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80K Stirling Cryocoolers

FS1ST is a lightweight, single-stage Stirling cryocooler with long service life and specialized for the space environment. This cryocooler is ideal for cooling detectors and heat shields.

Item Specifications Note
Method Single-stage Stirling cycle cryocooler Compressor, cold head split type
Cooling capacity 2W at 77 K After installation at 23℃
Environmental temperature -20 to 23℃
Power consumption 55W Excl. drive electronics
Service life > 5 years
Weight 5.0 ± 0.3 kg Excl. drive electronics
Capillary tube 250 mm (max.) Bending radius is over R9.5. Can be bent 90° within 3 times.
Hyper spectrum sensor (equipped on the International Space Station)
Actual applications on satellite orbits

X-ray astronomy satellite Suzaku (ASTRO-E2)

Lunar probe Kaguya (SELENE)

Venus probe Akatsuki (PLANET-C)

X-ray astronomy satellite Hitomi (ASTRO-H)

Climate change observation satellite Shikisai (GCOM-C)

Hyper spectrum sensor (equipped on the International Space Station)

Planned launches

Dual wavelength infrared sensor for satellites (equipped on ALOS-3)

X-Ray Imaging and Spectroscopy Mission (XRISM)

Cryocooler drive power supply
Item Specifications Note
Input 29 to 55V  
Output Compressor drive output
Balancer drive output
Compressor maximum output 55W
Measurement control Temperature measurement at 2 locations
Temperature control heater 0.7W
Temperature control accuracy ± 0.1K
Environmental temperature -30 to 60℃  
Power consumption Under 95W  
Weight 6.9 kg  
Telemetry, command interface RS422  

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