...
Cooling power of the He-evaporation refrigerator is 1.4 W at 1 K assuming a flow rate of 20 SLPM (normal operation). The pumps and fridge are capable of running twice this and staying at still around 1.1 K so a max cooling power while running is around 2.5 W conservatively speaking.
This is the highest cooling power DNP (Dymanic Nuclear Polarization) target in the world due the the high pumping rate and the refrigerator. This is important since we are attempting to run the highest proton intensity on a polarized target ever done.
This is also the highest proton intensity ever attempted on this type of superconducting target magnet.