Performance of the Fast Orbit Feedback System with the Double-Double Bend Achromat Installed in Diamond Light Source release_gwgsjmtrxrg4hn67vspjz4vfz4

by Sandira Gayadeen, Guenther Rehm, Volker RW Schaa, Arduini, Gianluigi (Ed.), Pranke, Juliana (Ed.), Seidel, Mike (Ed.), Lindroos, Mats (Ed.)

Published by JACoW, Geneva, Switzerland.

2017   Volume IPAC2017, Denmark


At Diamond Light Source, the Double-Double Bend Achromat (DDBA) lattice upgrade involved the conversion of one cell of the storage ring from a double bend achromat (DBA) structure to a double-DBA (DDBA). The new cell includes corrector magnets that are different in design to the DBA corrector magnets. The DDBA vacuum chamber cross section is also different from the DBA cells and includes both stainless steel and copper sections over which corrector magnets are fitted. The performance of the Fast Orbit Feedback (FOFB) used for electron beam stabilisation with the DDBA cell installed is presented in this paper. Firstly the different corrector magnet dynamic responses are characterised and secondly the closed loop performance of the FOFB is measured and analysed for the upgraded lattice.
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