SPPC Progress Report Tang Jingyu 3 rd CEPCSPPC

SPPC Progress Report Tang Jingyu 3 rd CEPC-SPPC Collaboration Meeting April 8 -9, 2016, IHEP

Main topics • • General information Collider accelerator physics Technical issues Injector chain R&D planning About team and collaboration Summary 2

General information • Since the last CEPC-SPPC study group meeting (Sep. 11 -12, 2016) – Work on collider accelerator physics continues – Work on technical issues advances slowly – Schemes on injector chain updated • New fund from MOST for CEPC-SPPC R&D hopeful, though little going to SPPC • Monthly group meeting maintained 3

Collider Accelerator Physics • General parameters: all AP members (Tang Jingyu coordinates). • Lattice design: three persons (Su Feng, Chen Yukai, Zhang Linhao) working on SPPC lattice – Race-track lattice to be compatible with CEPC partial double-ring – We do not need to by-pass the CEPC detectors – Different schemes (70, 100 Te. V) 4

• Collimation study: two persons (Zou Ye, Yang Jianquan) working on the study. Good progress has been made. – Combined transverse and longitudinal collimation in one long straight section – Franck Schmidt of CERN will visit IHEP to help SIXTRACK installation, and simulations 5

• Instabilities: Liu Yudong continues to work on instabilities • Longitudinal dynamics: Peng Yuemei continues to work on it, with some help from Dai Jianping (especially on RF systems and injector accelerators) • Other topics: needing more volunteers or engaged persons to put more time on 6

Technical issues • High-field superconducting magnets – Continuous efforts by Xu Qingjin and his group – Workshop on High-Temperature and High-Field Superconducting Materials and Application Technology will be held on April 28 -29, 2016 in Shanghai • Beam screen and vacuum – Zhu Kun (and a PKU student) continues to study new schemes – Wang Yong (and students) studying SEY for different materials • RF systems – Dai Jianping is studying RF systems for both the collider and the injector accelerators • Other technical issues – Needing motivation and funds 7

Injector chain • More efforts have been made in the injector chain • Updating the accelerator schemes and parameter lists • p-Linac/i-Linac: Lu Yuanrong is working on the survey and first design • p-RCS: Tang Jingyu is working on the first design concept • MSS: no new report from the student • SS: Wang Xiangqi and students have made large effort in the first design concept 8

R&D planning • We need long-term R&D efforts to meet the requirements for building SPPC; some of key technologies are extremely challenging. • Both funds and manpower are needed • CEPC-SPPC management is making efforts to obtain the first R&D fund from MOST, SPPC is only a small part of the package; hopefully in the second MOST R&D, there will be much higher weight for SPPC. • Paper work on key issues should be pursued, to learn the technical progress and tendency around the world; to provide evidence support for the future R&D applications 9

About team and collaboration • SPPC study team is still growing. Welcome to new comers • CEPC-SPPC is discussing to form an international collaboration structure. We will fit us within the frame. 10

Summary • We are making progress on SPPC study steadily. • Study team gradually building up, but more people are welcomed. • As no large funds for key R&D efforts, study will be focused on paper work. • Once the international collaboration structure is formed, there will be more efficiency organization of the study. • We should work together for the CDR report by end 2016. 11

WELCOME COMMENTS! 12