Preparing the Kelvinox Dilution and Gas Handling System

• pump the traps (heat out each for 30 min, but pump longer)
• pump out the condenser and pumping line, on the gas handling system and on the stick (all volumes might be connected)

After some hours (or one night)

• make the seal with clean fingers (a thick layer on the stick, only a small amount inside the aluminium tube)
• put the tube, turning it a little on the seal and start pumping with the leak detector.
• leak check
• put into LN2 for precooling, put a small amount of He (1 mbar or less) into the IVC.
• if there is no hurry and the sample must be cooled slowly, the stick might be put directly into the cryostat (without LN2 precooling).

• cool down the heat exchanger of the variox or magnet (setpoint 5 K)
• pump the IVC (15 min. with sorb temperature set to 40 K, then 1 h without sorb heater)
• test if the temperature of the mixing chamber is no longer coupled to the heat exchanger (changing the setpoint to 6 or 7 K).

• if not yet done, take the special assembly to connect the pumping line and the condenser line with the stick
• pump out the adapter piece