Author/Authors :
Lilje، نويسنده , , L. and Antoine، نويسنده , , C. and Benvenuti، نويسنده , , C. and Bloess، نويسنده , , D. and Charrier، نويسنده , , J.-P. and Chiaveri، نويسنده , , E. and Ferreira، نويسنده , , L. and Losito، نويسنده , , R. and Matheisen، نويسنده , , Joshua A. and Preis، نويسنده , , H. and Proch، نويسنده , , D. and Reschke، نويسنده , , D. and Safa، نويسنده , , H. and Schmüser، نويسنده , , P. and Trines، نويسنده , , D. and Visentin، نويسنده , , B. and، نويسنده ,
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.
Keywords :
Superconducting rf cavities , niobium , Surface treatments , Accelerating gradients , High-energy accelerators
