Control system design and upgrade considerations for the Duke Free Electron Laser Laboratory
The Duke Free Electron Laser Laboratory currently operates two FELs: the OK-4/Duke Storage Ring FEL, and the Mark III IR FEL. Both of these systems were among the early adopters of the Experimental Physics and Industrial Control System (EPICS). The Mark III EPICS control system was completed and operational in September, 1993. The Duke Storage Ring was commissioned in November of 1994 using EPICS. These control systems have proven to be very robust with high reliability over the intervening years. An overview of these current control systems and an upgrade strategy are presented.