Utilization of the vacuum developed in the wake zone of space vehicles in the LDEF class

Autor:	R. J. Naumann, W. A. Oran
Rok vydání:	1977
Předmět:	Physics Spacecraft business.industry General Engineering Flux Wake Space (mathematics) Power (physics) Computational physics Altitude Classical mechanics Physics::Plasma Physics Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics Vacuum level business Short duration
Zdroj:	Journal of Vacuum Science and Technology. 14:1276-1278
ISSN:	0022-5355
DOI:	10.1116/1.569364
Popis:	Contaminating fluxes from upper atmospheric molecules found in the wake of a typical spacecraft of the Long Duration Exposure Facility class are studied with the aim of determining vacuum levels which may be employed by experiments mounted on the vehicle. A simplified representation for the spacecraft, the velocity-shifted Maxwellian distribution (to evaluate ambient flux which has a velocity sufficient to overtake the spacecraft), and a calculation for the backscattered contribution to the flux density of the wake figure in the study are presented. Results indicate that direct and backscattered fluxes of about 10 to the seventh power molecules per sq cm can be expected in the wake of a spacecraft at 550 km altitude.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f251ca92be46e0fe172bd4f77942f4a https://doi.org/10.1116/1.569364 Zobrazit plný text záznamu