Prediction and suppression of beam breakup instability in multicell superconducting cavities

V. Volkov

doi:10.1103/PhysRevSTAB.12.011301

← Back to search

Prediction and suppression of beam breakup instability in multicell superconducting cavities

V. Volkov

DOI 10.1103/PhysRevSTAB.12.011301 · Physical Review Special Topics - Accelerators and Beams

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Beam breakup instability in superconducting cavities is a serious problem. In this work, a four-cell LEP cavity installed in the KAERI linear accelerator is considered as an example. Dependence of the breakup instability threshold currents on the characteristics of a dipole mode was determined both analytically and numerically. An efficient technique to suppress breakup instability using rf beam focusing within a cavity is suggested. The technique involves applying TE-type monopole higher-order modes and is useful for multicell superconducting cavities with many trapped high-Q dipole modes.