Note: A simple system for low-temperature experiments in a large-volume multi-anvil press.

A simple cooling system for a 3000-ton multi-anvil press was developed for temperatures below room temperature at high pressures. It is much simpler in design, easier to make and use, and has the same cooling capability as the previous design. The new system uses a steel ring surrounding the module wedges, which contains liquid nitrogen (LN2) that flows freely through a port to flood the interior of the pressure module. O-rings on the steel ring seal in LN2 while permitting compression. Two different cooling systems reach ∼220 K which suggests that thermal equilibrium for this press is reached between the removal and influx of heat.