Analysis of the Production, Installation and Commissioning of the European-XFEL Frequency Tuners

Rocco Paparella , Clemens Albrecht , Serena Barbanotti , Andrea Bellandi , Angelo Bosotti , Julien Branlard , Christelle Cloué (1) , Kay Jensch , Lutz Lilje , Catherine Madec (2) , Daniele Sertore , Thierry Trublet (1)

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 CEA - Commissariat à l'énergie atomique et aux énergies alternatives

In the European-XFEL superconducting linac, mechanical frequency tuners equipped with stepper motors and piezoelectric actuators provide cold tuning of each of the 768 1.3 GHz cavities. More than 820 complete tuning systems were fabricated and pre-assembled in industry, tested at several stages before and after assembly and successfully commissioned during cryo-module cold tests at AMTF (DESY). Quality control strategy adopted to preserve the well-assessed tuner reliability through such a large-scale industrial production is critically reviewed and the lessons learned are presented in this paper. The statistical analysis of the large set of data acquired up to the recent commissioning of the entire linac is then summarized.

Mots clés: ion; cavity; FEL; cryomodule; controls

Domaines: Physique des accélérateurs [physics.acc-ph]

Rocco Paparella, Clemens Albrecht, Serena Barbanotti, Andrea Bellandi, Angelo Bosotti, et al.. Analysis of the Production, Installation and Commissioning of the European-XFEL Frequency Tuners. 18th International Conference on RF Superconductivity, Jul 2017, Lanzhou, China. pp.MOPB076, ⟨10.18429/JACoW-SRF2017-MOPB076⟩. ⟨hal-01796893⟩