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Observation of low energy protons in the geomagnetic tail at lunar distancesThree suprathermal ion detectors stationed on the moon were used to detect a region of plasma flowing antisunward along the ordered field lines of the geomagnetic tail, exterior to the plasma sheet. The particle flow displays an integral flux, a bulk velocity, temperatures, and number densities uniquely different from the other particle regimes traversed by the moon. No consistent deviation in the field was found to correspond with the occurrence of the events, which have an angular distribution extending between 50 and 100 deg and a spatial distribution over a wide region in both the Y sub sm and Z sub sm directions. The duration of observable particles varies widely between tail passages, with an apparent correlation between the number of hours of observation and the Kp index averages over these times. It is proposed that these particles may have entered through the cusp region.
Document ID
19750014179
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Hardy, D. A. (Rice Univ. Houston, TX, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1974
Subject Category
Space Radiation
Report/Patent Number
NASA-CR-141732
Accession Number
75N22251
Funding Number(s)
CONTRACT_GRANT: NAS9-5911
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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