2007/07/04 by N. Iida, J. Flanagan, Iida, N. +5
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Superconducting Materials and Applications #physics.acc-ph
paper · pdf · doi:10.48550/arxiv.0707.0539
3 pages, 4 figures, Particle Accelerator Conference 07, Albuquerque
arxiv created 2007/07/04 · openalex publication_date 2007/07/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In KEKB, synchrotron radiation interferometers (SRMs) are used for measuring the transverse beam sizes. There is also a tool for enlarging the vertical beam size intentionally by making an asymmetric bump, called an ``iSize'' bump, at one of the strongest non-interleaved sextupole magnets in each KEKB ring. The calibrations of the SRMs were checked by comparing the measured vertical beam sizes with those calculated using the computer code ``SAD''. The obtained correction factors are 1.000±0.045 for HER and 0.971±0.060 for LER, which are consistent with the calibration factors of SRMs\citeSRMcalib within errors. Using the obtained calibration factor, x-y coupling of each ring was calculated .