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Phys. Rev. ST Accel. Beams 6, 094201 (2003) [9 pages]

Parametric collective resonances and space-charge limit in high-intensity rings

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A. V. Fedotov
CA Department, Brookhaven National Laboratory, Upton, New York 11973, USA

I. Hofmann
GSI, 64291 Darmstadt, Germany

R. L. Gluckstern
Physics Department, University of Maryland, College Park, Maryland 20742, USA

H. Okamoto
Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan

Received 17 July 2003; published 25 September 2003

Resonance-driven collective instabilities of charged-particle beams were extensively studied in connection with high-current transport systems, leading to restrictions imposed on the zero-current phase advance. In this paper, we discuss application of such parametric instabilities to circular machines. This effect is directly related to the space-charge limit in rings and its understanding is of crucial importance. Its relation to the coherent resonance condition of an integer type is explained. Practical application of such resonant responses to both structural and imperfection driven harmonics is addressed.

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© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.6.094201
DOI:
10.1103/PhysRevSTAB.6.094201
PACS:
29.27.Bd