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RIS citation export for SUSPL057: Effect of Model Errors on the Closed Orbit Correction at the SIS18 Synchrotron of GSI

TY - CONF
AU - Mirza, S.H.
AU - Forck, P.
AU - Klingbeil, H.
AU - Singh, R.
ED - Koscielniak, Shane
ED - Satogata, Todd
ED - Schaa, Volker RW
ED - Thomson, Jana
TI - Effect of Model Errors on the Closed Orbit Correction at the SIS18 Synchrotron of GSI
J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018
C1 - Vancouver, BC, Canada
T2 - International Particle Accelerator Conference
T3 - 9
LA - english
AB - A fast closed orbit feedback system (bandwidth in the order of 1 kHz) is under development at the GSI SIS18 synchrotron for the orbit correction from injection to extraction including the acceleration ramp. The static process model, represented as the orbit response matrix (ORM), is subjected to the systematic optics changes during ramp e.g. beta function and phase advance variations at the locations of BPMs and steerers. In addition to these systematic variations, model mismatches may arise from dipole and quadrupole magnet errors, space charge dependent tune shift as well as BPM and steerer calibration errors. In this contribution, the effects of these model errors on the closed orbit correction are investigated which is necessary for the robust stability analysis of the feedback controller. For the robustness tests, the traditional SVD-based matrix pseudo-inversion is compared to a Fourier-based analysis. The results are achieved by detailed simulations in MADX.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 2080
EP - 2083
DA - 2018/06
PY - 2018
SN - 978-3-95450-184-7
DO - 10.18429/JACoW-IPAC2018-WEPAK003
UR - http://jacow.org/ipac2018/papers/wepak003.pdf
ER -