A quasi-isochronous operation mode for the LNLS UVX storage ring

We present an operation mode with very small momentum compaction factor for the LNLS UVX electron storage ring under construction in Campinas, Brazil. We establish conditions for longitudinal single particle stability in this quasi-isochronous mode including second order longitudinal and transverse effects. The results indicate that it is possible to operate this ring with the momentum compaction reduced by a factor of 100 with respect to the normal operation mode.<>