IPAC'25 - the 16th International Particle Accelerator Conferece

Operational challenges of the SuperKEKB iBump feedback system

THPS011

5 Jun 2025, 15:30

2h

Exhibiton Hall A _Salmon (TWTC)

Poster Presentation MC6.T05 Beam Feedback Systems Thursday Poster Session

Speaker

John Salvesen (European Organization for Nuclear Research)

Description

To maintain optimal beam collision conditions and luminosity performance, SuperKEKB requires a fast orbit feedback dedicated to correcting offsets at the interaction point (IP). The 'iBump' feedback system calculates IP beam offset from Beam Position Monitor (BPM) measurements before and after collision and corrects by creating closed orbit bumps in the High Energy Ring (HER). This system has demonstrated robustness at stabilising IP offsets during operation. In this paper, we discuss operational aspects of the system and ongoing challenges, with a focus on the identification of vertical offset as the correction target of the iBump system. Dedicated studies on the current dependence of this feedback target as well as historical data are analysed.

Funding Agency

This work was supported by the European Union’s Horizon programmes under grants no. 951754 (FCCIS) and no. 101086276 (EAJADE)