Superconducting undulator cryogenic system based on indirect cooling

The indirect cooling cryogenic system of the superconducting undulator with 15.6 mm period and 8 mm magnetic gap is described in this article. Nitrogen heat pipes are used in this system to accelerate cooling down process. The cooling down without liquid helium was tested (only helium gas was used). The cryogenic system design is described and process of cooling down is presented.