Found this during “lab clean up”. I almost threw it away, but I realized this is part of my science heritage from before I started working here. Let me see if I can explain what you’re looking at.
Start at the bottom and look at the reflective squares. Those are silicon chips made in the clean room with a few layers of patterned aluminum to create a tunnel junction refrigerator (basically what I did my phd work on). The refrigerator only works when the aluminum is superconducting, so it need to be at sub-Kelivin temperature, so this whole thing will be bolted into a cryostat. Now look at the first grey horizontal part, and look for the sets of 6 copper colored leads. This is to make electrical connection to the refrigerators with wire bonds. For these devices we typically measure IV curves, which just means you set the current, measure the voltage, and repeat.
Next up is another horizontal grey piece. You can see a row of gold colored holes on both grey pieces. I think this was used to route and reroute electrical signals by putting a wire one upper circle and one lower circle.
Next up is a bent brown sheet. This is a thin insulator with copper on the back, and copper traces on the front. I think it was for heat sinking. You know how even if your house is 80 degrees, water from outside can still be cold? This is the same idea, even though the whole platform is at .1 Kelvin, the electrons coming down the wires can still be way hotter, this is an attempt to cool them down before they get to the sensitive device being measured.
Finally the thing in the top right is a connector. It just connects to a bundle of wires in the cryostat that are accessible at room temperature.
Our sample boxes look way nicer these days, they’re easier to use. But basically they have the same goal as this.