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A 1.3 GeV synchrotron radiation storage ring at SRRC has been operated for more than a year since October 1993.Starting fiom April 1994, the machine has been open to the user community. In February 1995, We installed a wiggler magnet of 1.8 tesla 25-pole in the ring and successfully commissioned. The machine was scheduled for the users' runs from the middle of April this year. We describe the performance of the machine without wiggler magnet system and then report the wiggler effects on the beam dynamics of the storage ring, e.g., tune shift, beta-beating, orbit change, nonlinear dynamics effect, etc. Some measurements are compared with the model prediction and agreement between them was fairly good. Possible actions to minimize wiggler effects have been taken, such as orbit correction as a function wiggler gap change. The machine improvement projects, such as longitudinal and transverse damping systems as well as orbit stability feedback system are under construction and will be in use soon.

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A Hamamatsu C5680 streak camera was set up to observe the beam motion at one of the synchrotron light ports at SRRC. The single bunch, two bunches and a few bunches longitudinal beam motion were observed by the streak camera. The longitudinal dipole mode motion was seen in some cases. The oscillation amplitude was measured and compared with the signal from stripline on spectrum analyzer. The experimental observation was also compared with theoretical predictions.

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