Improved surface treatment of the superconducting TESLA cavities

Details Improved surface treatment of the superconducting TESLA cavities Improved surface treatment of the superconducting TESLA cavities

2004-01-27

arxiv.org/abs/physics/0401134v1

Nucl.Instrum.Meth.A516:213-227,2004

Physics

Accelerator Physics

Scientific paper

10.1016/j.nima.2003.08.116

The proposed linear electron-positron collider TESLA is based on 1.3 GHz superconducting niobium cavities for particle acceleration. For a centre-of-mass energy of 500 GeV, an accelerating field of 23.4 MV/m is required which is reliably achieved with a niobium surface preparation by chemical etching. An upgrade of the collider to 800 GeV requires an improved cavity preparation technique. In this paper, results are presented on single-cell cavities which demonstrate that fields of up to 40 MV/m are accessible by electrolytic polishing of the inner surface of the cavity.

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