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  • 1970-1974  (7)
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  • 1
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    Electric potential of the Moon in the solar wind (1973)
    American Geophysical Union
    Details
    Publication Date: 1973-08-01
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
    Published by American Geophysical Union
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    PAPER CURRENT
  • 2
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    Electric potential of the moon in the solar wind. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Acceleration and detection of the lunar thermal ionosphere in the presence of the lunar electric field yields a value of at least +10 V for the lunar electric potential for solar zenith angles between approximately 20 and 45 deg and in the magnetosheath or solar wind. An enhanced positive ion flux is observed with the Apollo Lunar Surface Experiments Package Suprathermal Ion Detector Experiment when a preacceleration voltage attains certain values. This enhancement is greater when the moon is in the solar wind as opposed to the magnetosheath.
    Keywords: SPACE SCIENCES
    Type: Journal of Geophysical Research; 78; Aug. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Suprathermal ions near the moon. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: This paper reports some preliminary results from the suprathermal ion detectors deployed on the lunar surface by the Apollo 12 and 14 astronauts. Salient features of these results include: the possible observation of sporadic venting of gas from the lunar surface; evidence for a prompt ionization and acceleration mechanism operating in the lunar exosphere; and a preliminary measurement yielding approximately 1 month for the e-folding decay time for the heavier components of the exhaust gases from the Apollo lunar landing systems. Prominent phenomena from which these results have been derived are: (1) ion bursts of low to moderate energy seen in conjunction with lunar sunrise and sunset; (2) solar wind energy ions detected on the night side of the moon; (3) ions of several keV energy seen during the lunar sunset to midnight quadrant of the moon's orbit; (4) magnetosheath ion flux enhancements; (5) ion bursts generated by the lunar impact of the Apollo 13 Saturn upper stage; and (6) geomagnetic storm associated ion flux variations in the earth's magnetotail.
    Keywords: SPACE RADIATION
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Plasma-sheet ions at lunar distance preceding substorm onset. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: During the partial lunar eclipse of August 17, 1970, four intense, transient bursts of kV-energy positive ions were detected at the lunar surface by the Rice University ALSEP Suprathermal Ion Detector Experiment. The eclipse happened to occur during a main-phase geomagnetic storm while the moon was within a few earth radii of the calculated position of the neutral sheet. The two most intense ion bursts were each followed roughly one-half hour later by the sudden onset of a several thousand gamma polar magnetic substorm at the earth's surface. Two smaller ion enhancements were also followed by smaller magnetic disturbances. This observation is interpreted in terms of a downstream escape of plasma-sheet particles associated with the substorm growth phase.
    Keywords: SPACE SCIENCES
    Type: Planetary and Space Science; 19; Nov. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    The electric potential of the moon in the solar wind (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Acceleration and detection of the lunar thermal ionosphere in the presence of the lunar electric field yields a value of approximately +10 V for the lunar electric potential for solar zenith angles between 20 and 45 deg and in the magnetosheath or solar wind. The ion number density of the thermal ionosphere observed is compatible with a surface neutral number density of about 100,000 atoms/cu cm.
    Keywords: SPACE SCIENCES
    Type: ESLAB Symposium; Sep 26, 1972 - Sep 29, 1972; Noordwijk; Netherlands
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The electric potential of the lunar surface (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Acceleration and detection of the lunar thermal ionosphere in the presence of the lunar electric field yields a value of at least +10 V for the lunar electric potential for solar zenith angles between approximately 20 and 45 deg and in the magnetosheath or solar wind. An enhanced positive ion flux is observed with the ALSEP Suprathermal Ion Detector when a pre-acceleration voltage attains certain values. This enhancement is greater when the moon is in the solar wind as opposed to the magnetosheath.
    Keywords: SPACE SCIENCES
    Type: Lunar Science Conference; Mar 05, 1973 - Mar 08, 1973; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Some results from the Apollo 12 suprathermal ion detector (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Apollo 12 suprathermal ion detector data, considering Apollo 13 S-IVB stage impact
    Keywords: SPACE SCIENCES
    Type: LUNAR SCIENCE CONFERENCE; Jan 11, 1971 - Jan 14, 1971; HOUSTON, TX
    Format: text
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    NASA TECHNICAL REPORTS
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