NDLI: Jwst isim harness thermal evaluation

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Jwst isim harness thermal evaluation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Martins, Mario Ruppel, Sean Kobel, Mark Tuttle, Jim Glazer, Stuart
Copyright Year	2008
Description	The James Webb Space Telescope (JWST) will be a large infrared telescope with a 6.5-meter primary mirror. Launch is planned for 2013. JWST wl1 be the premier observatory of the next decade serving thousands of astronomers worldwide. The Integrated Science Instrument Module (ISIM) is the unit that will house thc four main JWST instruments. The ISIM enclosure passively cooled to 37 Kelvin and has a tightly managed thermal budget. A significant portion of the ISIM heat load is due to parasitic heat gains from the instrument harnesses. These harnesses provide a thermal path from the Instrument Electronics Control (IEC) to the ISIM. Because of the impact of this load to the ISIM thermal design, understanding the harness parasitic heat gains is critical. To this effect, a thermal test program has been conducted in order to characterize these parasitic loads and verify harness thermal models. Recent parasitic heat loads tests resulted in the addition of a dedicated multiple stage harness radiator. In order for the radiator to efficiently reject heat from the harness, effective thermal contact conductance values for multiple harnesses had to be determined. This presentation will describe the details and the results of this test program.
File Size	1242703
Page Count	19
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20080032910
Archival Resource Key	ark:/13960/t3c015d77
Language	English
Publisher Date	2008-03-11
Access Restriction	Open
Subject Keyword	James Webb Space Telescope Observatories Infrared Telescopes High Temperature Tests Thermal Conductivity Mirrors Loads Forces Harnesses Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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