文档介绍：Wide-field Infrared Survey Explorer cryogenic support system status
and thermal test results
Scott Schick1 and Brett Lloyd2
1Practical Technology Solutions, Inc. North Logan, Utah 84341, USA
2Space Dynamics Laboratory North Logan, Utah 84341, USA
ABSTRACT
The Wide-Field Infrared Survey Explorer (WISE) is a MIDEX mission that is being developed by the Jet Propulsion
Laboratory (JPL) to address several of NASA’s Astronomical Search of Origins (ASO) objectives. Space Dynamics
Laboratory/ Utah State University is providing the cryogenically cooled infrared instrument. Cooling for the instrument
optics and focal planes is provided by a dual-stage solid hydrogen cryostat. Driving requirements for the cryogenic
subsystem are: a seven-month lifetime and operating temperatures of less than 17 K for the optics, 32 K for the HgCdTe
focal planes, and K for the Si:As focal planes. This paper provides an overview of the dual-stage hydrogen cryogenic
subsystem status and discusses the results of the thermal performance testing.
Keywords: Cryogenic cooling, solid hydrogen, cryostat, thermal, WISE
1. INTRODUCTION
The Wide-field Infrared Survey Explorer (WISE) mission is a NASA medium explorer project (MIDEX) being
developed with the Jet Propulsion Laboratory (JPL). The primary goal of WISE is to provide an all-sky survey in four
infrared imaging chann