NTRS - NASA Technical Reports Server

Back to Results
Measurements of heavy solar wind and higher energy solar particles during the Apollo 17 missionThe lunar surface cosmic ray experiment, consisting of sets of mica, glass, plastic, and metal foil detectors, was successfully deployed on the Apollo 17 mission. One set of detectors was exposed directly to sunlight and another set was placed in shade. Preliminary scanning of the mica detectors shows the expected registration of heavy solar wind ions in the sample exposed directly to the sun. The initial results indicate a depletion of very-heavy solar wind ions. The effect is probably not real but is caused by scanning inefficiencies. Despite the lack of any pronounced solar activity, energetic heavy particles with energies extending to 1 MeV/nucleon were observed. Equal track densities of approximately 6000 tracks/cm sq 0.5 microns in length were measured in mica samples exposed in both sunlight and shade.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Walker, R. M.
(Washington Univ. Saint Louis, MO, United States)
Zinner, E.
(Washington Univ. Saint Louis, MO, United States)
Maurette, M.
(Lab. Rene Bernas Orsay, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Publication Information
Publication: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.
Subject Category
Space Radiation
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available