Replaces Siemens Medical Solutions 10613748

L3 COLD HEAD (RDK408-L3)

The RDK-408D Cold Head is a two-stage GM cycle cryo-refrigerator. The function of the Cold Head is to produce continuous closed-cycle refrigeration at temperatures, depending upon the heat load imposed, in the range of 25K to 40K for the first-stage cold station and in the range of 3.5K to 4.2K for the secondstage cold station. The Cold Head has three major components: the drive unit; the cylinder; and the displacer-regenerator assembly, which is located inside the cylinder. With newly developed rare earth regenerator material and with very unique structure, the model RDK408D Cold Head has its 2nd stage refrigeration capacity of 1W at 4.2K. Functionally, the high-pressure helium gas from the Compressor Unit will be supplied to the Cold Head through the helium gas supply connector. The supply gas will be passed into the displacer-regenerator assembly, come out through the displacer-regenerator assembly to the crankcase through the motor housing and finally will be returned to the Compressor Unit through the helium gas return connector. The helium gas expansion in the displacer-regenerator assembly will be provided cooling condition for the first and second-stage cold stations.

The RDK-408D Cold Head is a two-stage GM cycle cryo-refrigerator. The function of the Cold Head is to produce continuous closed-cycle refrigeration at temperatures, depending upon the heat load imposed, in the range of 25K to 40K for the first-stage cold station and in the range of 3.5K to 4.2K for the secondstage cold station. The Cold Head has three major components: the drive unit; the cylinder; and the displacer-regenerator assembly, which is located inside the cylinder. With newly developed rare earth regenerator material and with very unique structure, the model RDK408D Cold Head has its 2nd stage refrigeration capacity of 1W at 4.2K. Functionally, the high-pressure helium gas from the Compressor Unit will be supplied to the Cold Head through the helium gas supply connector. The supply gas will be passed into the displacer-regenerator assembly, come out through the displacer-regenerator assembly to the crankcase through the motor housing and finally will be returned to the Compressor Unit through the helium gas return connector. The helium gas expansion in the displacer-regenerator assembly will be provided cooling condition for the first and second-stage cold stations.

• 8395860: Siemens Medical Solutions: Item Replacement