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20K Stirling Cryocoolers

LB2ST is a two-stage Stirling cryocooler specialized for space. It can be used to cool heat shields and pre-cool JT circuits. Employing a special mechanism (patented) to achieve a long service life, this cryocooler was adopted by the X-ray astronomy satellite Hitomi (ASTRO-H) that was launched in 2016, and will be equipped on the X-Ray Imaging and Spectroscopy Mission scheduled to be launched in 2021.

Item Specifications Note
Method Two-stage Stirling cycle cryocooler Compressor, cold head split type
Cooling capacity Second stage 200mW at 20K
First stage 1000mW at 100K
After installation at 23℃
Environmental temperature -20 to 23℃
Power consumption 90W Excl. drive electronics
Service life > 3 years
Weight 9.5 kg Excl. drive electronics
Actual applications

Infrared astronomy satellite Akari (ASTRO-F)

SMILES (equipped on the International Space Station)

X-ray astronomy satellite Hitomi (ASTRO-H)

Planned launches

X-Ray Imaging and Spectroscopy Mission (XRISM)

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