Cryogen-free dilution refrigerator equipped with DC and RF wiring, circulators, and HEMT RF amplifiers

Main characteristics:
• Base temperature: approximately 15 mK (with all presently installed wiring)
• Mixing chamber cooling power at 100 mK: 250 uW
• Cooling power at 4.2K: >0.5 W
• Cooldown time to base temperature: more than 24 hours
Measurement Circuitry:

• 2 independent sample holders for rf transmission measurements in an approximately 100 MHz bandwidth centered at 600 MHz

• 2 coaxial high frequency output lines with SMA connectors, with superconducting Nb or NbTi cables, circulators, and HEMT amplifiers at the 4 K flange. Measurement bandwidth approximately 100 MHz centered at 600 MHz
• up to 6 coaxial input lines up to 18 GHz as well as DC-bias lines

• each sample holder equipped with In-shielding against stray microwaves, and up to 12 Thermocoax-filtered DC lines
• 600 MHz Josephson Parametric Amplifier at the mixing chamber flange

• Primary Coulomb Blockade Thermometer (CBT) thermalized to the mixing chamber flange