A COMPLEX CORBA APPLICATION

One of the most complex CORBA applications at the SLS is the implementation of a slow and the system integration of a fast global orbit feedback system. The system is based on 72 Beam Position Monitors (BPMs) and 72 correctors in the horizontal and vertical plane distributed around the storage ring. The corrector/BPM response matrix is ``inverted'' using SVD in case of a non quadratic response matrix taking into account all eigenvalues. The realization of the global orbit feedback has been carried out in two steps. A Slow Orbit Feedback (SOFB) with relaxed requirements ($<$ 3 Hz correction rate) is in operation since August 2001 [5]. The experience gained with the various subsystems served as a basis for the implementation of a Fast Orbit Feedback (FOFB) (4 KHz orbit sampling rate) which is presently under commissioning [6].