Abstract SAFARI is an infrared instrument developed by a European based consortium to be flown in SPICA, a Japanese led mission. The SAFARI detectors are transition edge sensors (TES) and require temperatures down to 50 mK for their operation. For that purpose we have developed a hybrid architecture based on the combination of a 300 mK sorption stage and a small adiabatic demagnetization stage. An engineering model has been designed to provide net heat lifts of 0.4 and 14 μW respectively at 50 and 300 mK, with an overall cycle duration of 48 h and a duty cycle objective of over 75%. The cooler is self-contained, fits in a volume of 156 × 312 × 182 mm and is expected to weigh 5.1 kg. It has been designed to withstand static loads of 120 g and a random vibration level of 21 g RMS.
[1]
T. Nakagawa,et al.
Cryogenic system design of the next generation infrared space telescope SPICA
,
2010
.
[2]
Berend Winter,et al.
Improved performance of an engineering model cryogen free double adiabatic demagnetization refrigerator
,
2010
.
[3]
Lionel Duband,et al.
SPICA sub-Kelvin cryogenic chains
,
2012
.
[4]
K. Kanao,et al.
Development of double-stage ADR for future space missions
,
2010
.
[5]
Lionel Duband,et al.
Performances of the 50 mK ADR/sorption cooler
,
2012
.
[6]
Lionel Duband,et al.
Herschel flight models sorption coolers
,
2008
.
[7]
Peter Shirron,et al.
Development of a cryogen-free continuous ADR for the constellation-X mission
,
2004
.