PEP的不对称b介子工厂

Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI:10.1109/PAC.1989.72944

A. Garren, S. Chattopadhyay, Y. Chin, P. Oddone, M. Zisman, M. Donald, G. Feldman, J. Paterson, J. Rees

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引用次数: 14

摘要

利用正电子计划(PEP)存储环中的正电子与新的低能环中的电子之间的不对称碰撞，对b工厂进行了初步设计。该设计利用靠近交互点(IP)的小孔径永磁四极体。讨论了IP处光学参数和光束参数的优化，以及相互作用区域和环的晶格设计。初步设计的12 GeV*2 GeV b工厂，称为Apiary I，给出了相当适中的亮度0.5*10/sup 33/ cm/sup -2/ s/sup -1/。一个主要的限制是PEP真空室可以吸收的功率。有人建议，通过进入一个更对称的系统，如9 GeV*3 GeV，有可能达到几乎高出四倍的光度。

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An asymmetric B-meson factory at PEP

A preliminary design for a B-factory has been made using asymmetric collisions between positrons in the Positron-Electron Project (PEP) storage ring and electrons in a new, low-energy ring. The design utilizes small-aperture, permanent-magnet quadrupoles close to the interaction point (IP). Optimization of optical and beam parameters at the IP is discussed, as well as the lattice design of the interaction region and of the rings. The preliminary design for a 12 GeV*2 GeV B-factory, called Apiary I, gives the rather modest luminosity of 0.5*10/sup 33/ cm/sup -2/ s/sup -1/. A major limitation was the power that can be absorbed by the PEP vacuum chamber. It is suggested that, by going to a more symmetrical system such as 9 GeV*3 GeV, it may be possible to go to a luminosity that is almost a factor of four higher.<>

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来源期刊

Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology

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