Inside the cryostat
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In this part, you will see more details inside the cryostat. It's the most critical part of the dilution refrigerator, also the most complicated part.
The refrigerator. On the left is the controling assembly, with gauges and valves to adjust the gas flow. The big diffusion pump inside the control box pumps out Helium 3 from the mixture. On the left side, is the cryostat, now without the outer black vacuum shield (where is it?).
A complicated look. The cylinder on the bottom contains the superconductor magnet. Above it, there are lots of tubes and radiation shields. Because during the operation, the whole part is immersed inside liquid Helium, surely we do not want much heat to go in.
The magnet top. The coil is lambda plate and pumping it will further reduce the magnet temperature thus permitting higher magnetic field.
Magnet quench protection circuits. So many wires! The shinning cylinder is IVC (inner vacuum chamber), which contains the dilution units.