Report/Journal Article

PUBDB-2017-02147

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The superconducting TESLA cavities

Aune, B. ; Bandelmann, R.DESY* ; Bloess, D. ; Bonin, B. ; Bosotti, A. ; Champion, M. ; Crawford, C. ; Deppe, G. ; Dwersteg, B. ; Edwards, D. A. ; Edwards, H.DESY* ; Ferrario, M. ; Fouaidy, M. ; Gall, P.-D. ; Gamp, A.DESY* ; Gössel, A. ; Graber, J. ; Hubert, D. ; Huening, M.DESY* ; Juillard, M. ; Junquera, T. ; Kaiser, H. ; Kreps, G.DESY* ; Kuchnir, M. ; Lange, R. ; Leenen, M. ; Liepe, M. ; Lilje, L.DESY* ; Matheisen, A. ; Möller, W.-D. ; Mosnier, A. ; Padamsee, H. ; Pagani, C. ; Pekeler, M. ; Peters, H.-B. ; Peters, O.DESY* ; Proch, D. ; Rehlich, K. ; Reschke, D.DESY* ; Safa, H. ; Schilcher, T. ; Schmüser, P. ; Sekutowicz, J.DESY* ; Simrock, S.Extern* ; Singer, W.DESY* ; Tigner, M. ; Trines, D.DESY* ; Twarowski, K. ; Weichert, G.DESY* ; Weisend, J. ; Wojtkiewicz, J. ; Wolff, S. ; Zapfe, K.DESY*

2000
American Physical Society College Park, MD

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Please use a persistent id in citations: doi:10.1103/PhysRevSTAB.3.092001  doi:10.3204/PUBDB-2017-02147

Report No.: DESY-00-031; physics/0003011

Abstract: The conceptional design of the proposed linear electron-positron collider TESLA is based on 9-cell 1.3 GHz superconducting niobium cavities with an accelerating gradient of Eacc >= 25 MV/m at a quality factor Q0 > 5E+9. The design goal for the cavities of the TESLA Test Facility (TTF) linac was set to the more moderate value of Eacc >= 15 MV/m. In a first series of 27 industrially produced TTF cavities the average gradient at Q0 = 5E+9 was measured to be 20.1 +- 6.2 MV/m, excluding a few cavities suffering from serious fabrication or material defects. In the second production of 24 TTF cavities additional quality control measures were introduced, in particular an eddy-current scan to eliminate niobium sheets with foreign material inclusions and stringent prescriptions for carrying out the electron-beam welds. The average gradient of these cavities at Q0 = 5E+9 amounts to 25.0 +- 3.2 MV/m with the exception of one cavity suffering from a weld defect. Hence only a moderate improvement in production and preparation techniques will be needed to meet the ambitious TESLA goal with an adequate safety margin. In this paper we present a detailed description of the design, fabrication and preparation of the TESLA Test Facility cavities and their associated components and report on cavity performance in test cryostats and with electron beam in the TTF linac. The ongoing R&D towards higher gradients is briefly addressed.

Keyword(s): electron positron: linear collider ; linear collider: proposed ; RF system: superconductivity ; niobium ; electric field: upper limit ; fabrication ; RF system: power supply ; microwaves: energy loss ; DESY Lab ; bibliography

Note: M-Bereich

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Contributing Institute(s):

1. DESY Retrocat (DESY(-2012))

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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