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Two high resolution velocity vector analyzers for cosmic dust particlesMethods are described to measure velocities and angles of incidence of charged cosmic dust particles with precisions of about 1 percent and 1 degree, respectively. Both methods employ four one-dimensional position-sensitive detectors in series. The first method utilizes a charge-dividing technique while the second utilizes a time-of-flight technique for determining the position of a particle inside the instrument. The velocity vectors are measured although mechanical interaction between the particle and the instrument is completely avoided. Applications to cosmic dust composition and collection experiments are discussed. The range of radii of measurable particles is from about 0.01 to 100 microns at velocities from 1 to 80 km/s.
Document ID
19740024129
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Aver, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
August 1, 1974
Subject Category
Space Radiation
Report/Patent Number
X-672-74-226
NASA-TM-X-70727
Accession Number
74N32242
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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