NDLI: A transverse beam instability in the PEP-II HER induced by discharges in the vacuum system

Content Provider	IEEE Xplore Digital Library
Author	Wienands, U. DeBarger, S. Colocho, W. Decker, F.-J. Ecklund, S. Fisher, A. Fox, J. Kulikov, A. Novokhatski, A. Stanek, M. Sullivan, M.K. Wittmer, W. Wright, D. Yocky, G.
Copyright Year	2007
Description	Author affiliation: SLAC, Stanford (Wienands, U.; DeBarger, S.; Colocho, W.; Decker, F.-J.; Ecklund, S.; Fisher, A.; Fox, J.; Kulikov, A.; Novokhatski, A.; Stanek, M.; Sullivan, M.K.; Wittmer, W.; Wright, D.; Yocky, G.)
Abstract	Towards the end of Run 5, transverse instability in the High Energy Ring (HER) curtailed the maximum beam current achievable during physics running. Techniques used in tracking down this instability included fast monitoring of background radiation, temperatures and vacuum pressure. In this way, the origin of the instability was localized and inspection of the vacuum system revealed several damaged bellows shields. Replacing these units significantly reduced the incident rate but did not eliminate it fully. After the end of the run, a number of damaged rf seals were found, possibly having caused the remaining incidents of instability. In Run 6, instability has recurred. In this paper we will outline the steps taken to diagnose the issue and compare the different signatures of instabilities we have seen in PEP-II.
Starting Page	1811
Ending Page	1813
File Size	1462782
Page Count	3
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4440906
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vacuum systems Physics Radiation monitoring Temperature Vacuum technology Inspection Bellows Seals Feedback Spectrogram
Content Type	Text
Resource Type	Article

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A Transverse Beam Instability in the PEP-II HER Induced by Discharges in the Vacuum System

Slac-pub-12717 a transverse beam instability in the pep-ii her induced by discharges in the vacuum system ∗.

THE ELECTRON-CLOUD INSTABILITY IN PEP-II: AN UPDATE

A zero-length bellows for the PEP-II High-Energy Ring

Modeling of the sparks in Q2-bellows of the PEP-II SLAC B-factory

Transverse feedback systems for the PEP-II B-factory

The vacuum system for the pep ii high energy ring straight sections.

Vacuum performance and beam life time in the PEP II storage rings

Status of the pep-ii transverse feedback systems*.

A transverse beam instability in the PEP-II HER induced by discharges in the vacuum system

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A Transverse Beam Instability in the PEP-II HER Induced by Discharges in the Vacuum System

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A zero-length bellows for the PEP-II High-Energy Ring

Modeling of the sparks in Q2-bellows of the PEP-II SLAC B-factory

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