A cryogenic heat transfer system including a platen supported by a rotatable shaft, a housing surrounding a portion of the rotatable shaft, the housing including an annular heat sink surrounding the rotatable shaft and defining a heat transfer gap between the heat sink and the rotatable shaft, the heat sink including a fluid conduit extending therethrough for circulating a first cooling fluid through the heat sink, a first dynamic seal arrangement extending from a first axial end of the heat sink and surrounding the rotatable shaft, and a second dynamic seal arrangement extending from a second axial end of the heat sink opposite the first axial end and radially surrounding the rotatable shaft, wherein the heat sink and the first and second dynamic seal arrangements define a fluidically sealed volume surrounding the rotatable shaft, the fluidically sealed volume containing a second cooling fluid.