| Paper |
Title |
Page |
| 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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| THPB076 |
Quality Control of Welding, Brazing Joints and Cu Deposition on EU-XFEL Coupler Parts |
1301 |
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- A. Ermakov, D. Kostin, W.-D. Möller
DESY, Hamburg, Germany
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In frames of EU-XFEL Project the quality control of fundamental 1.3GHz power couplers is very important task. The power coupler consists of a several number of parts including itself the different types of welding and brazing joints between ceramic, copper and stainless steel components. The quality of these joints is subject to be investigated and controlled according to EU-XFEL Coupler specification taking into account the different coupler manufacturers involved. The quality of Cu deposition on some EU-XFEL coupler parts is also the issue to be qualified according to specs. The number of microscope images of different types of joints and Cu deposition on some EU-XFEL 1.3GHz coupler parts are presented.
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