| Published Articles | |
| Title | Off-momentum Optics at SuperKEKB |
| Author(s) | Ohnishi, Yukiyoshi (KEK, Tsukuba) ; Koiso, Haruyo (KEK, Tsukuba) ; Morita, Akio (KEK, Tsukuba) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Oide, Katsunobu (CERN) ; Sugimoto, Hiroshi (KEK, Tsukuba) |
| Publication | JACOW, 2019 |
| Number of pages | 5 |
| In: | 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.TUOBB02 |
| DOI | 10.18429/JACoW-eeFACT2018-TUOBB02 |
| Subject category | Accelerators and Storage Rings |
| Accelerator/Facility, Experiment | SuperKEKB |
| Abstract | The nano-beam scheme can squeeze the vertical beta function at the IP much smaller than the bunch length. It implies that the large chromaticity is generated in the vicinity of the final focus quadrupole magnets and the strong sextupoles are adopted to correct the chromaticity, for instance the local chromaticity corrections. While understanding of the off-momentum optics is important to optimize the dynamic aperture to make Touschek lifetime long and to reduce the luminosity degradation due to chromatic behaviors. In general, there is a discrepancy between measurements and those obtained from the optics model. The chromatic phase-advance is introduced to measure the off-momentum optics and correct by using sextupole magnets. |
| Copyright/License | publication: © 2018-2024 Authors (License: CC-BY-3.0) |
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Rekord stworzony 2020-03-20, ostatnia modyfikacja 2020-07-16