Development of large grain cavities

DESY activities on 1.3 GHz tesla shape single cell and nine-cell large grain (LG) resonators are presented; results of the past five years are covered. The R&D program explores the potential for production of elliptical superconducting cavities. The main efforts have been devoted to material inv...

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Bibliographic Details
Published in:Physical review special topics. PRST-AB. Accelerators and beams 2013-01, Vol.16 (1), p.012003, Article 012003
Main Authors: Singer, W., Aderhold, S., Ermakov, A., Iversen, J., Kostin, D., Kreps, G., Matheisen, A., Möller, W.-D., Reschke, D., Singer, X., Twarowski, K., Weise, H., Brokmeier, H.-G.
Format: Article
Language:English
Subjects:
Cavity resonators
Chemical polishing
Disks
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Summary:DESY activities on 1.3 GHz tesla shape single cell and nine-cell large grain (LG) resonators are presented; results of the past five years are covered. The R&D program explores the potential for production of elliptical superconducting cavities. The main efforts have been devoted to material investigation, development of LG disk production, cavity fabrication from this material, and a search for appropriate treatment. More than 250 LG disks are manufactured; several single cell and 11 nine-cell resonators are produced and rf tested after buffered chemical polishing and after additional electropolishing. A maximum accelerating gradient of approximately 45MV/m for this type of cavity was achieved in two resonators. Two of the LG cavities have been installed and are currently being used in the FLASH accelerator operation. Assembly of a cryomodule, consisting of LG cavities only, is in the works. Perspectives of the LG cavity application are discussed.
ISSN:1098-4402
1098-4402
2469-9888
DOI:10.1103/PhysRevSTAB.16.012003