Compensation of Linear Optical Parameters With Superconducting Wiggler Magnet in Hefei Light Source

Hefei light source(HLS) is a dedicated VUV light source. A superconducting (SC) wiggler magnet with peak magnetic field of 6 T was installed in the storage ring in order to extend usable synchrotron radiation spectrum to hard X-ray. The SC wiggler brought a large perturbation to optical parameters of the storage ring, including tune shift and β function distortion. At early days, after tune compensation with SC wiggler, beam was successfully stored with a short beam lifetime. In phase Ⅱ project of HLS, the lattice parameters were adjusted to compensate tune shift and β function distortion, then the beam lifetime was improved significantly.