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Proceedings Paper

Pinhole imaging of small-scale auroral x-ray structures
Author(s): George K. Parks; Theodore Freeman; Michael McCarthy; Scott H. Werden
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Paper Abstract

Our group has developed a pinhole Anger camera to detect and image auroral X-rays in the energy range 20 - 120 keV. We have flow this camera on four different occasions and have imaged auroral zone X-rays from dawn, dusk, and noon. The fourth flight was from a circum polar navigating balloon from Antarctica. Our data, which sampled a small number of the dynamic auroral precipitation temporal forms, show that auroral X-rays persistently include small spatial structures of approximately equals 20 km (at ionospheric heights). Our camera obtained energy spectral information as a function of space and time and shows that precipitation includes at least two energy components, one with an e-folding energy of a few keV and another with an e-folding energy of tens of keV. These X-ray images 'remote sense' the distant magnetospheric sources and indicate that there are at least two different source populations.

Paper Details

Date Published: 1 June 1992
PDF: 8 pages
Proc. SPIE 1744, Instrumentation for Magnetospheric Imagery, (1 June 1992); doi: 10.1117/12.60592
Show Author Affiliations
George K. Parks, Univ. of Washington (United States)
Theodore Freeman, Univ. of Washington (United States)
Michael McCarthy, Univ. of Washington (United States)
Scott H. Werden, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 1744:
Instrumentation for Magnetospheric Imagery
Supriya Chakrabarti, Editor(s)

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