Study on high-Luminosity Electron-Positron Colliders

1997年至1999年，布克核物理研究所（BNP）和高能加速器研究组织（KEK）在电子正对撞机方面进行了三年的合作。BNP已经在较早的几天内与这种类型的机器一起工作，并考虑为他们的未来项目建设Phai和TauCharm工厂。KEK于1998年完成了KEKB的构造，一个不对称能源B工厂。在两个主要实验室之间的合作，在电子正对撞机领域对双方都是有利的。（1） Construction of 900 horizontal steering magnets for KEKB by BINP-KEKB needs high-quality steering magnets and BNP constructed them with a satisfactory quality。（2） Theoretical study on beam-beam interactions and study on round-beam collision at VEPP-2 M at BINP-instManagement ities 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。在VEPP-2 M上可能进行的圆形光束收集实验在KEK和BIMP之间进行了讨论。（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-BNP researchers participated in KEKB commissioning。KEKB is now supplying beams to physics experiment and its luminosity has surpassed 10-D133-D1 cm D3-2（/）D3 - 1 -1 D1。

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.