Improved Surface Treatment of the Superconducting TESLA Cavities
/ Authors
L. Lilje, C. Antoine, C. Benvenuti, D. Bloess, J. Charrier, E. Chiaveri, L. Ferreira, R. Losito, A. Matheisen, H. Preis
and 7 more authors
D. Proch, D. Reschke, H. Safa, P. Schmueser, D. Trines, B. Visentin, H. Wenninger
/ Abstract
Abstract 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.
Journal: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment