- Open Access
Efficiency of feedbacks for suppression of transverse instabilities of bunched beams
Phys. Rev. Accel. Beams 19, 084402 – Published 5 August, 2016
DOI: https://doi.org/10.1103/PhysRevAccelBeams.19.084402
Abstract
Which gain and phase have to be set for a bunch-by-bunch transverse damper, and at which chromaticity is it better to stay? These questions are considered for three models: the two-particle model with possible quadrupole wake, the author’s nested head-tail (NHT) model with the broadband impedance, and the NHT with the LHC impedance model. Details of 2D areas of stability in the chromaticity-intensity and chromaticity-gain planes and possibilities to use them are discussed. It is shown that resistive feedbacks may generate asymmetry of the tune shift distribution, which requires positively-shifted stability diagrams.
Physics Subject Headings (PhySH)
Article Text
References (10)
- R. D. Kohaupt, Report No. DESY M-80/19, 1980.
- R. Talman, Report No. CERN ISR-TH/81-17, 1981; Nucl. Instrum. Methods Phys. Res. 193, 423 (1982).
- R. Ruth, Report No. CERN LEP-TH/83-22, 1983.
- A. Chao, Physics of Collective Beam Instabilities in High Energy Accelerators (John Wiley & Sons, New York, 1993).
- A. Burov, Nested head-tail Vlasov solver, Phys. Rev. ST Accel. Beams 17, 021007 (2014).
- N. Mounet, Report No. CERN-THESIS-2012-055, 2012.
- S. Myers, in Proceedings of the 1987 Particle Accelerator Conference (IEEE, Washington, DC, 1987), p. 503.
- K. Yokoya, KEK Report No. 92-196, 1993.
- M. Borland, G. Decker, L. Emery, W. Guo, K. Harkay, V. Sajaev, and C.-Y. Yao, APS Storage Ring Parameters, 2010, http://www.aps.anl.gov/Accelerator_Systems_Division/Accelerator_Operations_Physics/SRparameters/node1.html.
- L. Arnaudon, S. Myers, R. Olsen, and E. Peschardt, in Proceedings of 3rd European Particle Accelerator Conference, Berlin, Germany, 1992, p. 66.
