NEW DIAGNOSTICS AND CURES FOR COUPLED-BUNCH INSTABILITIES

Technical Report · Tue Aug 06 00:00:00 EDT 2002

DOI:https://doi.org/10.2172/799991· OSTI ID:799991

Teytelman, Dmitry ^[1]

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1. SLAC

As circular accelerators move towards larger numbers of bunches and higher beam currents, the task of diagnosing and curing coupled-bunch instabilities becomes ever harder. This paper describes the use of phase space tracking, i.e. reconstruction of bunch phase space trajectories, as a comprehensive instability diagnostic. A new instability cure is also presented, based on recent insights into the dynamics of unevenly-filled rings. Data is shown from PEP-II and the ALS, where ''optimally shaped'' uneven fills have yielded significant increases in instability thresholds.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 799991
• Report Number(s): SLAC-PUB-9349
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
BEAM CURRENTS
CURING
INSTABILITY
PHASE SPACE
TRAJECTORIES