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| THPB023 |
The Statistics of Industrial XFEL Cavities Fabrication at E.ZANON |
1119 |
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- A. Gresele, M. Giaretta, A. Visentin
Ettore Zanon S.p.A., Nuclear Division, Schio, Italy
- A.A. Sulimov, J.H. Thie
DESY, Hamburg, Germany
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Serial production of superconducting cavities for European-XFEL will be completed at E.ZANON by the end of 2015. For that reason we can summarize the results and present the statistics of industrial cavity fabrication. Many parameters have been traced during different steps of cavity production. The most interesting of them, as cavity length, frequency, field flatness and eccentricity, are presented and discussed.
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Poster THPB023 [3.227 MB]
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| THPB031 |
Operation Experience with Half Cell Measurement Machine and Cavity Tuning Machine in 3 Years of European XFEL Cavity Series Production |
1149 |
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- J.H. Thie, A. Gössel, J. Iversen, D. Klinke, C. Müller, A.A. Sulimov, D. Tischhauser
DESY, Hamburg, Germany
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For the European XFEL superconducting Cavity series production at both cavity vendors’ four manufacturing machines for production key functions, HAZEMEMA and CTM, are supplied by DESY. Among three years of cavity production in two companies a lot of experience is gathered about influence of surroundings and production quality on cycle times, machine drop outs, general stability time of machines and parts subject to wear. Significant factors on cycle time for tuning operation like temperature stability and drift during tuning and measurements, precision of cell trimming before welding and tuning and generally geometrical factors are shown. RF aspects of tuning and production quality control as additional measurements for TM011-mode to estimate quality of its damping is presented. Performed full Cavity RF measurements exceeds XFEL specifications gives a possibility for additional quality control on welding shrinkage stability and it’s homogeneously distribution. The use of HAZEMEMA and CTM to assess the impact of asymmetric trimming, including calculation of it’s influence on the higher-order modes, is shown.
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Poster THPB031 [0.201 MB]
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| THPB039 |
XFEL Database User Interface |
1168 |
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- S. Yasar, P.D. Gall, V. Gubarev, D. Reschke, A.A. Sulimov, J.H. Thie
DESY, Hamburg, Germany
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The XFEL database plays an important role for an effective part of the quality control system for the whole cavity production and preparation process for the European XFEL on a very detailed level. Database has the Graphical User Interface based on the web-technologies, and it can be accessed via low level Oracle SQL.
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| THPB068 |
Practical Aspects of HOM Suppression Improvement for TM011 |
1277 |
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- A.A. Sulimov, A. Ermakov, J.H. Thie
DESY, Hamburg, Germany
- A. Gresele
Ettore Zanon S.p.A., Nuclear Division, Schio, Italy
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Some Higher Order Modes (HOM) pass bands were controlled during cryo-tests at DESY for the European XFEL cavities. The second monopole mode (TM011) showed most instabilities and suppression degradation. The authors will explain this phenomenon on the example of cavity CAV00553 and present the practical method of TM011 damping improvement.
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Poster THPB068 [0.182 MB]
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