Our high-temperature superconducting undulator utilises top-quality RE-Ba-Cu-O bulks, created through Single Direction Melted Growth and precisely cut via EDM wire erosion. These bulks, embedded in copper discs, are arranged in a staggered structure to generate a powerful alternating undulator field. Holmium poles interposed between the discs enhance and finely tune the magnetic field, aiming at a phase error below one degree.

Operating at cryogenic temperatures around 10 K and magnetised by an external solenoid generating fields up to 10 T, the undulator is housed in an integrated cryostat for independent control of temperature and magnetic fields. An ultra-high vacuum chamber, essential for the high-energy electron beam, maintains low pressures and efficiently manages the thermal gradient from room temperature to 10 K.

Currently at Technology Readiness Level (TRL) 4, our undulator aims to reach TRL 6 within two years, following installation in the new Swiss Light Source storage ring, advancing the I-TOMCAT beamline for tomographic microscopy.