Wakefield Band Partitioning in LINAC Structures

Technical Report · Tue Mar 25 04:00:00 EST 2003

DOI:https://doi.org/10.2172/812945· OSTI ID:812945

Jones, Roger M ^[1]

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1. SLAC

In the NLC project multiple bunches of electrons and positrons will be accelerated initially to a centre of mass of 500 GeV and later to 1 TeV or more. In the process of accelerating 192 bunches within a pulse train, wakefields are excited which kick the trailing bunches off axis and can cause luminosity dilution and BBU (Beam Break Up). Several structures to damp the wakefield have been designed and tested at SLAC and KEK and these have been found to successfully damp the wakefield [1]. However, these 2{pi}/3 structures suffered from electrical breakdown and this has prompted us to explore lower group velocity structures operating at higher fundamental mode phase advances. The wakefield partitioning amongst the bands has been found to change markedly with increased phase advance. Here we report on general trends in the kick factor and associated wakefield band partitioning in dipole bands as a function of phase advance of the synchronous mode in linacs. These results are applicable to both TW (travelling wave) and SW (standing wave) structures.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 812945
• Report Number(s): SLAC-PUB-9467
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
DILUTION
DIPOLES
ELECTRICAL FAULTS
ELECTRONS
LINEAR ACCELERATORS
LUMINOSITY
POSITRONS
STANFORD LINEAR ACCELERATOR CENTER
VELOCITY