Title :
Studies of optical asymmetries in the ELETTRA storage ring
Author :
Ferrando, O. ; Karantzoulis, E.
Author_Institution :
Sincrotrone Trieste, Italy
Abstract :
Studies concerning the influence of linear and non linear imperfections in the ELETTRA storage ring are presented. Tracking simulations show that field errors and orbit errors in sextupoles perturb the machine periodicity with a consequent reduction in the dynamic aperture, injection efficiency and lifetime. To improve the machine performances it is important to determine the actual storage ring optics and the perturbation of the periodicity. A useful method to analyze perturbed optics is by measuring and fitting orbit response matrix data. This method allows to determine the magnet gradient distribution and, by adjusting the quadrupole field strengths, it is possible to restore the periodicity of the lattice. At ELETTRA we have analyzed measured response matrices and reconstructed the real optics of the machine. The results of the analysis are presented in this paper
Keywords :
accelerator magnets; electromagnets; electron accelerators; electron optics; matrix algebra; perturbation theory; storage rings; ELETTRA storage ring; field errors; linear imperfections; machine performances; magnet gradient distribution; nonlinear imperfections; optical asymmetries; orbit errors; orbit response matrix; perturbed optics; quadrupole field strengths; sextupoles; storage ring optics; tracking simulations; Dispersion; Extraterrestrial measurements; Lattices; Magnetic analysis; Magnetic field measurement; Matrix decomposition; Minimization methods; Optical sensors; Position measurement; Storage rings;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987185
