Analysis of the wake field effects in the PEP-II storage rings with extremely high currents

作者：Novokhatski A^*; Seeman J; Sullivan M

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2014, 735: 349-365.

DOI：10.1016/j.nima.2013.09.039

• Wake fields
• Higher order modes
• RF heating
• Beam instabilities

We present the history and analysis of different wake field effects throughout the operational life of the PEP-II SLAC B-factory. Although the impedance of the high and low energy rings is small, the intense high-current beams generated a lot of power. The effects from these wake fields are: heating and damage of vacuum beam chamber elements like RF seals, vacuum valves, shielded bellows, BPM buttons and ceramic tiles; vacuum spikes, vacuum instabilities and high detector background; and beam longitudinal and transverse instabilities. We also discuss the methods used to eliminate these effects. Results of this analysis and the PEP-II experience may be very useful in the design of new storage rings and light sources.

• 出版日期2014-1-21