Correction of dispersion and the betatron functions in the CEBAF accelerator

Lebedev, Valeri; Bickley, M.; Schaffner, S.; Zeijts, J. van; Krafft, Geoffrey; Watson, Chris

doi:10.2172/378904

1996

DOI: 10.2172/378904

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Correction of dispersion and the betatron functions in the CEBAF accelerator

Valeri Lebedev¹,

M. Bickley²,

S. Schaffner³

et al.

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Linear optics correction in the CEBAF accelerator

Lebedev

Bickley²,

Bisognano³

et al.

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)

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During commissioning of the CEBM accelerator, correcting dispersion, momentum compaction and betatron beam envelopes was essential for robust operation. To speed the diagnostic process we developed a method which allows one to track and correct the machine optics on-line.The method is based on measuring the propagation of 30 Hz modulated betatron oscillations. The beam optics of the accelerator was altered to decrease lattice sensitivity at critical points and to simpli@ control of the betatron function match. The calculation of the Courant-Snyder invariant from signals of each pair of beam position monitors was used for a correction of the betatron functions. The experience of optics correction and the study of long and short term machine reproducibility obtained during 1996 and early 1997 are also discussed. With minor modifications this method can also be used for on-line optics measurement and correction in circular accelerators.

show abstract

Linear optics correction in the CEBAF accelerator

Lebedev

Bickley²,

Bisognano³

et al.

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)

View full text Add to dashboard Cite

show abstract

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Correction of dispersion and the betatron functions in the CEBAF accelerator

Cited by 1 publication

References 0 publications

Linear optics correction in the CEBAF accelerator

Linear optics correction in the CEBAF accelerator

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