TAILWARD FLOWING ENERGETIC OXYGEN-ION BURSTS ASSOCIATED WITH MULTIPLE   FLUX ROPES IN THE DISTANT MAGNETOTAIL - GEOTAIL OBSERVATIONS

doi:10.1029/95GL02980

CORC > 北京大学 > 地球与空间科学学院

	TAILWARD FLOWING ENERGETIC OXYGEN-ION BURSTS ASSOCIATED WITH MULTIPLE FLUX ROPES IN THE DISTANT MAGNETOTAIL - GEOTAIL OBSERVATIONS
	WILKEN, B ; ZONG, QG ; DAGLIS, IA ; DOKE, T ; LIVI, S ; MAEZAWA, K ; PU, ZY ; ULLALAND, S ; YAMAMOTO, T
刊名	geophysical research letters
	1995
关键词	PLASMA SHEET
DOI	10.1029/95GL02980
英文摘要	An event of tailward flowing energetic (144 - 7959 keV) oxygen ion bursts was observed in the distant magnetotail (X = -63, Y = +7, Z = -3.8 R(E)) on February 13, 1994. The observations were made with the HEP-LD spectrometer oil board the GEOTAIL spacecraft. The event was associated with magnetic field signatures characteristic of multiple flux ropes. During the event, which lasted from 1847 to 1907 UT, strong impulsive increases in the oxygen flux were observed. From 1846 to 1900 UT the proton counting rate also exhibited an increase, followed by a decrease until the end of the oxygen event. The oxygen flux was confined to a rather narrow range in polar and azimuthal angle (only 7 - 10% of 4 pi was occupied). This implies a streaming distribution or beam-like structure. Comparison of the particle flow angles with the polar and azimuthal angles of the magnetic field indicates that the ion beam may have been embedded in flux ropes, which may be connecting the polar ionosphere and the distant magnetotail. During the observed oxygen event the ratio N-O/N-H+ is significantly higher than the ratios usually found in the center of the distant magnetotail. There is some evidence that the observed oxygen ions were more efficiently accelerated in this event than hydrogen and helium ions.; Geosciences, Multidisciplinary; SCI(E); 27; ARTICLE; 23; 3267-3270; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/402854]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	WILKEN, B,ZONG, QG,DAGLIS, IA,et al. TAILWARD FLOWING ENERGETIC OXYGEN-ION BURSTS ASSOCIATED WITH MULTIPLE FLUX ROPES IN THE DISTANT MAGNETOTAIL - GEOTAIL OBSERVATIONS[J]. geophysical research letters,1995.
APA	WILKEN, B.,ZONG, QG.,DAGLIS, IA.,DOKE, T.,LIVI, S.,...&YAMAMOTO, T.(1995).TAILWARD FLOWING ENERGETIC OXYGEN-ION BURSTS ASSOCIATED WITH MULTIPLE FLUX ROPES IN THE DISTANT MAGNETOTAIL - GEOTAIL OBSERVATIONS.geophysical research letters.
MLA	WILKEN, B,et al."TAILWARD FLOWING ENERGETIC OXYGEN-ION BURSTS ASSOCIATED WITH MULTIPLE FLUX ROPES IN THE DISTANT MAGNETOTAIL - GEOTAIL OBSERVATIONS".geophysical research letters (1995).