期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 441, 期 1-2, 页码 1-6出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2006.03.050
关键词
superconducting RF cavities; microphonics; ponderomotive effects; instabilities; RF control
`Phase and amplitude stabilization of the fields in superconducting cavities in the presence of ponderomotive effects and microphonics was one of the major challenges that had to be surmounted in order to make superconducting rf accelerators practical. This was of particular concern in low-velocity proton and ion accelerators since the beam loading was often negligible, but was usually not relevant in electron accelerators since the beam loading was often high and the gradients-low. More recent or future applications of electron linacs-for example JLab upgrade, energy recovering linacs (ERLs)-will operate at increasingly higher gradients with little beam loading, and the issues associated with microphonics and ponderomotive instabilities will again become relevant areas of research. This paper will describe the ponderomotive instabilities and the conditions under which they can occur, and review the methods by which they, and microphonics, can be overcome. (c) 2006 Elsevier B.V. All rights reserved.
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