Utilization of bulk high-temperature superconductors for shorter-period synchrotron radiation sources

Abstract

A new application of high-temperature superconducting (HTS) bulk magnets to synchrotron radiation (SR) sources, i.e., magnetic devices that generate a periodic field to produce highly brilliant SR, is presented. Utilization of HTS bulk magnets brings two advantages over the existing SR sources: much stronger field than that of conventional SR sources with rare-earth permanent magnets (REPMs) and higher feasibility than existing superconducting SR sources with low-temperature superconducting coils. Two schemes for the application of HTS bulk magnets to SR sources are presented. In the first scheme, HTS bulk rings are mounted on REPMs to enhance the magnetic field. In the second one, HTS bulk magnets are arranged in line instead of REPMs. Principles and recent demonstration experiments are described.