| Title |
Optics Correction and Low Emittance Tuning at the Phase 1 commissioning of SuperKEKB |
| Authors |
- Y. Ohnishi, Y. Funakoshi, H. Koiso, A. Morita, K. Oide, H. Sugimoto
KEK, Ibaraki, Japan
|
| Abstract |
The SuperKEKB collider has finally come to the first commissioning, Phase 1 without the final focus system and before Belle II detector roll-in. In order to accomplish a extremely high luminosity of 8x10³⁵ cm⁻²s⁻¹, the nano-beam scheme is adopted. Since the vertical emittance is one of keys in this scheme, optics corrections for low emittance tuning are applied. The non-interleaved sextupole scheme is utilized in the arc section. Skew quadrupole-like corrector is equipped for each sextupole. These skew quadrupole-like correctors can correct both X-Y coupling and physical vertical dispersions which induce the vertical emittance. Beta function and physical horizontal dispersion are corrected by fudge factors of quadrupoles and/or horizontal orbit bumps at the sextupoles. Overall optics performance as well as the strategy of low emittance tuning is also presented.
|
| Paper |
download TUT3BH2.PDF [0.828 MB / 4 pages] |
| Export |
download ※ BibTeX
※ LaTeX
※ Text/Word
※ RIS
※ EndNote |
| Conference |
eeFACT2016, Daresbury, UK |
| Series |
ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e^+e^- Colliders (58th) |
| Proceedings |
Link to full eeFACT2016 Proccedings |
| Session |
Machine Tuning |
| Date |
25-Oct-16 17:35–18:55 |
| Main Classification |
Machine Tuning |
| Keywords |
ion, sextupole, emittance, optics, coupling |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Ning Zhao (IHEP, Beijing, China); John Poole (CERN, Geneva, Switzerland); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-187-8 |
| Published |
July 2017 |
| Copyright |
|
