# ICHEP 2016 Chicago

3-10 August 2016
Chicago IL USA
US/Central timezone
There is a live webcast for this event.

## CEPC Partial Double Ring Lattice Design and SPPC Lattice Design

Aug 6, 2016, 6:00 PM
2h
Riverwalk A/B

### Riverwalk A/B

Poster Accelerator: Physics, Performance, R&D and Future Accelerator Facilities

### Speaker

Feng Su (IHEP,CAS)

### Description

In this paper, we introduced the layout and lattice design of Circular-Electron-Positron-Collider (CEPC) partial double ring (PDR) scheme and the lattice design of Super-Proton-Proton-Collider (SPPC). The baseline design of CEPC is a single beam-pipe electron positron collider, which has to adopt pretzel orbit scheme. And it is not suitable to serve as a high luminosity Z factory besides operated as a Higgs factory. We use separators about 1600 m ahead of IP1 and IP3 to separate the beam and 1600 m after them to recombine the beam to achieve local double ring scheme and crossing angle collision. This scheme has many advantages compared to the single ring scheme and head-on collision which is chosen in CEPC Pre-CDR. We can acquire a higher luminosity with less power consumption, avoid pretzel scheme which requires a rigorous lattice and be suitable to serve as a high luminosity Z factory with more bunches. In this paper, we discussed the details of CEPC partial double ring lattice design, the chromaticity corrected final focus system (FFS) optics and the dynamic aperture study and optimization. We also showed the layout and first version lattice design of SPPC main ring, including ARC, dispersion suppressor sections, IR and long straight sections, especially the low $\beta$ pp collision IR optics.

### Primary author

Feng Su (IHEP,CAS)

### Co-authors

Dr DOU WANG (IHEP) Gang XU (IHEP Beijing) Huiping Geng (IHEP) Jie GAO (IHEP) Jingyu Tang (Institute of High Energy Physics, CAS) Sha Bai (IHEP) Tianjian Bian (IHEP) Yiwei WANG Yuan Zhang

### Presentation materials

There are no materials yet.