Attendance: Shanhong Chen, Yong Liu, Guangyi Tang, Bo Liu, Jianchun Wang, Shanzhen Chen, Gang Li, Manqi Ruan, Joao Guimaraes da Costa, Sen Qian, Huirong Qi, Haoyu Shi,
Connect remotely: Chengdong Fu, Franco Bedeschi, Hao Zeng, Jing Dong, Jianbei Liu, Jiechen Jiang, Linghui Wu, Manuel Rolo, Wei Wang, Weidong Li, Yaquan Fang, Yiming Li, Yukun Shi, Yunlong Zhang, Yunpeng Lu, Zhe Duan, Baohua Qi,
Method to measure the beam polarization by Shanhong Chen
Q: P8: why error of two plots are same?
A: Statistic error only, same statistic
Q: What's the relation with Zhe Duan's study?
A: There are two measurement. Shown in page, CEPC ARC and CEPC straight sections
Q: What's the physics precision requirement of transverse polarization?
A: Need to check and confirmed
Study of scintillation glass in PFA HCAL by Yukun Shi
Q: What is Birks effect?
A: effect of scintillator materials
Q: Page4: why size getting larger, resolution getting worse? Is it because the leakage?
A: No final choice yet
C: P9 description is not Gauss, need further study
C: Compare the cost of glass and plastic