Vacuum control system for the MLI Model 1.2-400 Synchrotron Light Source

The control system for the MLI Model 1.2-400 Synchrotron Light Source is discussed. This system controls the injection of 200-MeV electrons from the linear accelerator into the storage ring, and the acceleration of the beam to 1.2 GeV, after accumulating current of 400 mA. The ring consists of eight bending magnets, 20 quadrupoles, 16 sextupoles, an RF cavity driven at 500 MHz, and miscellaneous vacuum and utility support equipment. The control system also supports a transport line that consists of two dipoles, 11 quadrupoles, and five fast injection magnets. The storage ring is a synchrotron radiation source for research applications, including development of X-ray lithography techniques. The approach and hardware and software implementation are discussed, and preliminary performance data are presented. >