Improved Design for a Super-B Interaction Region.

Sullivan, M. ; Bettoni-Raimondi, P. ; Seeman, J. ; Wienands, U.

Technical Information Center Oak Ridge Tennessee

关键词: B mesons;    Design;    Magnetic fields;    Colliding beams;    Accelerators;   

RP-ID  :  DE2008935308

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We present an improved design for a Super-B interaction region. The new design attempts to minimize the bending of the two colliding beams which results from shared magnetic elements near the Interaction Point (IP). The total crossing angle at the IP is increased from 34 mrad to 50 mrad and the distance from the IP to the first quadrupole is increased. Although the two beams still travel through this shared magnet, these changes allow for a new magnetic field design with a septum which gives the magnet two magnetic centers. This greatly reduces the beam bending from this shared quadrupole and thereby reduces the radiative bhabha background for the detector as well as any beam emittance growth from the bending. We describe the new design for the interaction region.