Cryogenics

3He/4He Sorption Fridge (Lionel Duband, CEA): 

• Precools grating to ~400 mK
• Intercepts heat load from wires & 4.2  K radiation

Adiabatic Demagnetization Refrigerator:

• Cools Grating and Detectors to 100 mK
• Automated
• No Pumping on ⁴He Bath
• Hold Time > 1 Day