An overview of the insertion device development at SRRC

Five high performance insertion devices, namely W20, U10, U5, U9 and EPU5.6 , have been constructed and installed in the storage ring of the Synchrotro n Radiation Research Center (SRRC). Among them, the 2-m-long conventional u ndulator U10 and the 4-m-long elliptically polarized undulator EPU5.6 were designed and built in-house. These two devices have achieved high magnetic field quality and high spectral performance. To facilitate hard-X-ray exper iments, the project of building a superconducting wavelength shifter (SWLS) and a superconducting multi-pole wiggler (SMPW) is ongoing. These two supe rconducting insertion devices were designed to be cryogen-free. (C) 2001 El sevier Science B.V. All rights reserved.