A Fast Beam–Ion Instability in Linear Accelerators and Storage Rings


The interaction of an electron beam with residual gas ions results in mutually driven transverse oscillations. This effect arises during the passage of a single train of bunches. An equivalent instability mechanism is encountered in positron beams where ionization electrons oscillate within a single bunch. In either case, the oscillations grow exponentially with an exponent proportional to t1/2. In this report, the rise time of the instability is calculated analytically by a perturbation series approach and is compared with computer simulations. Growth rates are evaluated for several existing or proposed storage rings and linear accelerators; the effect considered could be a significant limitation in many of the future designs. Submitted to Physical Review E ∗Work supported by Department of Energy Contract DE–AC03–76SF00515. Typeset using REVTEX

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@inproceedings{Raubenheimer1997AFB, title={A Fast Beam–Ion Instability in Linear Accelerators and Storage Rings}, author={T . O . Raubenheimer}, year={1997} }