Comparison between various beam steering algorithms for the CEBAF lattice

In this paper the authors describe a comparative study performed to evaluate various beam steering algorithms for CEBAF lattice. The first approach that was evaluated used a Singular Value Decomposition (SVD) based algorithm to determine the corrector magnet setting for various regions of the CEBAF lattice. The second studied algorithm is known as PROSAC (Projective RMS Orbit Subtraction And Correction). This algorithm was developed at TJNAF to support the commissioning activity. The third set of algorithms tested are known as COCU (CERN Orbit Correction Utility) which is a production steering package used at CERN. A program simulating a variety of errors such as misalignment, BPM offset, etc. was used to generate test inputs for these three sets of algorithms. Conclusions of this study are presented in this paper