IMPROVMENTS TO THE BEPC STORAGE RING LATTICE

  • The principles and results to improve the BEPC storage ring lattice are described. The minimum β*x is chosen to be 0.08m so that the design luminosity reaches 2×1031cm-2﹒s-1. Increasing the ratio β*x/β*y, the required aperture of insertion quadrupoles as well as horizontal chromatic aberrations are reduced. A trunk with more variables of QFstrength is adopted to provide better dispersion suppression and smaller β function, modulation and the dynamical aperture of 12σx×12σy×12σE is attained. The phase advance between two major kickers is changed to be close to 180° in order to simplify the injection system. 4 straight sections where dispesion Dx is large are provided to place emittance control wigglers and other, 4 straight sections near to the zero disnersion regions will be useful for synchrotron radiation applications.
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  • [1] 中国科学院高能物理所;"22/28亿电子伏北京正负电子对撞机(BEPC)初步设计提要”(1982),[2] "BEPC磁聚焦结构三个方案的比较”高能所校子动力学组内部报告.(1984.1),[3] 陈利民、陈思育、梁的如、吕继华、张闯:"BEPC第二版的磁聚焦组态1-4", 高能所拉子动力学组内部报告·(1984:3)[4] 中国科学院高能物理所:"2.2京电子伏储存环初步设计提要(修订版)"(1984)[5] B. Richter: "Tune Shifi. in Stora示Ring for Separated' Beam Operation"[6] 方守资: 原子能科学技术, V19(1985), 650.[7] E D, CouFant, H. S. Snyder, Ann. Phys., Vol. 3 (1958), 1-48.[8] H Wiedeuiann: "Chromaticity Corredion in Larga Storage Rings", Report PEPS 220 (1976),[9] 张闯;“相位差附近的两块冲击磁铁对尹振荡的扰动”痛能所拉子动力学组内部报告(1983.9),[10] 陈思育“四极磁铁好场区外磁场下降对注入束团一次通过的影响”, 高能所拉子动力学组内部报A (1983.10),[11] 陈利民:"BEPC用作同步辐射光源的初步研究”, 同步辐射应用学术讨论会)资料之八, (1983.4).
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FANG Shou-Xian, CHEN Li-Min, CHEN Sen-Yu, CHEN Si-Yu, LIANG Xiu-Ru and ZHANG Chuang. IMPROVMENTS TO THE BEPC STORAGE RING LATTICE[J]. Chinese Physics C, 1986, 10(2): 207-214.
FANG Shou-Xian, CHEN Li-Min, CHEN Sen-Yu, CHEN Si-Yu, LIANG Xiu-Ru and ZHANG Chuang. IMPROVMENTS TO THE BEPC STORAGE RING LATTICE[J]. Chinese Physics C, 1986, 10(2): 207-214. shu
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Received: 1900-01-01
Revised: 1900-01-01
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IMPROVMENTS TO THE BEPC STORAGE RING LATTICE

    Corresponding author: FANG Shou-Xian,

Abstract: The principles and results to improve the BEPC storage ring lattice are described. The minimum β*x is chosen to be 0.08m so that the design luminosity reaches 2×1031cm-2﹒s-1. Increasing the ratio β*x/β*y, the required aperture of insertion quadrupoles as well as horizontal chromatic aberrations are reduced. A trunk with more variables of QFstrength is adopted to provide better dispersion suppression and smaller β function, modulation and the dynamical aperture of 12σx×12σy×12σE is attained. The phase advance between two major kickers is changed to be close to 180° in order to simplify the injection system. 4 straight sections where dispesion Dx is large are provided to place emittance control wigglers and other, 4 straight sections near to the zero disnersion regions will be useful for synchrotron radiation applications.

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