PreparingDIL

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 CAF seal (red silicon paste) with clean fingers
• put the tube, turning it a little on the seal and start pumping with the leak detector.
• leak check
• put the stick into the Variox or magnet VTI.
• insert about 50 mbar 4He into the IVC
• take the special assembly to connect the pumping line and the condenser line with the stick
• pump out the adapter piece
• connect a turbo pump to the IVC, start te pump, but do not yet open the IVC valve.

The following steps can be done automatically in SEA, under "main diltuion control"

• ("cool") cool down the heat exchanger of the variox or magnet
• When the stick is cold (< 4K, ins SEA "readyforpump") pump the IVC by clicking on "sorbpump" and opening the IVC valve, which is already connected to a running turbo pump. This heats up the VTI to 5 K, which might take a while. After 20 min. with sorb temperature set to 40 K, then 15 min without sorb heater, the "condense" step starts automatically.