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Study on high-Luminosity Electron-Positron Colliders

高光度正负电子对撞机研究

基本信息

批准号：
09045040
负责人：
YOSHIOKA Masakazu
金额：
$ 4.22万
依托单位：
KEK, High Energy Accelerator Research Organization
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Collaboration on Electron-Positron Colliders went on between Budker Institute of Nuclear Physics (BINP) and High Energy Accelerator Research Organization (KEK) for three years from JFY1997 to JFY1999. BINP has been working on colliders from the very early days of this type machines and is considering to construct Phai and TauCharm factories for their future projects. KEK has completed the construction of KEKB, an asymmetric-energy B-factory, in 1998. The collaboration between the two major laboratories in the field of electron-positron colliders has been beneficial to both parties.(1) Construction of 900 horizontal steering magnets for KEKB by BINP - KEKB needs high-quality steering magnets and BINP constructed them with a satisfactory quality.(2) Theoretical study on beam-beam interactions and study on round-beam collision at VEPP-2M at BINP - instabilities due to head-tail effect at beam-beam collision, emittance growth due to beam-beam collision, and dependence of the flip-flop effect on the aspect ratio of beams at collision were theoretically studied. Possible experiment of round-beam collisions at VEPP-2M was discussed between KEK and BINP.(3) Theoretical study on fast-ion instability - It was shown theoretically that the fast-ion instability might be suppressed due to tune variation along a bunch train.(4) commissioning of KEKB - BINP researchers participated in KEKB commissioning. KEKB is now supplying beams to physics experiment and its luminosity has surpassed 10ィイD133ィエD1cmィイD3-2(/)sィエD3ィイD1-1ィエD1.

从1997年到1999年，巴克尔核物理研究所（BINP）和高能加速器研究组织（KEK）在正负电子对撞机方面进行了三年的合作。BINP从这种机器的早期就一直在研究对撞机，并正在考虑为他们未来的项目建造Phai和TauCharm工厂。KEK于1998年完成了KEKB-一个非对称能源B-工厂的建设。两大实验室在正负电子对撞机领域的合作对双方都有利。(1)BINP为KEKB建造900个水平转向磁铁- KEKB需要高质量的转向磁铁，BINP以令人满意的质量建造了它们。(2)在BINP的VEPP-2 M上进行了束-束相互作用的理论研究和圆-束碰撞的研究-理论上研究了由于束-束碰撞时的头尾效应引起的不稳定性、由于束-束碰撞引起的发射度增长以及碰撞时的触发效应对束的纵横比的依赖性。KEK和BINP讨论了在VEPP-2 M上进行圆束碰撞实验的可能性。(3)快离子不稳定性的理论研究--理论上表明，快离子不稳定性可能由于束团串沿着的调谐变化而被抑制。(4)KEKB的调试- BINP的研究人员参与了KEKB的调试。KEKB目前正在为物理实验提供光束，其亮度已超过10 μ m D133 μ m D1cm D3-2（/）s D3 μ m D1-1 μ m D1。