Diamond anvil cells produce the pressure, however, here, the temperature is created by lasers. If you are careful enough (and reasonable enough), your diamond a

Diamond anvil cells produce the pressure, however, here, the temperature is created by lasers. If you are careful enough (and reasonable enough), your diamond anvil cell can last forever, as long as you don't break the diamonds you can reuse the same cell for another sample or another run. The pressure usually requires a pressure driver to push the diamonds towards each other (some kind of very precise gas pump) which runs of of electricity. The temperature however evolves rapidly: the sample is heated via laser (usually pulsed to observe dynamics but can also be considered continuous, i.e. above millisecond time scale).