0.1 dB/100 m, respectively. From a comparison between the...
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Cambridge University Press (CUP)
1975
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crcambridgeupr:10.1017/s002214300002178x 2024-09-15T18:15:39+00:00 The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz Johari, G. P. Charette, P. A. 1975 http://dx.doi.org/10.1017/s002214300002178x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002178X en eng Cambridge University Press (CUP) Journal of Glaciology volume 14, issue 71, page 293-303 ISSN 0022-1430 1727-5652 journal-article 1975 crcambridgeupr https://doi.org/10.1017/s002214300002178x 2024-06-26T04:04:17Z The relative permittivity ∊’ and attenuation ∊ in laboratory-grown, polycrystalline and single-crystal ice Ih are reported at 35 and 60 MHz in the temperature range —25ΰC to — 0.2 ΰ C.The∊’ and α at 35 MHz and — I°C are 3.208±;0.010 and 6.2 ± 0.1 dB/100 m, respectively. From a comparison between the respective ∊’ and α of the polycrystalline and single-crystal ice measured perpendicular to the c -axis, it is concluded that any anisotropy of polarization at these frequencies is so small as to be undetectable. Amongst several factors that may contribute to anisotropy in ice, electronic polarization contributes 0.0037 to the difference between the relative permittivity measured parallel and perpendicular to the c axis at — Iΰ C and at frequencies less than 500 THz. Experiments have shown that the plastic deformation resulting from a uniaxial compressive stress of up to 100 bar does not influence the ∊’ and α of ice at 35 and 60 MHz. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 14 71 293 303 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The relative permittivity ∊’ and attenuation ∊ in laboratory-grown, polycrystalline and single-crystal ice Ih are reported at 35 and 60 MHz in the temperature range —25ΰC to — 0.2 ΰ C.The∊’ and α at 35 MHz and — I°C are 3.208±;0.010 and 6.2 ± 0.1 dB/100 m, respectively. From a comparison between the respective ∊’ and α of the polycrystalline and single-crystal ice measured perpendicular to the c -axis, it is concluded that any anisotropy of polarization at these frequencies is so small as to be undetectable. Amongst several factors that may contribute to anisotropy in ice, electronic polarization contributes 0.0037 to the difference between the relative permittivity measured parallel and perpendicular to the c axis at — Iΰ C and at frequencies less than 500 THz. Experiments have shown that the plastic deformation resulting from a uniaxial compressive stress of up to 100 bar does not influence the ∊’ and α of ice at 35 and 60 MHz. |
format |
Article in Journal/Newspaper |
author |
Johari, G. P. Charette, P. A. |
spellingShingle |
Johari, G. P. Charette, P. A. The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz |
author_facet |
Johari, G. P. Charette, P. A. |
author_sort |
Johari, G. P. |
title |
The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz |
title_short |
The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz |
title_full |
The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz |
title_fullStr |
The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz |
title_full_unstemmed |
The Permittivity and Attenuation in Polycrystalline and Single-Crystal Ice Ih at 35 and 60 MHz |
title_sort |
permittivity and attenuation in polycrystalline and single-crystal ice ih at 35 and 60 mhz |
publisher |
Cambridge University Press (CUP) |
publishDate |
1975 |
url |
http://dx.doi.org/10.1017/s002214300002178x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002178X |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 14, issue 71, page 293-303 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300002178x |
container_title |
Journal of Glaciology |
container_volume |
14 |
container_issue |
71 |
container_start_page |
293 |
op_container_end_page |
303 |
_version_ |
1810453545134063616 |