Speakers
Description
Fast orbit response measurements are a key ingredient for the SOLEIL II commissioning, where the large number of magnets and variable-gap/phase insertion devices will make conventional DC orbit response matrix (ORM) measurements prohibitively time‑consuming. In 2025, a dedicated program at SOLEIL storage ring was conducted to develop and experimentally validate fast AC‑based techniques for ORM measurement and optics correction. A multi-frequency AC-ORM scheme was implemented using fast correctors and synchronized BPM acquisition, enabling the simultaneous excitation of multiple correctors and the rapid extraction of the ORM from sinusoidal beam motion. First measurements demonstrated a substantial reduction in acquisition time compared to the standard DC ORM procedure, while preserving consistency with the reference DC ORM within experimental uncertainties. In parallel, initial LOCOM with closed orbit modulation studies were carried out by processing large ensembles of modulated closed orbits, exploring near real‑time optics correction. The impact of these fast techniques was investigated in view of SOLEIL II commissioning scenarios. The paper will present the experimental implementation, data analysis methods, and comparison to standard LOCO‑based optics corrections. These results demonstrate the strong potential of AC‑driven ORM and LOCOM techniques to meet the stringent time and performance constraints of the SOLEIL II upgrade.
| In which format do you inted to submit your paper? | LaTeX |
|---|---|
| Preprint marking on your proceeding paper | I wish my paper to be marked as preprint. |