A Variety of Tools

TOP LEFT: 3He-4He dilution refrigerator for cooling high pressure cells to millikelvin temperatures.
TOP RIGHT: Diamond anvil cell for achieving pressures up to several megabar.
BOTTOM LEFT: “Designer” diamond anvils with electrodes for electrical resistivity and Hall effect measurements (LEFT) and spiral coil for ac magnetic susceptibility measurements (RIGHT) under high pressure.
BOTTOM RIGHT: Inductance coils for piston-cylinder high pressure cells for ac magnetic susceptibility measurements under pressure.