Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance
P(論文) A sounding rocket measurement was made, using a plastic scintillation counter and two proportional counters, of the high energy electrons greater than 40 keV at Syowa Station (L=6.1), Antarctica, in order to search fundamental properties of the energetic electrons under the geomagnetic quiet c...
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ftnipr:oai:nipr.repo.nii.ac.jp:00000903 2024-09-09T19:04:03+00:00 Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance Kodama, Masahiro Imai, Takashi Takeuchi, Hajime Wada, Masami 1978-10 application/pdf https://nipr.repo.nii.ac.jp/record/903/files/KJ00000011876.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 9 11 23 AA00733561 https://nipr.repo.nii.ac.jp/record/903/files/KJ00000011876.pdf 1978 ftnipr 2024-06-17T04:04:30Z P(論文) A sounding rocket measurement was made, using a plastic scintillation counter and two proportional counters, of the high energy electrons greater than 40 keV at Syowa Station (L=6.1), Antarctica, in order to search fundamental properties of the energetic electrons under the geomagnetic quiet condition unaccompanied with auroral phenomena. Energy spectra and pitch angle distributions of the electrons were determined as functions of altitude, on the basis of spin-modulated data obtained in the altitude range 70km-120km. Peak fluxes were found of the order of (10)^3/(cm)^2・ster・sec・keV. The pitch angle distribution over the angle range of 0°-135°peaked at a pitch angle somewhat smaller than 90°, and total integrated fluxes of electrons having pitch angles smaller than 90°were beyond those having pitch angles greater than 90°. Such asymmetry of distribution was established for different energies and altitudes. The exponent of the power law fitting the energy spectrum decreased steadily from 5.7 to 4.0 with increasing pitch angle from 10°to 90°. Fractional contribution of upward and downward electrons is discussed. departmental bulletin paper Other/Unknown Material Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Syowa Station |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
P(論文) A sounding rocket measurement was made, using a plastic scintillation counter and two proportional counters, of the high energy electrons greater than 40 keV at Syowa Station (L=6.1), Antarctica, in order to search fundamental properties of the energetic electrons under the geomagnetic quiet condition unaccompanied with auroral phenomena. Energy spectra and pitch angle distributions of the electrons were determined as functions of altitude, on the basis of spin-modulated data obtained in the altitude range 70km-120km. Peak fluxes were found of the order of (10)^3/(cm)^2・ster・sec・keV. The pitch angle distribution over the angle range of 0°-135°peaked at a pitch angle somewhat smaller than 90°, and total integrated fluxes of electrons having pitch angles smaller than 90°were beyond those having pitch angles greater than 90°. Such asymmetry of distribution was established for different energies and altitudes. The exponent of the power law fitting the energy spectrum decreased steadily from 5.7 to 4.0 with increasing pitch angle from 10°to 90°. Fractional contribution of upward and downward electrons is discussed. departmental bulletin paper |
author |
Kodama, Masahiro Imai, Takashi Takeuchi, Hajime Wada, Masami |
spellingShingle |
Kodama, Masahiro Imai, Takashi Takeuchi, Hajime Wada, Masami Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance |
author_facet |
Kodama, Masahiro Imai, Takashi Takeuchi, Hajime Wada, Masami |
author_sort |
Kodama, Masahiro |
title |
Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance |
title_short |
Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance |
title_full |
Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance |
title_fullStr |
Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance |
title_full_unstemmed |
Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica I. Characteristics of Electrons under no Geomagnetic Disturbance |
title_sort |
rocket measurements of auroral-zone energetic electrons at syowa station, antarctica i. characteristics of electrons under no geomagnetic disturbance |
publishDate |
1978 |
url |
https://nipr.repo.nii.ac.jp/record/903/files/KJ00000011876.pdf |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 9 11 23 AA00733561 https://nipr.repo.nii.ac.jp/record/903/files/KJ00000011876.pdf |
_version_ |
1809818048733904896 |