Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1987-03-01 |
タイトル |
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言語 |
en |
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タイトル |
A balloon observation of auroral X-ray images in the northern auroral zone |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Hirasima, Yo
Murakami, Hiroyuki
Nakamoto, Atsushi
Okudaira, Kiyoaki
Suzuki, Hiromu
Yamagami, Takamasa
Ohta, Shigeo
Namiki, Michiyoshi
Nishimura, Jun
Miyaoka, Hiroshi
Sato, Natsuo
Fujii, Ryoichi
Kodama, Masahiro
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著者所属(英) |
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en |
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Department of Physics, Rikkyo University/Department of Physics, Rikkyo University/Department of Physics, Rikkyo University/Department of Physics, Rikkyo University/Department of Physics, Rikkyo University/The Institute of Space and Astronautical Science/The Institute of Space and Astronautical Science/The Institute of Space and Astronautical Science/The Institute of Space and Astronautical Science/National Institute of Polar Research/National Institute of Polar Research/National Institute of Polar Research/Department of Physics, Yamanashi Medical College |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
A balloon observation of auroral X-rays has been carried out by using two kinds of X-ray imagers, i.e., a newly developed imager with 5×5 matrix array of Si(Li) semiconductor detectors (SSD's) and another one with one-dimen-sional array of 8 NaI (Tl) scintillation counters. Each of these two imagers has a pinhole collimator, which gives a resolution angle of 15°at the central detector (counter). The lower limits of X-ray energy measurable are 37 and 22keV for the SSD and NaI(Tl) imagers, respectively. The balloon carrying these imagers was launched from Abelver, Norway at 2117 UT on July 5,1985 and was flown toward lceland. An enhancement of auroral X-ray flux was observed in the location of L=5.2 at ∿ 2334 MLT near the geomagnetic midnight, during a geomagnetic substorm. Temporal variation of two-dimensional auroral X-ray images was derived with 3 s time resolution from SSD imager data. Also, another imager of NaI(Tl) counters confirmed the SSD results. It is shown that a sequence of auroral X-ray images obtained by two imagers are not like a stable arc structure but a localized structure with a rapid time variation. The present results suggest that localized intermittent precipitations of energetic electrons with several tens keV or greater are possible. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 47,
p. 44-55,
発行日 1987-03
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