Optimizing beam brightness at the Canadian Light Source

The Canadian Light Source (CLS) storage ring has been operating routinely since commissioning was completed in the spring of 2004. Since that time the storage ring parameters have been adjusted in efforts to increase the brightness of the source. This includes changes to the operating point, reducing the transverse coupling and optimizing the dispersion at the source points. Depending on the photon energy brightness and flux from the undulators are increased by reducing the beam size or reducing the emittance. This is achieved with higher tunes which both decrease the emittance and the vertical beta-function while increasing the horizontal beta- function. Dispersion at the undulators can be optimized to minimize the beam emittance or beam size. Vertical coupling can be adjusted to less than 0.1% by reducing both the vertical dispersion and transverse coupling or increasing the vertical tune. The performance of the IR beamlines has been enhanced by producing coherent THz radiation from short bunch lengths.