Recent studies on beam-photoelectron instability in BEPC

Guo, Zhen; Huang, He; Li, S.P.; Liu, D.K.; Luo, Y.; Ma, Lizhen; Qin, Q.; Wang, L.F.; Wang, J.Q.; Wang, S.H.; Xu, Jie; Ye, K.R.; Zhang, C.; Zhou, Feng; Chin, Y.H.; Fukuma, H.; Hiramatsu, S.; Izawa, M.; Kasuga, T.; Kikutani, E.; Kobayashi, Yuki; Kurokawa, S.; Ohmi, K.; Sato, Yoichi; Suetsugu, Y.; Tobiyama, M.; Tsukamoto, Kazunori; Yokoya, K.

doi:10.1109/pac.1999.795780

Cited by 1 publication

(2 citation statements)

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“…Further refinements of ECI rise times have been made with time-domain measurements using a single-pass BPM system [29]. The measured value of ~6 ms compares well with the predicted value of 3 ms.…”

Section: Bepcmentioning

confidence: 62%

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Theory and measurement of the electron cloud effect

Harkay

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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Photoelectrons produced through the interaction of synchrotron radiation and the vacuum chamber walls can be accelerated by a charged particle beam, acquiring sufficient energy to produce secondary electrons (SEs) in collisions with the walls. If the secondary-electron yield (SEY) coefficient of the wall material is greater than one, a runaway condition can develop. In addition to the SEY, the degree of amplification depends on the beam intensity and temporal distribution. As the electron cloud builds up along a train of stored bunches, a transverse perturbation of the head bunch can be communicated to trailing bunches in a wakefield-like interaction with the cloud. The electron cloud effect is especially of concern for the high-intensity PEP-II (SLAC) and KEK B-factories and at the Large Hadron Collider (LHC) at CERN. An initiative was undertaken at the Advanced Photon Source (APS) storage ring to characterize the electron cloud in order to provide realistic limits on critical input parameters in the models and improve their predictive capabilities. An intensive research program was undertaken at CERN to address key issues relating to the LHC. After giving an overview, the recent theoretical and experimental results from the APS and the other laboratories will be discussed.

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Section: Bepcmentioning

confidence: 62%

“…Clearing electrodes have not shown promise as being effective (PF, PSR, etc). Quantitative measurements of the growth rate at BEPC [29] suggest that a feedback system may be effective. There is a need for a more quantitative theory.…”

Section: Discussionmentioning

confidence: 99%

Theory and measurement of the electron cloud effect

Harkay

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

View full text Add to dashboard Cite

show abstract

Recent studies on beam-photoelectron instability in BEPC

Cited by 1 publication

References 2 publications

Theory and measurement of the electron cloud effect

Theory and measurement of the electron cloud effect

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