Mechanical Cooler and Cryostat for Submillimeter SIS Mixer Receiver in Space Junji Inatani, Teruhito Iida, Ryouta Satoh National Space Development Agency Katsuhiro Narasaki, Shoji Tsunematsu, Makoto Kyoya Sumitomo Heavy Industries, Ltd. Takeshi Manabe, Masumichi Seta Communications Research Laboratory Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing Signal Flow Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Superconductive Submillimeter Mixer SIS: Superconductor-Insulator-Superconductor 640 GHz SIS MIxer for SMILES Sensitivity of SIS Mixers Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Requirements on the Cooler Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing 4 K Mechanical Cooler Cooling to 100 K & 20 K: Two-stage Stirling Cooler Cooling to 4.5 K: Joule-Thomson Cooler Cooling Capacity: 20 mW @ 4.5 K 200 mW @ 20 K 1000 mW @ 100 K Power Consumption: 300 W @ 120 VDC Mass: Cooler 40 kg Cryostat 26 kg Electronics 24 kg Total 90 kg Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Two-stage Stirling Cycle Cooler Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Two-stage Stirling Cycle Cooler Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing Joule-Thomson Cooler Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Joule-Thomson Compressors Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing Cryostat Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Thermal Design of the Cryostat Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Thermal Capacity Measured (1/2) Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Thermal Capacity Measured (2/2) Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Lifetime Test of the J-T Cooler Sept. 1998 --- Dec. 1999 Operation: 9,315 hours Halt Halt Halt Halt Flow Rate / Power Flow Rate / Power Return Press. [kgf/cm2A] / Power [W] Flow Rate [NL/min] / Power [W] Flow Rate / Power Return Press. / Power Supply Press. [kgf/cm2A] / Power [W] Return Press. / P. Return Press. / P. Supply Press. / P. Supply Press. / Power Return Press. / P. Supply Press. / P. Supply Press. / P. Time [hours] Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
Change of Performance in the Test Period Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing System Integration SRX: Submillimeter Receiver SMILES: Superconducting Submillimeter-wave Limb-emission Sounder Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing
8th International Symposium on Remote Sensing Conclusions We have designed, built, and tested a space-qualified 4 K cooler for a 640 GHz SIS mixer receiver for SMILES. It is based on a two-stage Stirling cycle cooler and a Joule-Thomson cooler, both of which are integrated in a cryostat optimized for the receiver. The cooler has demonstrated a cooling capacity of 20 mW at 4.6 K, 200 mW at 21 K, and 1000 mW at 100K. The J-T cooler maintained its cold stage less than 5.0 K over 9,300 hours of real operation, although the cooling efficiency was gradually decreased. An improvement in the supporting structure of the pistons was tested and found promising. The temperature of the 4 K stage was 4.7-5.0 K. A modification of the connecting structure between the J-T orifice and the 4 K stage was tested and found useful to reduce the temperature. All of the experimental results are now fully utilized in the detail design of the PFM cooler for SMILES. Toulouse, Sept. 17-21, 2001 8th International Symposium on Remote Sensing