Minimum emittance in TBA and MBA lattices  

作　　者：徐刚 彭月梅 

机构地区：[1]Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics C》2015年第3期77-82,共6页中国物理C（英文版）

摘　　要：For reaching a small emittance in a modern light source, triple bend achromats （TBA）, theoretical minimum emittance （TME） and even multiple bend achromats （MBA） have been considered. This paper derived the necessary condition for achieving minimum emittance in TBA and MBA theoretically, where the bending angle of inner dipoles has a factor of 31/3 bigger than that of the outer dipoles. Here, we also calculated the conditions attaining the minimum emittance of TBA related to phase advance in some special cases with a pure mathematics method. These results may give some directions on lattice design.For reaching a small emittance in a modern light source, triple bend achromats （TBA）, theoretical minimum emittance （TME） and even multiple bend achromats （MBA） have been considered. This paper derived the necessary condition for achieving minimum emittance in TBA and MBA theoretically, where the bending angle of inner dipoles has a factor of 31/3 bigger than that of the outer dipoles. Here, we also calculated the conditions attaining the minimum emittance of TBA related to phase advance in some special cases with a pure mathematics method. These results may give some directions on lattice design.

关 键 词：minimum emittance dipole achromats light source 

分 类 号：O572.2[理学—粒子物理与原子核物理]