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Proceedings Paper

Lockheed Martin two stage pulse tube cryocooler developments
Author(s): Ted C. Nast; D. Frank; E. Roth; P. Champagne; J. Olson; B. Evtimov; R. Clappier; T. Renna; B. Martin
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Paper Abstract

Lockheed Martin's Advanced Technology Center (LM-ATC) has delivered a flight model cryocooler system for NASA's Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS). This system was developed as a New Millennium Program to demonstrate technologies, which enable revolutionary science. One of the new technologies for future generation remote sensors is the two-stage pulse tube cryocooler. This cooler is presently being integrated with the spectrometer at Space Dynamics Laboratory (SDL) in preparation for system tests. In addition, a similar two-stage Engineering Model cryocooler was developed for a different program. LM-ATC's pulse tube cryocoolers employ a unique staging arrangement, resulting in high power efficiency, compact and efficient packaging, and interfacing and excellent reliability. They are robust and simple, consisting of a two-stage coldhead with no moving parts, driven by a moving magnet 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. These two stage cryocoolers are developed for simultaneous cooling of the focal plane and the optics at two different temperatures. The electronic controller provides precise temperature control of the focal plane and also provides a vibration reduction loop. The total mass of these systems, including electronics, is approximately 9 Kg. This paper presents the performance and characteristics of these systems.

Paper Details

Date Published: 25 August 2005
PDF: 7 pages
Proc. SPIE 5904, Cryogenic Optical Systems and Instruments XI, 590411 (25 August 2005); doi: 10.1117/12.623360
Show Author Affiliations
Ted C. Nast, Lockheed Martin Advanced Technology Ctr. (United States)
D. Frank, Lockheed Martin Advanced Technology Ctr. (United States)
E. Roth, Lockheed Martin Advanced Technology Ctr. (United States)
P. Champagne, Lockheed Martin Advanced Technology Ctr. (United States)
J. Olson, Lockheed Martin Advanced Technology Ctr. (United States)
B. Evtimov, Lockheed Martin Advanced Technology Ctr. (United States)
R. Clappier, Lockheed Martin Advanced Technology Ctr. (United States)
T. Renna, Lockheed Martin Commercial Space Systems (United States)
B. Martin, Lockheed Martin Commercial Space Systems (United States)


Published in SPIE Proceedings Vol. 5904:
Cryogenic Optical Systems and Instruments XI
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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