ࡱ> x{w Rbjbj2$ee"""""6668n46Ġ666!!!!!!$PRE9"66666E""x~0006""0600}mau`#]2j)pJ 0Ġspauauf"džD66066666EE0666Ġ6666666666666, : Minutes of CEPC Accelerator Physics Meeting 2017.08.18 Place: Room C407, Main Building, IHEP Convener: Chenghui Yu Attendee: Jie Gao, Chenghui Yu, Chuang Zhang, Yuan Zhang, Yudong Liu, Huiping Geng, Yiwei Wang, Dou Wang, Bai Sha, Cai Meng, Xiaohao Cui, Tianjian Bian, Dengjie Xiao, Wenhao Xia, Dianjun Gong, Haocheng Xu RecorderDou Wang Summary of minutes Firstly, Cai Meng reported his progress on design study for CEPC Linac. He has compared the cost for 4GeV linac and 10GeV linac. Discussions: 1) CEPC main ring sextupole should be lengthened in order to reduce the pole strength 2) The start energy of Pre-booster can be increased to 10 GeV if needed. Yuan Zhang introduced his studies on DA optimization with radiative fluctuation. He has compared the optimization with different population size. Also he suggested to lengthen the arc quadrupole to reduce the effect of fluctuation. Dou introduced the updated of CEPC parameters. IP betax has been increased to 0.36m. Tianjian reported his study of orbit correction on CEPC booster. Yiwei reported the newest update of Lattice Design for CEPC Main Ring with 0.36m betax*. Also he tried to lengthen the arc sextupoles. Dianjun introduced CEPC DR Z-pole HL and BL phase shift comparison. RF phase shift can be mitigated very well by appropriate filling patterns. The next meeting will be on Aug. 25th, 2017. %,/012568=DEHOP^fhst|~ƹӟӒxӟӟӬk^QhJJCJOJQJaJo(h?CJOJQJaJo(hiCJOJQJaJo(h*+CJOJQJaJo(hv CJOJQJaJo(hRI)CJOJQJaJo(h*+5CJOJQJaJh\CJOJQJaJo(h/CJOJQJaJo(hCJOJQJaJo(h*+CJOJQJaJ h*+5CJ$OJPJQJaJ$o(h*+5CJ$OJPJQJaJ$,78^tA  < @  W ?  & FVdWDXD2YD2^`Vgd\HdWDXD2YD2^`gd* & FVdWDXD2YD2^`VgdXD2ldWD*^l`d$a$  % @ A  < ˾夗}pcWJW;h*+5CJOJPJQJaJh*+5CJOJQJaJh*+CJOJQJaJhCJOJQJaJo(h/CJOJQJaJo(h-yECJOJQJaJo(hC CJOJQJaJo(hCJOJQJaJo(hICJOJQJaJo(hRI)CJOJQJaJo(h"CJOJQJaJo(hJJCJOJQJaJo(hTCJOJQJaJo(hrCJOJQJaJo(h9+CJOJQJaJo(< N ` : < > @ B  V W x { ŸşvaJ;huhuCJOJQJaJ,h$@huB*CJKHOJQJaJo(ph)h$@huB*CJKHOJQJaJphh0) CJOJQJaJh0) CJOJQJaJo(hh*CJOJQJaJo(h],CJOJQJaJo(h*CJOJQJaJh/CJOJQJaJo(h*CJOJQJaJo(hh/CJOJQJaJo(hCJOJQJaJo(hI)h?CJOJQJaJo( > ? M N Q P[\co˿˯qbUH9hMxhMxCJOJQJaJhJJCJOJQJaJo(hMxCJOJQJaJo(h\Hhle4CJOJQJaJhMxCJOJQJ\aJo(hle4hle4CJOJQJ\aJhle4h\HCJOJQJaJo(hle4CJOJQJ\aJo(h0) hICJOJQJaJo(hle4CJOJQJaJhle4CJOJQJaJo(h0) CJOJQJaJo(huCJOJQJaJo(hICJOJQJaJo( \$^t__${d4$VDWDy^{`a$ dWD`gd@8 dWD`gd3Aa$dWD`a$gdrb2 hdWD`hgd[DedWDXD2YD2`gdo& & FWdWDOXD2YD2^`Wgd & FVdWDXD2YD2^`Vgdl   ƶuhXH;ho&CJOJQJaJo(hQ#hrb2CJOJQJaJo(h[Dehrb2CJOJQJaJo(h~CJOJQJaJo(hCJOJQJaJo(hrb2CJOJQJaJo(hZCJOJQJaJo(h kCJOJQJaJo(hE wCJOJQJaJo(hv h|lCJOJQJaJo(h\HhCJOJQJaJo(hlhlCJOJQJaJhlCJOJQJaJo(hICJOJQJaJo(RecorderDou Wang CheckupChenghui Yu, Jie Gao 2017-08-18     2 / 2 1 / 1 4LNdfhjlnprx~rz|㽰㌄woidw[woih3AaCJaJo( h*+o( h*+aJh*+CJaJh*+CJaJo(h$@jh$@Uh*+OJQJaJhCJOJQJaJo(h CJOJQJaJo(h/CJOJQJaJo(h~CJOJQJaJo(h;CJOJQJaJh;CJOJQJaJo(h*+CJOJQJaJUhRI)hfE{CJOJQJaJ"^~$WD0`$$i{d4$VDWDy]i^{`a$0182P. 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