Triton400

- Base temperature: 10 mK
- Cooling power at 100 mK: 575 μW
- Vector magnet: 6T-1T-1T
- Cryogen free, no liquid He4 required, cooled to ∼4K with Pulse Tube Refrigerator
- Fully automated operation
- Bottom loader provides with fast sample exchange without need to warm up the whole system to the room temperature
- Cooling time from room temperature to 10 mK:
° without magnet ∼24h
° with magnet ∼50h
° with fast loading ∼10h
- Wiring:
° 8 x microwave lines
° 12 x Thermocoax lines
° 6 x S1 coax lines
° 4 x shielded twisted pairs
° Loom of 12 twisted pairs of Cu wires
° Loom of 12 twisted pairs of Cu/Supercon wires
° Sample puck equipped with 14 SMP connectors and 51 pin DC Nanoconnector
- Temperature range:
° without magnet 10 mK – 300 K
° with magnet 10 mK - 30 K

Fig. 1.
Triton 400 suspended from the ceiling via antivibration frame. Inset shows a close-up of the bottom of the fridge – the load lock used for quick sample exchange.

Fig. 2.
Inside of the fridge revealing the mixing chamber (shiny silver pot) and the docking station for the fast sample loading. The docking station fits into bore of the magnet (see Fig.4).

Fig. 3.
The bottom view of the mixing plate shows variety of different types of connectors and docking station with 14 x SMP + 51 PIN DC connector terminals.

Fig. 4.
3axis vector magnet 6T-1T-1T mounted to 4K flange.

Fig. 5.
The sample puck (outer shield removed) mating with the docking station prepared for microwave measurements. It can be loaded into fridge while the fridge remains cold.

Fig. 6.
Disassembled microwave-compatible home-made sample holder fitting into the sample puck (Fig.5). It was designed and fabricated within a joint collaboration of IF PAN and PICO group of Aalto University (twinning partner in Eagle Project).

Fig. 7.
Recently measured on-chip microwave probed thermometers embedded in superconducting resonators.