Thermal and mechanical analyses on a vacuum chamber in a compact superconducting undulator with HTS tapes

Superconducting (SC) undulators composed of high-temperature superconducting (HTS) tapes, which can be applied to compact light sources such as a table-top free-electron laser, are a part of research and development projects at Karlsruhe Institute of Technology (KIT). In order to minimize the beam heat loads in a cryostat including the compact SC planar undulator, a vacuum chamber (liner) positioned in the undulator gap is considered. In this study, we discuss the preliminary cryostat design based on a simple cooling concept with a cryocooler and report thermal and mechanical simulation results with the liner at cryogenic temperature.