
Option 1: The entire CRC cryocooler will sit inside the cryostat's 4K radiation shield, fixed to the 4K plate.
This means that the 'hot' pumps of the CRC cryocooler will require radiation shielding. The radiation shield can be designed to mechanically support the cryocooler, or, as in this picture, mechanical and thermal interfacing can be separated.
In this configuration the electrical connector to the CRC cryocooler will be on the 'cold' side of the cryocooler's mainplate.