Operation of a low emittance lattice at the NSLS X-Ray Ring

The NSLS X-Ray Ring is now being operated with a low emittance lattice. The horizontal emittance was reduced to 45 nm-rad from 90 nm-rad at 2.584 GeV while maintaining a vertical emittance of 0.1 nm-rad. The electron beam lifetime was unaffected by the emittance reduction because the decrease in the dispersion in the dipole magnets compensate for the higher bunch density in the Touschek effect. The lattice will also be implemented at 2.8 GeV after the strength of the focusing sextupoles is increased. The effect of low emittance operation on the synchrotron radiation users will be discussed.