Survey of DSCS-III B-7 differential surface charging

Autor:	Gabriel Font, K.P. Ray, C. L. Enloe, Matthew G. McHarg, D.L. Cooke, V. B. Putz, M.J. Toth, L.H. Krause
Rok vydání:	2004
Předmět:	Physics Nuclear and High Energy Physics Solar maximum Electric charge Charged particle Kapton Computational physics Solar cycle Spacecraft charging Plasma contactor Nuclear Energy and Engineering Electrical and Electronic Engineering Voltage Remote sensing
Zdroj:	IEEE Transactions on Nuclear Science. 51:3399-3407
ISSN:	1558-1578 0018-9499
DOI:	10.1109/tns.2004.840838
Popis:	An analysis of differential charging between dielectric surface materials and the frame of a DSCS-III geosynchronous spacecraft is presented. Charging levels measured by surface potential monitors (SPMs) covered with samples of Kapton and Astroquartz have been recorded for one half of a solar cycle. Both seasonal and solar cycle effects are seen in the daily peak levels of the SPM voltages, with local maxima occurring near the equinoxes and a general trend increasing as solar max is approached. Charge neutralization by an onboard Xe plasma contactor was demonstrated to be effective throughout the mission, with a mean voltage reduction of 86% for Astroquartz and 74% for Kapton. Though a statistical analysis shows a general correlation between the fluence of charging electrons with SPM voltages, the event-specific correlation contains enough variance to cast doubt on the usefulness of an electron sensor as a differential charging alarm. We have found that a Kapton-covered SPM may be better suited than an electron sensor as a differential charging alarm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::45a959701cfd13bb3e79d80cfeb9173c https://doi.org/10.1109/tns.2004.840838 Zobrazit plný text záznamu