Computer Science
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..727s&link_type=abstract
In: Proceedings of the 9th International Symposium on Materials in a Space Environment, 16-20 June 2003, Noordwijk, The Netherla
Computer Science
Space Environment, Materials
Scientific paper
Theoretical as well as experimental studies of electron charging of polymer dielectrics have been conducted using the split Faraday cup technique. Monte-Carlo calculations of the depth distribution of the radiation driven current and the dose rate have been performed for monoenergetic electrons in 0.04-9 MeV energy range and also for the geosynchronous substorm electron spectrum (as obtained by SCATHA spacecraft). Spatial as well as temporal variations of the space charge density and the electric field strength have been found numerically in 1D approximation. Laboratory experiments consisted in irradiation of the polymer slab by 0.06-1 MeV single energy electrons at room temperature in vacuum. It has been shown that the asymptotic decay of the rear electrode current depends on the exponent in the power law dependence of the radiation induced conductivity on the dose rate ubiquitously encountered in polymers.
Milekhin Yu. M.
Sadovnichii D. N.
Tyutnev A. P.
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