NDLI: Analysis of leam experiment response to charged particles

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Analysis of leam experiment response to charged particles

Content Provider	NASA Technical Reports Server (NTRS)
Author	Perkins, D.
Copyright Year	1976
Description	The objectives of the Lunar Ejecta and Meteorites Experiment (LEAM) were to measure the long-term variations in cosmic dust influx rates and the extent and nature of the lunar ejecta. While analyzing these characteristics in the data, it was discovered that a majority of the events could not be associated with hypervelocity particle impacts of the type usually identified with cosmic dust, but could only be correlated with the lunar surface and local sun angle. The possibility that charged particles could be incident on the sensors led to an analysis of the electronics to determine if such signals could cause the large pulse height analysis (PHA) signals. A qualitative analysis of the PHA circuit showed that an alternative mode of operation existed if the input signal were composed of pulses with pulse durations very long compared to the durations for which it was designed. This alternative mode would give large PHA outputs even though the actual input amplitudes were small. This revelation led to the examination of the sensor and its response to charged particles to determine the type of signals that could be expected.
File Size	5020376
Page Count	143
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19760026024
Archival Resource Key	ark:/13960/t88h3dd23
Language	English
Publisher Date	1976-10-04
Access Restriction	Open
Subject Keyword	Lunar And Planetary Exploration Pulse Duration Meteoritic Damage Meteorites Cosmic Dust Signals Lunar Surface Charged Particles Hypervelocity Impact Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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