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Wide Dynamic Range Porous Plug for SIRTF

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dc.contributor.author Petrac, D. en_US
dc.contributor.author Nakano, N. en_US
dc.date.accessioned 2004-10-03T04:19:56Z
dc.date.available 2004-10-03T04:19:56Z
dc.date.issued 1995-07-17
dc.identifier.citation Cryogenic Engineering Conferences, Columbus, Ohio, July 17-21, 1995 en_US
dc.identifier.citation en_US
dc.identifier.clearanceno 95-1033
dc.identifier.uri http://hdl.handle.net/2014/31174
dc.description.abstract The most recent approach to the Space Infrared Telescope Facility (SIRTF) uses a new design concept in which the telescope is launched warm and subsequently cooled to operating temperature on orbit. At launch, the cryostat is at 2 K and the telescope is at room temperature. Cooldown of the telescope will be accomplished initially through radiation to space. Final cooldown to the 5.5 K operating temperature is done with helium vapor. Initially, the helium flow on orbit will be 20 to 30 times larger than required for steady-state operation. The vent line and the liquid/vapor phase separator (porous plug) therefore must accommodate a large dynamic operational range.For ground testing of IR instruments, the required temperature is 1.5 K. The helium tank temperature for both ground testing and space operations thus needs to be at 1.4 K. We present a discussion of the requirements, a conceptual design, and initial laboratory test results with candidate porous plugs and associated instrumentation. A discussion of possible connections to the design of the Gravity Probe-B cryostat will be presented also. en_US
dc.format.extent 370040 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other SIRTF, Liquid/Vapor Phase, Separator, Porous Plug en_US
dc.title Wide Dynamic Range Porous Plug for SIRTF en_US


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