Abstract Lockheed Martin’s Advanced Technology Center (LM-ATC) is developing the cryocooler system for the Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS). This is a NASA New Millennium Program (NMP) Earth Observing-3 mission to demonstrate revolutionary science enabling technologies. One of the new technologies for future generation remote sensors is the two-stage pulse tube cryocooler. Lockheed Martin is presently fabricating two cryocooler flight models, which includes the cryocooler and electronic controller. LM-ATC’s cryocooler approach employs a unique staging arrangement, which results in high power efficiency, compact, efficient packaging and interfacing and excellent reliability. It is robust and simple, consisting of a two-stage coldhead with no moving parts, driven by a linear flexure-bearing compressor and powered by a high-efficiency electronic controller that includes ripple suppression and vibration cancellation. The design is a “split” system in which the compressor and cold head are separated by a transfer line. The approach allows on orbit adjustment of the relative cooling loads and temperatures of the two stages. The controller provides precise temperature control at 55K. The cryocooler is designed to simultaneously provide cooling of 1.5 W at 55 K and 8 W at 140 K while rejecting heat at 300 K. Total system power is projected to be 150 W, and the exported vibration is expected to be less than 0.2 N. This paper presents the status of the flight model and overall system characteristics.
Lockheed Martin Two-Stage Pulse Tube Cryocooler for GIFTS
Cryocoolers 13 ; 121-126
2005-01-01
6 pages
Article/Chapter (Book)
Electronic Resource
English
Lockheed Martin Two-Stage Pulse Tube Cryocooler for GIFTS
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